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Articoli di riviste sul tema "Hydrology Mathematical models"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 29 gennaio 2023

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1

Mulla, D. J. "Mathematical Models of Small Watershed Hydrology and Applications." Journal of Environmental Quality 32, no. 1 (January 2003): 374. http://dx.doi.org/10.2134/jeq2003.374a.

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Sawada, Yohei, and Risa Hanazaki. "Socio-hydrological data assimilation: analyzing human–flood interactions by model–data integration." Hydrology and Earth System Sciences 24, no. 10 (October 5, 2020): 4777–91. http://dx.doi.org/10.5194/hess-24-4777-2020.

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Abstract. In socio-hydrology, human–water interactions are simulated by mathematical models. Although the integration of these socio-hydrological models and observation data is necessary for improving the understanding of human–water interactions, the methodological development of the model–data integration in socio-hydrology is in its infancy. Here we propose applying sequential data assimilation, which has been widely used in geoscience, to a socio-hydrological model. We developed particle filtering for a widely adopted flood risk model and performed an idealized observation system simulatio

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Milks, Robert R., William C. Fonteno, and Roy A. Larson. "Hydrology of Horticultural Substrates: I. Mathematical Models for Moisture Characteristics of Horticultural Container Media." Journal of the American Society for Horticultural Science 114, no. 1 (January 1989): 48–52. http://dx.doi.org/10.21273/jashs.114.1.48.

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Abstract Moisture retention data were collected for five porous materials: soil, phenolic foam, and three combinations of commonly used media components. Two mathematical functions were evaluated for their ability to describe the water content–soil moisture relationship. A cubic polynomial function with linear parameters previously used on container media was compared to a closed-form nonlinear parameter model developed to describe water conductivity in mineral soils. In most tests for precision, adequacy, accuracy, and validation, the nonlinear function was superior to the simpler power serie

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4

Mańko, Robert, and Norbert Laskowski. "Comparative analysis of the effectiveness of the conceptual rainfall-runoff hydrological models on the selected rivers in Odra and Vistula basins." ITM Web of Conferences 23 (2018): 00025. http://dx.doi.org/10.1051/itmconf/20182300025.

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Identification of physical processes occurred in the watershed is one of the main tasks in hydrology. Currently the most efficient hydrological processes describing and forecasting tool are mathematical models. They can be defined as a mathematical description of relations between specified attributes of analysed object. It can be presented by: graphs, arrays, equations describing functioning of the object etc. With reference to watershed a mathematical model is commonly defined as a mathematical and logical relations, which evaluate quantitative dependencies between runoff characteristics and

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5

Sun, Si Miao, Chang Lei Dai, Hou Chu Liao, and Di Fang Xiao. "A Conceptual Model of Soil Moisture Movement in Seasonal Frozen Unsaturated Zone." Applied Mechanics and Materials 90-93 (September 2011): 2612–18. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2612.

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Conceptual model is considered as one of the crucial and essential methods for scientific research on cold region hydrology. However, graphical conceptual model that integrates with a variety of influencing factors and specializes in describing soil moisture dynamic in seasonal frozen unsaturated zone has never occurred in any related researches, due to which the study on mechanism of frozen soil moisture movement has been delayed in a certain degree. Firstly, three stages of freezing and thawing process are divided in this article to serve for the further study in seasonal frozen unsaturated

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Ponnambalam, Kumaraswamy, and S. Jamshid Mousavi. "CHNS Modeling for Study and Management of Human–Water Interactions at Multiple Scales." Water 12, no. 6 (June 14, 2020): 1699. http://dx.doi.org/10.3390/w12061699.

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This paper presents basic definitions and challenges/opportunities from different perspectives to study and control water cycle impacts on society and vice versa. The wider and increased interactions and their consequences such as global warming and climate change, and the role of complex institutional- and governance-related socioeconomic-environmental issues bring forth new challenges. Hydrology and integrated water resources management (IWRM from the viewpoint of an engineering planner) do not exclude in their scopes the study of the impact of changes in global hydrology from societal actio

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7

Vieux, Baxter E. "Review of Mathematical Models of Large Watershed Hydrology by Vijay P. Singh and Donald K. Prevert." Journal of Hydraulic Engineering 130, no. 1 (January 2004): 89–90. http://dx.doi.org/10.1061/(asce)0733-9429(2004)130:1(89).

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8

Paz Pellat, Fernando, Jaime Garatuza Payán, Víctor Salas Aguilar, Alma Socorro Velázquez Rodríguez, and Martín Alejandro Bolaños González. "Budyko-Type Models and the Proportionality Hypothesis in Long-Term Water and Energy Balances." Water 14, no. 20 (October 20, 2022): 3315. http://dx.doi.org/10.3390/w14203315.

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In the perspective of Darwinian hydrology, Budyko hypotheses can be the foundation of approaches for developing models. Numerous Budyko-type models meeting established boundary conditions (water and energy limits) have been developed based on the Budyko hypothesis on the long-term-average annual mass and energy balance. Some of these models are grounded on empirical bases, while others have been formulated on sophisticated mathematical developments. We analyze the basic hypotheses underlying some Budyko-type models; we first describe some published models and then examine their underlying hypo

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Rezaie-Balf, Mohammad, and Ozgur Kisi. "New formulation for forecasting streamflow: evolutionary polynomial regression vs. extreme learning machine." Hydrology Research 49, no. 3 (March 27, 2017): 939–53. http://dx.doi.org/10.2166/nh.2017.283.

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Abstract Streamflow forecasting is crucial in hydrology and hydraulic engineering since it is capable of optimizing water resource systems or planning future expansion. This study investigated the performances of three different soft computing methods, multilayer perceptron neural network (MLPNN), optimally pruned extreme learning machine (OP-ELM), and evolutionary polynomial regression (EPR) in forecasting daily streamflow. Data from three different stations, Soleyman Tange, Perorich Abad, and Ali Abad located on the Tajan River of Iran were used to estimate the daily streamflow. MLPNN model

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Kinar, Nicholas J. "Introducing electronic circuits and hydrological models to postsecondary physical geography and environmental science students: systems science, circuit theory, construction, and calibration." Geoscience Communication 4, no. 2 (April 13, 2021): 209–31. http://dx.doi.org/10.5194/gc-4-209-2021.

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Abstract. A classroom activity involving the construction, calibration, and testing of electronic circuits was introduced to an advanced hydrology class at the postsecondary level. Two circuits were constructed by students: (1) a water detection circuit and (2) a hybrid relative humidity (RH)/air temperature sensor and pyranometer. The circuits motivated concepts of systems science, modelling in hydrology, and model calibration. Students used the circuits to collect data useful for providing inputs to mathematical models of hydrological processes. Each student was given the opportunity to crea

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Morbidelli, Renato, Corrado Corradini, Carla Saltalippi, Alessia Flammini, