Relevant bibliographies by topics / IDF curves

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'IDF curves'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 July 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'IDF curves.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "IDF curves"

Acosta-Castellanos, Pedro Mauricio, Yuddy Alejandra Castro Ortegón, and Nestor Rafael Perico Granados. "Regionalization of IDF Curves by Interpolating the Intensity and Adjustment Parameters: Application to Boyacá, Colombia, South America." Water 15, no. 3 (January 31, 2023): 561. http://dx.doi.org/10.3390/w15030561.

Full text

Abstract:

Intensity, duration and frequency (IDF) curves are necessary tools for the design and construction of hydraulic projects. However, the pluviographic records needed to determine the IDF curves do not exist or are scarce. This research presents the regionalization of the IDF curves for the department of Boyacá, Colombia, which is made up of 16 municipalities including the provincial capital, Tunja. For the regionalization, the adjustment parameters (u and α) of the IDF curve stations in the study area were used. In the case of regionalization by the parameters found for the construction of the IDF curves, estimation methods with ordinary moments means and maximum likelihood were used. The regionalization and interpolation of the data were performed with Arcgis software. The resulting isoline maps were made in the case of regionalization intensities, and each map is associated with a different return period and duration to construct the IDF curves in the studied area. In the case of the regionalization maps, the parameters associated with each individual parameter were performed last. The results show that the use of IDF curve data is more accurate and reduces errors in the design. With the methods proposed in this study, IDF curves can be constructed for any site of interest that does not have rainfall stations.

APA, Harvard, Vancouver, ISO, and other styles

Ariff, Noratiqah Mohd, Abdul Aziz Jemain, and Mohd Aftar Abu Bakar. "Potential of plotting positions for intensity-duration-frequency curves with short rainfall records." Malaysian Journal of Fundamental and Applied Sciences 13, no. 4-1 (December 5, 2017): 394–99. http://dx.doi.org/10.11113/mjfas.v13n4-1.814.

Full text

Abstract:

Intensity-duration-frequency (IDF) curves represent the relationship between storm intensity, storm duration and return period. The IDF curves available are mostly done by fitting series of annual maximum rainfall intensity to parametric distributions. However, the length of annual rainfall records, especially for small scaled data, are not always enough. Rainfall records of less than 50 years are usually deemed insufficient to unequivocally identify the probability distribution of the annual rainfall. Thus, this study introduces an alternative approach that replaces the need for parametric fitting by using empirical distribution based on plotting positions to represent annual maximum rainfall series. Subsequently, these plotting positions are used to build IDF curves. The IDF curves found are then compared to the IDF curves yielded from the parametric GEV distribution which is a common basis for IDF curves. This study indicates that IDF curves obtained using plotting positions are similar to IDF curves found using GEV distribution for storm events. Hence, researchers could model and subsequently build IDF curves for annual rainfall records of less than 50 years by using plotting positions and avoid any probability distribution fitting of insufficient data.

APA, Harvard, Vancouver, ISO, and other styles

de Souza Costa, Carlos Eduardo Aguiar, Claudio José Cavalcante Blanco, and José Francisco de Oliveira-Júnior. "IDF curves for future climate scenarios in a locality of the Tapajós Basin, Amazon, Brazil." Journal of Water and Climate Change 11, no. 3 (January 16, 2019): 760–70. http://dx.doi.org/10.2166/wcc.2019.202.

Full text

Abstract:

Abstract Changes in the global climate are attributed to the levels of greenhouse gases. Thus, future scenarios (Representative Concentration Pathways – RCPs) have been developed to explore the impact of different climate policies on the world. The RCPs are essential tools for General Circulation Models (GCMs) to simulate future climate changes. Curves that associate Intensity, Duration and Frequency (IDF) are used in forecasts and are fundamental for the design of hydraulic projects and risk management. The objective of this study was to design IDF curves for the RCP 4.5 and 8.5, using data from the HadGEM2-ES, CanESM2 and MIROC5 models. The Equidistance Quantile Matching Method was used to design the IDF curves. The simulated curves presented differences when related to the existing curve. The largest differences were for the MIROC5 (146% in RCP 8.5) and the smallest differences were for the CanESM2 (−20.83% for RCP 8.5). This result demonstrates that the method incorporates changes in future climate variability. The spatial resolutions of each model influenced their IDF curves, which led the CanESM2 curves to not present satisfactory results that are different from the MIROC5 curves, which were the ones that best represented the possible future differences.

APA, Harvard, Vancouver, ISO, and other styles

Nandalal, K. D. W., and P. Ghnanapala. "Development of IDF Curves for Colombo." Engineer: Journal of the Institution of Engineers, Sri Lanka 50, no. 1 (February 9, 2017): 33. http://dx.doi.org/10.4038/engineer.v50i1.7242.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Alsumaiti, Tareefa S., Khalid A. Hussein, Dawit T. Ghebreyesus, Pakorn Petchprayoon, Hatim O. Sharif, and Waleed Abdalati. "Development of Intensity–Duration–Frequency (IDF) Curves over the United Arab Emirates (UAE) Using CHIRPS Satellite-Based Precipitation Products." Remote Sensing 16, no. 1 (December 20, 2023): 27. http://dx.doi.org/10.3390/rs16010027.

Full text

Abstract:

The recent flooding events in the UAE have emphasized the need for a reassessment of flood frequencies to mitigate risks. The exponential urbanization and climatic changes in the UAE require a reform for developing and updating intensity–duration–frequency (IDF) curves. This study introduces a methodology to develop and update IDF curves for the UAE at a high spatial resolution using CHIRPS (Climate Hazards Group InfraRed Precipitation with Station) data. A bias correction was applied to the CHIRPS data, resulting in an improved capture of extreme events across the country. The Gumbel distribution was the most suitable theoretical distribution for the UAE, exhibiting a strong fit to the observed data. The study also revealed that the CHIRPS-derived IDF curves matched the shape of IDF curves generated using rain gauges. Due to orographic rainfall in the northeastern region, the IDF intensities were at their highest there, while the aridity of inland regions resulted in the lowest intensities. These findings enhance our understanding of rainfall patterns in the UAE and support effective water resource management and infrastructure planning. This study demonstrates the potential of the CHIRPS dataset for IDF curve development, emphasizes the importance of performing bias corrections, and recommends tailoring adjustments to the intended application.

APA, Harvard, Vancouver, ISO, and other styles

Schardong, Andre, Slobodan P. Simonovic, Abhishek Gaur, and Dan Sandink. "Web-Based Tool for the Development of Intensity Duration Frequency Curves under Changing Climate at Gauged and Ungauged Locations." Water 12, no. 5 (April 27, 2020): 1243. http://dx.doi.org/10.3390/w12051243.

Full text

Abstract:

Rainfall Intensity–Duration–Frequency (IDF) curves are among the most essential datasets used in water resources management across the globe. Traditionally, they are derived from observations of historical rainfall, under the assumption of stationarity. Change of climatic conditions makes use of historical data for development of IDFs for the future unreliable, and in some cases, may lead to underestimated infrastructure designs. The IDF_CC tool is designed to assist water professionals and engineers in producing IDF estimates under changing climatic conditions. The latest version of the tool (Version 4) provides updated IDF curve estimates for gauged locations (rainfall monitoring stations) and ungauged sites using a new gridded dataset of IDF curves for the land mass of Canada. The tool has been developed using web-based technologies and takes the form of a decision support system (DSS). The main modifications and improvements between version 1 and the latest version of the IDF_CC tool include: (i) introduction of the Generalized Extreme value (GEV) distribution; (ii) updated equidistant matching algorithm (QM); (iii) gridded IDF curves dataset for ungauged location and (iv) updated Climate Models.

APA, Harvard, Vancouver, ISO, and other styles

Mohymont, B., G. R. Demarée, and D. N. Faka. "Establishment of IDF-curves for precipitation in the tropical area of Central Africa - comparison of techniques and results." Natural Hazards and Earth System Sciences 4, no. 3 (May 28, 2004): 375–87. http://dx.doi.org/10.5194/nhess-4-375-2004.

Full text

Abstract:

Abstract. The establishment of Intensity-Duration-Frequency (IDF) curves for precipitation remains a powerful tool in the risk analysis of natural hazards. Indeed the IDF-curves allow for the estimation of the return period of an observed rainfall event or conversely of the rainfall amount corresponding to a given return period for different aggregation times. There is a high need for IDF-curves in the tropical region of Central Africa but unfortunately the adequate long-term data sets are frequently not available. The present paper assesses IDF-curves for precipitation for three stations in Central Africa. More physically based models for the IDF-curves are proposed. The methodology used here has been advanced by Koutsoyiannis et al. (1998) and an inter-station and inter-technique comparison is being carried out. The IDF-curves for tropical Central Africa are an interesting tool to be used in sewer system design to combat the frequently occurring inundations in semi-urbanized and urbanized areas of the Kinshasa megapolis.

APA, Harvard, Vancouver, ISO, and other styles

Thanh, Son Tran, and Anh Ha Xuan. "Deriving of Intensity–Duration–Frequency (IDF) curves for precipitation at Hanoi, Vietnam." E3S Web of Conferences 403 (2023): 06002. http://dx.doi.org/10.1051/e3sconf/202340306002.

Full text

Abstract:

The rainfall Intensity-Duration-Frequency (IDF) relationship is one of the most commonly used tools in establishing rain intensity formulas for urban stormwater drainage design. Currently, the rain formulas being applied in Vietnam according to the design standard TCVN 7957-2008 are mostly Soviet formulas with climate parameters dating back to the 80s of the twentieth century. Therefore, it is no longer suitable for the calculation of the current stormwater drainage system, especially in the context of climate change. In this paper, we used statistical methods to process rain gauge data from 1960 to 2021 to build the IDF curve for the inner city of Hanoi (Vietnam). The results show that the new IDF curves are more suitable for the current climate situation than the IDF curves according to TCVN 7957-2008.

APA, Harvard, Vancouver, ISO, and other styles

Mohammed, Abdulrasheed, Salisu Dan’Azumi, Abubakar Ahmed Modibbo, and Abubakar Abbas Adamu. "DEVELOPMENT OF RAINFALL INTENSITY DURATION FREQUENCY (IDF) CURVES FOR DESIGN OF HYDRAULIC STRUCTURES IN KANO STATE, NIGERIA." Platform : A Journal of Engineering 5, no. 2 (June 30, 2021): 10. http://dx.doi.org/10.61762/pajevol5iss2art12706.

Full text

Abstract:

Rainfall intensity is an essential parameter in the design of any hydraulic structure. The IDF curves are used to design hydraulic structures such as culverts, bridges, roads, urban drainage systems, and many more. Colonial masters developed the first IDF curve for Kano State based on records of 1938 - 1944 (6 years) followed by Oyenbade (1982), and since then, it has not been reviewed or updated. As a result of changes in rainfall patterns that have taken place over time and the climate change, the Oyenbade IDF curves might no longer be suitable for hydraulics design in Kano State. Therefore, this research aims to develop the new IDF curves and establish empirical equations of rainfall intensity that can be used for safe and economic hydraulics design in Kano State. India Meteorological Department (IMD) reduction formula was used to disaggregate maximum daily rainfall of Kano gauge station into the rainfall of shorter durations. Lognormal probability distribution was found to fit best the data set of all the durations using Easyfit 5.0 software and estimate rainfall intensities for 2, 5, 10, 25, 50, and 100 years return periods. It was found out that rainfall intensities increase with the increase in return periods but decreases with an increase in duration. The coefficient of determination ‘R2’ for all return periods indicated a strong relationship in IDF models developed. Hence, the new IDF curves developed should estimate rainfall intensities for hydraulics design in Kano State. The derived IDF models could be used for better results and accuracy. Keywords: Probability distributions, IMD reduction formula, return periods, rainfall duration, easy fit software 5.0

APA, Harvard, Vancouver, ISO, and other styles

Singh, Vijay P., and Lan Zhang. "IDF Curves Using the Frank Archimedean Copula." Journal of Hydrologic Engineering 12, no. 6 (November 2007): 651–62. http://dx.doi.org/10.1061/(asce)1084-0699(2007)12:6(651).

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "IDF curves"

Castillo, Jean M. "Duration-rainfall intensity equations : study of IDF curves using local precipitation data /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1203570521&sid=23&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Haruna, Abubakar. "Améliorer l'estimation des aléas de précipitations grâce aux relations Intensité-Durée-Aire-Fréquence (IDAF). Application à une zone à la topographie complexe." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU002.

Full text

Abstract:

À une époque impactée par des phénomènes météorologiques de plus en plus variables qui peuvent modifier profondément les communautés, l'importance de prédictions fiables des précipitations extrêmes à de multiples échelles n'a jamais été aussi prédominante. Malgré sa portée cruciale, une prédiction précise demeure un défi de taille, en particulier dans les régions montagneuses, qui sont particulièrement exposées aux risques associés aux précipitations extrêmes. Par conséquent, des outils plus robustes sont nécessaires pour une prédiction fiable.Les relations Intensité-Durée-Aire-Fréquence (IDAF) résument les principales caractéristiques statistiques des précipitations extrêmes. Elles sont utilisées pour la quantification des aléas de précipitations et le développement de systèmes d'alerte précoce. Alors que les relations Intensité-Durée-Fréquence (IDF) pour les précipitations ponctuelles ont été largement étudiées, les relations IDAF, prenant en compte la zone d'accumulation, ont reçu beaucoup moins d'attention et, à notre connaissance, seulement pour les extrêmes.Cette thèse vise à modéliser les relations IDAF des précipitations pour toute la gamme des précipitations non nulles dans des zones à la topographie complexe (avec application en Suisse), où des modèles robustes et flexibles sont nécessaires en raison de la forte variabilité spatio-temporelle des précipitations. La grande originalité de cette thèse est que les relations IDAF sont développées pour toute la gamme des intensités de précipitations non nulles, et pas seulement pour les extrêmes. Les distributions marginales robustes des relations modélisées peuvent être utilisées dans les générateurs stochastiques de précipitation.Premièrement, nous avons identifié un modèle parcimonieux au sein de la famille extended generalized Pareto (EGPD) pour modéliser la distribution des intensités non nulles. Deuxièmement, nous avons développé trois modèles de régionalisation pour améliorer la robustesse et la fiabilité des estimations quotidiennes des précipitations. Les résultats montrent que toutes les méthodes régionales offrent une robustesse et une fiabilité accrues en matière de prédiction par rapport au modèle local (sans régionalisation). La méthode spatiale basée sur des modèles additifs généralisés (GAM) a démontré de meilleurs résultats pour les extrêmes, alors que la méthode sur l'approche de la région d'influence a conduit à de meilleurs résultats dans le centre de la distribution.Troisièmement, nous avons développé des modèles de relations IDF en utilisant toutes les intensités de précipitations non nulles afin d'inclure efficacement les informations disponibles. Trois approches ont été envisagées. La première est basée sur la propriété d'invariance d'échelle des précipitations, la deuxième sur la formulation générale des IDF et la dernière est purement basée sur les données (data-driven), employant des équations déterminées empiriquement pour modéliser les relations IDF. Les meilleurs résultats ont été obtenus par la troisième. Des courbes IDF à l'échelle de bassins versants ont été générées à partir de ce modèle pour une utilisation opérationnelle, et les distributions marginales journalières dérivées des modèles sont destinées à être utilisées dans un générateur stochastique de précipitation.Enfin, nous avons construit des relations IDAF basées sur une approche data-driven en utilisant un produit de réanalyse radar. Le modèle nous a permis de caractériser l'aléa de précipitations surfaciques pour un continuum d'échelles spatio-temporelles. Dans l'ensemble, les résultats ont permis de mieux comprendre les variabilités saisonnières et régionales de l'aléa de précipitation en Suisse. Pour de courtes durées, les niveaux les plus élevés sont observés en été, tandis qu'à l'échelle journalière, les niveaux les plus élevés sont observés en automne, notamment au Tessin, région identifiée comme la plus exposée aux précipitations extrêmes à toutes les échelles
In an era marked by increasingly volatile weather patterns and their profound impact, reliable prediction of extreme precipitation across multiple scales has never been more challenging. Despite its pivotal significance, accurate prediction remains a formidable challenge, especially in mountainous regions that are particularly susceptible to extreme precipitation hazards. As a result, more robust and efficient tools are needed for reliable prediction.Intensity-Duration-Area-Frequency (IDAF) relationships summarize the main statistical characteristics of extreme precipitation. They are used for areal rainfall hazard quantification, storm characterization, and early warning system development. While Intensity-Duration--Frequency (IDF) relationships for point precipitation have been extensively studied, IDAF relationships, accounting for the area of accumulation, have received far less attention and to our knowledge only for extremes.This thesis aims to model the IDAF relationships for the whole range of non-zero precipitation in topographically complex areas (with application in Switzerland) where robust and flexible models are required due to the strong spatio-temporal variability of precipitation. The key novelty is that IDAF relationships are developed for the whole range of non-zero precipitation intensities, not just extremes. In addition to its usual application, the marginal distributions from the relationships can be utilized in stochastic weather generators.Four objectives were identified and carefully addressed. First, we identified a parsimonious three-parameter model within the extended generalized Pareto distribution (EGPD) family to model the distribution of non-zero precipitation intensities. Second, we build regionalization models based on three regionalization approaches to improve the robustness and reliability of daily precipitation estimates. The first relies on a fast algorithm that defines distinct homogeneous regions based on upper tail similarity, the second is based on the region-of-influence approach, and the third is a spatial approach based on Generalized Additive Model. All the regional models offered improved robustness and reliability in prediction compared to the local model (without regionalization). The GAM-based method was better in the upper tail, while the ROI method performed better in the bulk of the distribution.Third, we developed IDF relationships using all non-zero rainfall intensities for 30 min to 72 hr, making efficient use of available information. Three approaches were considered, the first is based on precipitation scale invariance, the second relies on the general IDF formulation, and the last is purely data-driven, employing empirically determined relationships to model the IDF relationships. The best results were shown by the model based on the data-driven approach. It reproduced the known space and time variability of extreme rainfall across Switzerland, catchment-level IDF curves were generated from it for operational use, and the daily marginal distributions derived from the models are intended to be used in a stochastic weather generator currently developed for operational use.Finally, we constructed IDAF relationships based on a data-driven approach for 1 to 72 hr and 1 to 1,089 km2 at each pixel, utilizing a radar-reanalysis product. The model allowed us to characterize areal precipitation hazards for a continuum of spatio-temporal scales. Overall, the results provided insights into the seasonal and regional patterns of precipitation hazards in Switzerland, highlighting the importance of considering multiple spatio-temporal scales when assessing extreme precipitation hazards. For short durations (e.g. 1 hr), the highest levels are almost exclusively observed in summer, while for the daily scale, the highest levels are observed during autumn, particularly in Ticino, a region identified as the most exposed to extreme precipitation across all scales

APA, Harvard, Vancouver, ISO, and other styles

Eckersten, Sofia. "Updating Rainfall Intensity-Duration-Frequency Curves in Sweden Accounting for the Observed Increase in Rainfall Extremes." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-283714.

Full text

Abstract:

Increased extreme precipitation has been documented in many regions around the world, in- cluding central and northern Europe. Global warming increases average temperature, which in turn enhances atmospheric water holding capacity. These changes are believed to increase the frequency and/or intensity of extreme precipitation events. In determining the design storm, or a worst probable storm, for infrastructure design and failure risk assessment, experts commonly assume that statistics of extreme precipitation do not change significantly over time. This so- called notion of stationarity assumes that the statistics of future extreme precipitation events will be similar to those of historical observations. This study investigates the consequences of using a stationary assumption as well as the alternative: a non-stationary framework that con- siders temporal changes in statistics of extremes. Here we evaluate stationary and non-stationary return levels for 10-year to 50-year extreme precipitation events for different durations (1-day, 2-day, ..., 7-day precipitation events), based on the observed daily precipitation from Sweden. Non-stationary frequency analysis is only considered for stations with statistically significant trends over the past 50 years at 95% confidence (i.e., 15 to 39 % out of 139 stations, depend- ing on duration, 1-day, 2-day, ..., 7-day). We estimate non-stationary return levels using the General Extreme Value distribution with time-dependent parameters, inferred using a Bayesian approach. The estimated return levels are then compared in terms of duration, recurrence in- terval and location. The results indicate that a stationary assumption might, when a significant trend exists, underestimate extreme precipitation return levels by up to 40 % in Sweden. This report highlights the importance of considering better methods for estimating the recurrence in- terval of extreme events in a changing climate. This is particularly important for infrastructure design and risk reduction.
Ökad extrem nederbörd har dokumenterats globalt, däribland centrala och norra Europa. Den globala uppvärmningen medför en förhöjd medeltemperatur vilket i sin tur ökar avdunstning av vatten från ytor samt atmosfärens förmåga att hålla vatten. Dessa förändringar tros kunna öka och intensifiera nederbörd. Vid bestämning av dimensionerande nederbördsintensiteter för byggnationsprojekt antas idag att frekvensen och storleken av extrem nederbörd inte kommer att förändras i framtiden (stationäritet), vilket i praktiken innebär ingen förändring i klimatet. Den här studien syftar till att undersöka effekten av en icke-stationärt antagande vid skattning av dimensionerande nederbördsintensitet. Icke-stationära och stationära nerderbördsintensiteter föråterkomsttider mellan 10 och 100år bestämdes utifrån daglig och flerdaglig svensk nederbörds- data. Nederbördintensiteterna bestämdes med extremvärdesanalys i mjukvaran NEVA, där den generella extremvärdesfördelningen anpassades till årlig maximum nederbörd på platser i Sverige som påvisade en ökande trend under de senaste 50åren (15% till 39 % utav 139 stationer, beroende på varaktighet). De dimensionerande nederbördsintensiteterna jämfördes sedan med avseende på varaktighet, återkomsttid och plats. Resultaten indikerade på att ett stationärt antagande riskerar att underskatta dimensionerande nederbördsintensiteter för en viss återkomsttid med upp till 40 %. Detta indikerar att antagandet om icke-stationäritet har större betydelse för olika platser i Sverige, vilket skulle kunna ge viktig information vid bestämning av dimensionerande regnintensiteter.

APA, Harvard, Vancouver, ISO, and other styles

Torres, Quintana Eduardo Andrés. "Determinación de curvas IDF en la Región de Antofagasta, Chile." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/138960.

Full text

Abstract:

Ingeniero Civil
En la región de Antofagasta, ubicada en el extremo norte de Chile, se encuentra una de las zonas más áridas de Sudamérica. La cantidad de ríos y lagos que se ubican en la zona son escasos, y es por esto que la recolección y utilización de aguas no saladas es dificultosa, a la vez que cualquier tipo de proyecto que tenga que ver con hidráulica el recurso hídrico. Sumado a lo anterior, la información hidrológica de la zona es escasa, debido a la baja cantidad de estaciones de medición disponible, con un extenso período continuo de tiempo, ya los pocos estudios actualizados realizados en la zona, siendo el Atlas de "Precipitaciones máximas 1, 2 y 3 días" (DGA 1991) el más actualizado en curvas IDF, lo cual no es adecuado para el diseño de obras hidráulicas en el año 2016, debido a que no incorpora los últimos 25 años de la historia climática de la zona. Por ello, los objetivos del trabajo de título aquí presente serán actualizar los coeficientes de duración y frecuencia, curvas IDF (Intensidad-Duración-Frecuencia) de Antofagasta y presentar isoyetas actualizadas de la II región de Chile. Se realizaron todos los procesos normales en el análisis de datos hidrológicos para distribuciones extremas, conducentes a obtener proyecciones acertadas de la precipitación en escalas de tiempo de 1 a 72 horas, para períodos de retorno entre 2 a 100 años. El proceso realizado se divide en 3 grandes secciones. Primero, la obtención de datos, la cual se realizó a partir de la información de precipitaciones diarias disponible en el Banco Nacional de Aguas y la Dirección Meteorológica de Chile (DMC) y, se incorpora la información de datos horarios de reanálisis de la NASA, y CISL RDA. . Segundo, Análisis de Frecuencia, donde se encontraron las distribuciones que mejor representaban a los datos obtenidos y a partir de estas, se obtuvieron los coeficientes de duración y frecuencia para cada estación. Tercero, la generación de isoyetas correspondientes a la precipitación de período de retorno de 10 años y duración de 1 día, y las curvas Intensidad-Duración-Frecuencia para cada localidad. Los resultados demuestran la utilidad del uso de datos de reanálisis, y que las tormentas en el extremo norte del país han variado entre un 3 a un 15% (tanto para coeficientes de duración como de frecuencia) para algunas zonas, e, incluso, hasta variaciones superiores al 30% (positivas o negativas) para otras en su intensidad promedio para sus diferentes duraciones y períodos de retorno, al igual que en sus valores de cantidad total precipitada por tormenta extrema. Se concluye que los resultados antiguos ya no son adecuados para el diseño de obras hidráulicas actuales Las curvas IDF y las isoyetas presentadas son suficientes por tanto para proyectos que utilicen de las precipitaciones en la región de Antofagasta.

APA, Harvard, Vancouver, ISO, and other styles

Ludwig, Katharina. "Moduli of spin curves." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985261056.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Wedeniwski, Sebastian. "Primality tests on commutator curves." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963295438.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Markwig, Hannah. "The enumeration of plane tropical curves." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980700736.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Gonçalves, Lidiane Souza. "Relações intensidade-duração-frequência com base em estimativas de precipitação por satélite." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/49152.

Full text

Abstract:

Atualmente existe uma forte demanda por planos e projetos de drenagem urbana, em vista do crescimento da urbanização e de novas exigências legais. Tais planos e projetos poderão esbarrar em uma ausência de relações Intensidade-Duração-Frequência (IDF) para a maioria das cidades brasileiras, em vista da inexistência de dados pluviográficos que possibilitem sua construção. Neste trabalho, foram estimadas relações IDF para todas as sedes municipais brasileiras a partir de estimativas de precipitação do satélite TRMM, que faz medições com resolução temporal de 3 horas. As chuvas máximas com durações menores do que 3 horas foram obtidas através de relação entre durações. As curvas IDF geradas foram comparadas com relações IDF clássicas, estabelecidas com dados pluviográficos. Adicionalmente, foram comparadas com um método alternativo clássico de obtenção de relações IDF em locais sem dados pluviográficos, em que os totais pluviométricos diários são desagregados para durações menores. Os resultados mostram que as curvas IDF geradas a partir do TRMM possuem incertezas, porém são uma alternativa tão eficiente quanto a utilização de chuvas desagregadas a partir de dados pluviométricos.
Nowadays, there is a need for urban drainage projects and planning in Brazil, due to continuing urbanization and a new legal framework. Such plans and projects will demand Intensity-Duration-Frequency (IDF) relations, at least for cities larger than 100.000 inhabitants. Such relations, as well as the pluviographic data which is needed to build them, are often unavailable in Brazil. In this research IDF relations were estimated based on 3-hourly TRMM precipitation estimates. They were then compared to standard IDF relations in sites with pluviographic data. In addition, TRMM IDF relations were compared with another alternative technique for places lacking pluviographic data. Results showed that TRMM estimation of the rainfall still has important uncertainties, but are an alternative method for places without rainfall data.

APA, Harvard, Vancouver, ISO, and other styles

Rosalem, Lívia Malacarne Pinheiro. "Invento para determinação da interceptação de chuva pela serrapilheira em ecossistemas florestais." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-16042018-110427/.

Full text

Abstract:

A serrapilheira é compreendida como a camada acima do solo formada a partir de materiais que caem da vegetação, funcionando como um mecanismo de interceptação da chuva. Apesar do processo de interceptação ser significativo em áreas de florestas, geralmente esse processo é subestimado ou mesmo negligenciado em modelos hidrológicos, justificado pela dificuldade na obtenção desses dados. Este projeto propôs o desenvolvimento de um equipamento que permite realizar medidas em campo da interceptação da serrapilheira em área de cerrado sensu stricto. Com o equipamento desenvolvido, LID (Litter Interception Device), são realizadas medidas do volume de água retido na serrapilheira e do volume que passa pela serrapilheira, atingindo o solo. O LID foi testado e calibrado em laboratório utilizando chuva simulada de três diferentes intensidades sobre o equipamento, contendo três quantidades diferentes de serrapilheira, 2,97, 1,45 e 0,60 kg.m-2. As amostras de serrapilheira utilizadas nos testes foram retiradas de uma área experimental de mata nativa de cerrado sensu stricto, localizada no município de Itirapina, Estado de São Paulo. As intensidades utilizadas foram definidas a partir de uma curva Intensidade-Duração-Frequência (IDF) gerada para a área experimental. Além do bom funcionamento do LID, os testes serviram para determinar os parâmetros Cmax e Cmin (capacidade máxima e capacidade mínima de armazenamento, respectivamente) da serrapilheira do cerrado sensu stricto. Os resultados mostraram que com o LID são realizadas medições da taxa de retenção de água na serrapilheira (mm.min-1), bem como de sua evaporação (mm.min-1) com precisão. Os testes para calibração do pluviógrafo revelaram que as medidas eram sempre subestimadas, necessitando utilizar uma curva de calibração (R2 = 0,99) para corrigir os registros da intensidade que passa para o pluviógrafo. Os valores encontrados para os parâmetros Cmax (1,0 a 3,07 mm) e Cmin (0,78 a 2,27 mm) corroboram com os encontrados por outros autores para a serrapilheira de diferentes florestas. Verificou-se que a variável quantidade de serrapilheira (kg) influencia mais nesses valores, do que a intensidade da chuva (mm.h-1). Conclui-se com os resultados que o LID pode ser utilizado em estudos que pretendam analisar o papel da serrapilheira em processos hidrológicos, sejam estes para a determinação da interceptação da chuva em campo, ou mesmo na determinação de parâmetros em laboratório.
Forest litter is the layer above the ground of the forest formed by materials that fall from the vegetation itself. The vegetation materials are through various stages of decomposition, functioning as a mechanism of rainfall interception. Although the interception process is significant in forested areas, this process is usually underestimated or even neglected in hydrological models due to the difficulties on obtaining these data. We proposed the development of a device that allows the field measurements of the forest litter interception in a cerrado sensu stricto area. The Litter Interception Device (LID), was tested and calibrated in the laboratory. We used simulated rainfall with three different intensities to test the device and also three different amounts of litter, 0.100, 0.230 and 0.470 kg. The litter samples used in the tests were taken from an experimental area of cerrado sensu stricto located in Itirapina, State of São Paulo, Brazil. The intensities of simulated rainfall were obtained from an Intensity-Duration-Frequency (IDF) curve made for the experimental area. Besides the LID functioning tests, the device was tested to determine the parameters Cmax and Cmin (maximum capacity and minimum storage capacity, respectively) of the cerrado sensu stricto forest litter. The results showed that the LID allows measurements of the volume of water retained in the forest litter (mm.min-1) as well as its evaporation (mm.min-1). The pluviometer calibration tests revealed that the measurements were always underestimated, requiring a calibration curve (R2 = 0.99) to correct the volume records that flow to the tipping bucket pluviometer. The values found for Cmax (1.0 - 3.07 mm) and Cmin (0.78 - 2.27 mm) are according with those found by other authors for different kinds of forest litters. It was verified that the variation in the amount of forest litter (kg) influenced more in these values, than the rainfall intensity (mm.min-1) . We concluded that the LID can be used in studies that intend to analyze the role of the forest litter in hydrological processes, whether they area for the determination of the interception of rain in the field or even and in laboratory studies to determine interception parameters of forest litter.

APA, Harvard, Vancouver, ISO, and other styles

Qin, Qing. "Effects of Divergent Selection for Insulin-like Growth Factor I (IGF-I) on Mature Weight and Growth Curves in Angus Cattle." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275352602.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "IDF curves"

Garrino, Lorenza, ed. Strumenti per una medicina del nostro tempo. Florence: Firenze University Press, 2015. http://dx.doi.org/10.36253/978-88-6655-837-8.

Full text

Abstract:

Il contributo fornito da questa pubblicazione rappresenta una iniziativa innovativa nell’ambito della formazione per i progetti di miglioramento della qualità delle cure. Nei contesti sempre più si delinea la necessità di modelli teorici, di strumenti e metodologie che favoriscano la compartecipazione della persona e della sua famiglia alle cure. La sinergia tra Medicina narrativa, Metodologia Pedagogia dei Genitori e ICF permette di dare valore alle storie ed alle esperienze dei pazienti, alle competenze educative genitoriali all’interno del patto educativo scuola, sanità e famiglia con un focus sul grado di funzionamento della persona sia essa in condizione di salute o di malattia. In questa nuova prospettiva le azioni di cura mirano a stabilire un rapporto di fiducia che non è più basato su un’adesione acritica a saperi o interventi dati per acquisiti e indiscussi, ma su una concertazione che tiene conto delle competenze situate, concrete e quotidiane del cittadino e delle competenze formalizzate, generali e specifiche dei curanti.

APA, Harvard, Vancouver, ISO, and other styles

Developing Future Projected Intensity-Duration-Frequency (IDF) Curves: A Technical Report on Data, Methods, and IDF Curves for the Chesapeake Bay Watershed and Virginia. RAND Corporation, 2021. http://dx.doi.org/10.7249/tla1365-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Takama, Takeshi, Muhammad Bilal, and K. Srinivasa Raju, eds. Impact of Climate Change on Hydrology and Water Resources. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781789064421.

Full text

Abstract:

Abstract The impact of climate change on water resources is a research area that is gaining prominence, and concerns the prediction of rainfall, temperature, streamflow/discharge, and other meteorological variables. This book is intended to help researchers and other relevant stakeholders working in this area. Its chapters deal with estimation of runoff, floods and droughts, intensity-duration frequency (IDF) curves and evapotranspiration (ET). In addition, some of the miscellaneous topics related to hydrology are also included. In Focus–a book series that showcases the latest accomplishments in water research. Each book focuses on a specialist area with papers from top experts in the field. It aims to be a vehicle for in-depth understanding and inspire further conversations in the sector.

APA, Harvard, Vancouver, ISO, and other styles

Hrushovski, Ehud, and François Loeser. Curves. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691161686.003.0007.

Full text

Abstract:

This chapter proves the iso-definability of unit vector C when C is a curve using Riemann-Roch. Recall that a pro-definable set is called iso-definable if it is isomorphic, as a pro-definable set, to a definable set. If C is an algebraic curve defined over a valued field F, then unit vector C is an iso-definable set. The topology on unit vector C is definably generated, that is, generated by a definable family of (iso)-definable subsets. In other words, there is a definable family giving a pre-basis of the topology. The chapter explains how definable types on C correspond to germs of paths on unit vector C. It also constructs the retraction on skeleta for curves. A key result is the finiteness of forward-branching points.

APA, Harvard, Vancouver, ISO, and other styles

Dean, Richard. Neurodiversity and the Rejection of Cures. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198812876.003.0008.

Full text

Abstract:

The neurodiversity movement emphasizes the idea that autism (and some other neurologically influenced conditions) should not be seen as a medical problem or a defect, but as just an alternative form of neurological organization. A natural corollary of this position is that people with autism do not need to be “cured.” But many members of the general public find it difficult to understand this claim, even if they are receptive to the need for increased acceptance, recognition, and inclusion of people on the autism spectrum. Although this chapter’s tentative conclusions about the rejection of cures for autism are, overall, unsurprisingly moderate, it argues that it is justified for an individual to reject a cure for herself. However, it is much more questionable to demand an end to the search for cures altogether. Along the way the chapter usefully disentangles different lines of argument, and vitiate the force of some of them.

APA, Harvard, Vancouver, ISO, and other styles

Venkat, Bharat Jayram. At the Limits of Cure. Duke University Press, 2021. http://dx.doi.org/10.1215/9781478022022.

Full text

Abstract:

Can a history of cure be more than a history of how disease comes to an end? In 1950s Madras, an international team of researchers demonstrated that antibiotics were effective in treating tuberculosis. But just half a century later, reports out of Mumbai stoked fears about the spread of totally drug-resistant strains of the disease. Had the curable become incurable? Through an anthropological history of tuberculosis treatment in India, Bharat Jayram Venkat examines what it means to be cured, and what it means for a cure to come undone. At the Limits of Cure tells a story that stretches from the colonial period—a time of sanatoria, travel cures, and gold therapy—into a postcolonial present marked by antibiotic miracles and their failures. Venkat juxtaposes the unraveling of cure across a variety of sites: in idyllic hill stations and crowded prisons, aboard ships and on the battlefield, and through research trials and clinical encounters. If cure is frequently taken as an ending (of illness, treatment, and suffering more generally), Venkat provides a foundation for imagining cure otherwise in a world of fading antibiotic efficacy.

APA, Harvard, Vancouver, ISO, and other styles

Baulch, Bob. Poverty Monitoring and Targeting Using ROC Curves: Examples from Vietnam: IDS Working Paper 161. Institute of Development Studies (IDS), 2002.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Quick, Laura. Deuteronomy 28 and Ancient Near Eastern Curses. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198810933.003.0002.

Full text

Abstract:

This chapter reviews previous scholarship pertaining to the composition of Deuteronomy 28 in light of the ancient Near Eastern curse and treaty tradition, and in particular to the Neo-Assyrian text known as ‘Esarhaddon’s Succession Treaties’. The alleged relationship between the curses in Deuteronomy 28 and Esarhaddon’s Succession Treaties is important for the insights it provides concerning the dating and reasons behind the composition of the book of Deuteronomy. However, not all scholars are in agreement concerning the extent of the relationship: whether Deuteronomy 28 is a direct translation of the Succession Treaties, whether it appropriates the Treaties in an act of literary subversion, or even if the two texts are related at all. Since several important Aramaic inscriptions featuring curses have recently come to light, it is suggested that a new investigation of the problem is long overdue.

APA, Harvard, Vancouver, ISO, and other styles

Attanasio, John. Income and Wealth Disparities, and the Demand Curve. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190847029.003.0011.

Full text

Abstract:

The Federal Reserve Bank in May 2016, reported “median family income is in the range between $40,000 and $49,999.” The middle class is shrinking. Income and wealth inequalities are hitting the demand curve causing anemic growth and more frequent, severe economic downturns. In 2011–2012, corporate profits had risen to constitute their largest share of the economy since 1929. The campaign finance cases and the increase in income inequality also appear highly correlated with a steep increase in government deficits and national debt. The logical implication of this work is that democracy may be necessary to establish, or sustain, capitalism. If political power becomes concentrated in relatively few people, then economic power will likely become similarly concentrated: oligarchy will lead to oligopoly. If democracy is necessary to obtain sustained capitalism, and if distributive autonomy is necessary to sustain democracy, it would appear that distributive autonomy is necessary to sustain capitalism.

APA, Harvard, Vancouver, ISO, and other styles

Tretkoff, Paula. Line Arrangements in P2(C) and Their Finite Covers. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691144771.003.0006.

Full text

Abstract:

This chapter discusses the free 2-ball quotients arising as finite covers of the projective plane branched along line arrangements. It first considers a surface X obtained by blowing up the singular intersection points of a linear arrangement in the complex projective plane, as well as a smooth compact complex surface Y that is a finite covering of X. If Y is of general type with vanishing proportionality deviation, then it is a free 2-ball quotient. The chapter then looks at line arrangements that have equal ramification indices along each of the proper transforms of the original lines, along with cases of blowing down rational curves and removing elliptic curves. It also enumerates all possibilities for the assigned weights of the arrangements, under the assumption that divisors of negative or infinite weight on the blown-up line arrangements do not intersect.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "IDF curves"

Al-Wagdany, A. S. "Sensitivity of IDF Curves to Rainfall Gauge Type." In Patterns and Mechanisms of Climate, Paleoclimate and Paleoenvironmental Changes from Low-Latitude Regions, 99–102. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01599-2_23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Mamoon, Abdullah Al, Ataur Rahman, and Niels E. Joergensen. "Assessment of Climate Change Impacts on IDF Curves in Qatar Using Ensemble Climate Modeling Approach." In Springer Water, 153–69. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02197-9_7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Peruš, Iztok, Robert Klinc, Matevž Dolenc, and Matjaž Dolšek. "Innovative Computing Environment for Fast and Accurate Prediction of Approximate IDA Curves." In Computational Methods in Applied Sciences, 259–72. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6573-3_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Chali, Wagari Ejigu, Brijesh Kumar, and Dipankar Roy. "Development of Intensity–Duration–Frequency (IDF) Curve for Extreme Flood Evaluation for Holeta Town, Ethiopia." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (3rd Edition), 701–3. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-43922-3_157.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Rodríguez-Otero, Paula, and Jesús F. San Miguel. "Post-CAR-T Cell Therapy (Consolidation and Relapse): Multiple Myeloma." In The EBMT/EHA CAR-T Cell Handbook, 173–76. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94353-0_34.

Full text

Abstract:

AbstractAdoptive cell therapy with BCMA-directed autologous CAR-T cells has shown very encouraging results in end-stage relapse and refractory multiple myeloma (MM), with overall response rates ranging between 73% and 96.9%, complete response (CR) rates between 33% and 67.9%, and MRD negativity in 50–74% of patients in the two largest phase 2 studies of ide-cel (idecabtagene autoleucel, KarMMa) and cilta-cel (ciltacabtagene autoleucel, CARTITUDE 1) reported thus far (Madduri et al. 2020; Munshi et al. 2021). Unfortunately, responses are usually not maintained, and no plateau has yet been seen in the survival curves. The median progression-free survival (PFS) in the KarMMa study of ide-cel was 8.8 months (95% CI, 5.6–11.6) among all 128 patients infused, increased to 12.1 months (95% CI, 8.8–12.3) among patients receiving the highest dose (450 × 106 CAR + T cells) and increased to 20.2 months (95% CI, 12.3–NE) among those achieving a CR. In the CARTITUDE-1 study, with a median follow-up of 12.4 months, the median PFS has not yet been reached, and the 12-month PFS rate was 76.6% (95% CI; 66.0–84.3). The absence of a clear plateau in PFS differs from what has been observed in DLBCL or B-ALL with currently approved CD-19-directed CAR-T cells, where (albeit with a shorter PFS and lower rates of CR) patients remaining free from relapse beyond 6 months are likely to enjoy prolonged disease control or even be cured.

APA, Harvard, Vancouver, ISO, and other styles

Vennekens, Joost. "Lowering the Learning Curve for Declarative Programming: A Python API for the IDP System." In Practical Aspects of Declarative Languages, 86–102. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-51676-9_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

"7.7 The Construction of IDF Curves." In Hydrology, 158–60. CRC Press, 2010. http://dx.doi.org/10.1201/b10426-38.

Full text

APA, Harvard, Vancouver, ISO, and other styles

"7.5 IDF (Intensity-Duration-Frequency) Curves." In Hydrology, 157. CRC Press, 2010. http://dx.doi.org/10.1201/b10426-37.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Tayşi, H., and M. Özger. "Disaggregation of future GCMs to generate IDF curves for the assessment of urban floods." In Impact of Climate Change on Hydrology and Water Resources. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781789064421_ch22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Jamil, Rehan. "GIS-Based Watershed Analysis for Water Storage Facilities in Underdeveloped Areas." In Handbook of Research on Driving Transformational Change in the Digital Built Environment, 164–78. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6600-8.ch007.

Full text

Abstract:

Digital elevation models (DEMs) are created to study the topography of the area by using point krigging method of gridding. The results show a significant level difference between the start and end points of the valley sloping naturally. A longitudinal profile shows an average slope of 2.6% in a stretch of 15 km inside the area under study. Later, the detailed watershed and runoff analysis have been performed by preparing various maps using IDF curves available for the area. The area is found to experience sufficient rainfall for a 50 to 100-year storm return period. The expected location and amount of runoff water accumulation have also been determined which may help for the construction of water storage or rainwater harvesting facilities. The chapter shows the role of GIS-based techniques for the hydrological analysis of difficult terrains which can be applied for planning and management of water storage facilities in underdeveloped areas.

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "IDF curves"

Singh, Vijay P., and Zengchao Hao. "Entropy-Based Probability Distribution for IDF Curves." In World Environmental and Water Resources Congress 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41173(414)131.

Full text

APA, Harvard, Vancouver, ISO, and other styles

S Imran Ahmed, R.P Rudra, B Gharabaghi, and J Pedikaris. "Change in IDF curves for a River basin in southern Ontario." In 2007 Minneapolis, Minnesota, June 17-20, 2007. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2007. http://dx.doi.org/10.13031/2013.23207.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Sherif, Mohsen, Rezaul Chowdhury, and Ampar Shetty. "Rainfall and Intensity-Duration-Frequency (IDF) Curves in the United Arab Emirates." In World Environmental and Water Resources Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413548.231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Lucantonio, Mara, Benedetta Moccia, Claudia Bertini, Luca Buonora, and Francesco Napolitano. "Climate corrected intensity-duration-frequency (IDF) curves: A case study in Rome, Italy." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2021. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0163789.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Kim, Taesoon, Ju-Young Shin, Kewtae Kim, and Jun-Haeng Heo. "Improving Accuracy of IDF Curves Using Long- and Short-Duration Separation and Multi-Objective Genetic Algorithm." In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)128.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Nguyen, Van-Thanh-Van. "Development of New Methods for Updating IDF Curves in Canada in the Context of Climate Change." In World Environmental and Water Resources Congress 2020. Reston, VA: American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482964.019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Almahrouqi, Sabah. "Extreme Precipitation Analysis and Updated Intensity-Duration-Frequency (IDF) Curves over MENA Region under Future Climate Scenarios." In Proceedings of the 39th IAHR World Congress From Snow to Sea. Spain: International Association for Hydro-Environment Engineering and Research (IAHR), 2022. http://dx.doi.org/10.3850/iahr-39wc2521711920221240.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Gao, Peng, and Gregory J. Carbone. "THE INFLUENCE AND IMPLICATIONS OF A SINGLE EXTREME EVENT ON INTENSITY-DURATION-FREQUENCY (IDF) CURVES IN SOUTH CAROLINA." In 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273786.

Full text

APA, Harvard, Vancouver, ISO, and other styles

"Assessment of projected change in Intensity-duration-frequency (IDF) curves for Southeastern, United States using Artificial Neural Networks." In 2022 ASABE Annual International Meeting, July 17-20, 2022. American Society of Agricultural and Biological Engineers, 2022. http://dx.doi.org/10.13031/aim.202200175.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Mathasoliya, Nayana D., and Sanskriti S. Mujumdar. "Verification of Discharge Carrying Capacity of Existing Stormwater Drain Using New IDF Curves—A Case Study of Vadodara Airport." In ASCE India Conference 2017. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784482032.069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "IDF curves"

Budzich, Jeffrey. PR-685-184506-R03 Monitoring Techniques For Determining Critical Return Period Flood Alert Triggers. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2020. http://dx.doi.org/10.55274/r0011667.

Full text

Abstract:

This document provides a summary of developing regional rainfall intensity-duration-frequency (IDF) curves for determining critical return period alert triggers, and compare with pipeline operator-specific QPE monitoring locations for known crossings of potential concern. These IDF curves aid in determining the rainfall depth that has accumulated within a specified period of time. One example of a trigger alert requested by a pipeline operator might be the 100-year return period rainfall at a location upstream of their pipeline crossing in a small watershed.

APA, Harvard, Vancouver, ISO, and other styles

Wagner, Anna, Christopher Hiemstra, Glen Liston, Katrina Bennett, Dan Cooley, and Arthur Gelvin. Changes in climate and its effect on timing of snowmelt and intensity-duration-frequency curves. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41402.

Full text

Abstract:

Snow is a critical water resource for much of the U.S. and failure to account for changes in climate could deleteriously impact military assets. In this study, we produced historical and future snow trends through modeling at three military sites (in Washington, Colorado, and North Dakota) and the Western U.S. For selected rivers, we performed seasonal trend analysis of discharge extremes. We calculated flood frequency curves and estimated the probability of occurrence of future annual maximum daily rainfall depths. Additionally, we generated intensity-duration-frequency curves (IDF) to find rainfall intensities at several return levels. Generally, our results showed a decreasing trend in historical and future snow duration, rain-on-snow events, and snowmelt runoff. This decreasing trend in snowpack could reduce water resources. A statistically significant increase in maximum streamflow for most rivers at the Washington and North Dakota sites occurred for several months of the year. In Colorado, only a few months indicated such an increase. Future IDF curves for Colorado and North Dakota indicated a slight increase in rainfall intensity whereas the Washington site had about a twofold increase. This increase in rainfall intensity could result in major flood events, demonstrating the importance of accounting for climate changes in infrastructure planning.

APA, Harvard, Vancouver, ISO, and other styles

Lozada, Gabriel A. The Perils of Antitrust Econometrics: Unrealistic Engel Curves, Inadequate Data, and Aggregation Bias. Institute for New Economic Thinking Working Paper Series, May 2023. http://dx.doi.org/10.36687/inetwp203.

Full text

Abstract:

Some economists argue antitrust policy should be based on empirical methods used by the Industrial Organization subdiscipline of economics, but non-economists must understand that those methods contain certain highly restrictive assumptions. Those assumptions involve econometric “identification,” and treating aggregate demand as if it were generated by a representative consumer (Muellbauer’s “generalized linear” preferences). We derive new results illustrating how restrictive the representative consumer assumption is; we explain aggregation bias in Almost Ideal Demand System models; and we show that data limitations make it even harder to justify economists’ restricting aggregate demands as one would the demand of a single individual.

APA, Harvard, Vancouver, ISO, and other styles

Shim, D. J., Gery Wilkowski, Mohammed Uddin, Sureshkumar Kalyanam, and P. Mincer. PR-276-094509-R01 Develop Fracture Initiation Criteria for High-Strength Steel Line Pipe Phase II. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2013. http://dx.doi.org/10.55274/r0010072.

Full text

Abstract:

This report summarizes the major findings from a PRCI Project on developing fracture initiation criteria for axial flaws (both through-wall and surface flaws) in high-strength line-pipe materials. This work was originally done on the basis to see if improvements were needed for higher-grade steels, but interestingly there were several outcomes that affect predictions for all piping steels. One of the outcomes of this work is a new correlation between Charpy USE and J-R curve for high-strength materials. Although it is based on limited data, it was demonstrated that there is significant difference compared to the existing correlation. Another interesting finding is the effect of the internal patch on burst pressure of axial through-wall-cracked pipe test. Careful experimental and detailed finite element analyses showed patching affects burst pressure by at least 10-percent which affects the leak-rupture boundary. For axial surface-cracked pipes, the effect of crack shape on the crack-driving force was investigated. Finally, it was demonstrated that the actual axial surface-cracked pipe bulging factor is considerably lower than bulging factor empirically derived at Battelle in the 1970s. If past bulging factor is used for subcritical crack growth (e.g., for SCC or fatigue analyses), the crack growth and start of ductile tearing can be significantly overpredicted. Overall, J-T analysis provided the most accurate results when proper crack-driving forces and J-R curves were used (both for axial through-wall-cracked pipe and axial surface-cracked pipe). This report also includes recommendations for future work.

APA, Harvard, Vancouver, ISO, and other styles

Carlsson, Mikael, Julián Messina, and Oskar Nordström Skans. Firm-Level Shocks and Labor Flows. Inter-American Development Bank, January 2021. http://dx.doi.org/10.18235/0003002.

Full text

Abstract:

This paper analyzes how labor ows respond to permanent idiosyncratic shifts in rm-level production functions and demand curves using very detailed Swedish micro data. Shocks to rms physical productivity have only modest eects on rm-level employment decisions. In contrast, the paper documents rapid and substantial employment adjustments through hires and separations in response to rm-level demand shocks. The choice of adjustment margin depends on the sign of the shock: rms adjust through increased hires if these shocks are positive and through increased separations if the shocks are negative.

APA, Harvard, Vancouver, ISO, and other styles

Carlsson, Mikael, Julián Messina, and Oskar Nordström Skans. Firm-Level Shocks and Labor Flows. Inter-American Development Bank, January 2021. http://dx.doi.org/10.18235/0003002.

Full text

Abstract:

APA, Harvard, Vancouver, ISO, and other styles

Cunha, Daniel, Giovana Craveiro, and Marina Rossi. The Impact of the Creation of a Sovereign ESG Reference Yield Curve on Corporate ESG Bonds Issuances from Latin American and Caribbean. Inter-American Development Bank, March 2024. http://dx.doi.org/10.18235/0012859.

Full text

Abstract:

This paper explores a granular database from the Inter-American Development Bank (IDB) Green Bond Transparency Platform covering the issuance of 430 corporate and sovereign Environmental, Social, and Governance (ESG) bonds in Latin America and the Caribbean (LAC) that are outstanding in international markets. The goal was to investigate how the creation of a sovereign ESG reference yield curve can boost the private ESG bond market. Using a difference-in-differences (DID) approach, we empirically estimate that the creation of a sovereign ESG reference curve roughly leads to a 60 percent increase in the volume of corporate bond issuances and a 25 percent increase in the number of ESG corporate bond issuances in the external markets after three years. On the mechanisms, we argue that the sovereign ESG reference yield curve works as a benchmark for private sector ESG bond issuers by providing a standard against which the performance of ESG bonds can be measured.

APA, Harvard, Vancouver, ISO, and other styles

Hutchison, Michael. A Cure Worse Than the Disease? Currency Crises and the Output Costs of IMF-Supported Stabilization Programs. Cambridge, MA: National Bureau of Economic Research, May 2001. http://dx.doi.org/10.3386/w8305.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Álvarez, Carola, Jacqueline Bueso-Merriam, and Rodolfo Stucchi. So you think you know what drives disbursements at the IDB? Think, think again... Inter-American Development Bank, December 2012. http://dx.doi.org/10.18235/0009059.

Full text

Abstract:

This paper focuses on the performance of IDB projects between 1996 and 2011 disbursements. We present evidence on the evolution of disbursements with respect to the available funds and the evolution of disbursements with respect to the historic disbursement curve of IDB projects. We also identify the main factors driving disbursements. Our findings show that disbursements improved in the last 10 years; in particular, they improved after the organizational changes instituted after 2006. With respect to the factors driving disbursements, we find that: (i) Country is more important than sector in understanding performance. (ii) Most of the remaining variance in project performance can be explained by variance within each country. (iii) The team leader plays an important role in understanding project performance. (iv) The effect of team leader location on disbursement performance has not been constant over time. The effect is negative for projects approved after 1996. However, if we focus on projects approved after 2009 the effect is positive. This result also provides evidence on the success of the organizational changes undertaken after 2006. (v) Projects that underwent a change in team leader show an improvement in performance after one year of the change. (vi) Team leader characteristics related to the experience or seniority of the team leader are non-significant, though in the expected direction. Team leader may be pointing to other non-observable characteristics of the individual or characteristics of the larger team that supports that team leader in execution and supervision of the project.The effect of team leader location on disbursement performance has not been constant over time. The effect is negative for projects approved after 1996. However, if we focus on projects approved after 2009 the effect is positive. This result also provides evidence on the success of the organizational changes undertaken after 2006. (v) Projects that underwent a change in team leader show an improvement in performance after one year of the change. (vi) Team leader characteristics related to the experience or seniority of the team leader are non-significant, though in the expected direction. Team leader may be pointing to other non-observable characteristics of the individual or characteristics of the larger team that supports that team leader in execution and supervision of the project.

APA, Harvard, Vancouver, ISO, and other styles

Lee, Chung. Immune Cells, if Rendered Insensitive to Transforming Growth Factorbeta, Can Cure Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, February 2007. http://dx.doi.org/10.21236/ada463756.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

Contents

Academic literature on the topic 'IDF curves'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Journal articles on the topic "IDF curves"

Dissertations / Theses on the topic "IDF curves"

Books on the topic "IDF curves"

Book chapters on the topic "IDF curves"

Conference papers on the topic "IDF curves"

Reports on the topic "IDF curves"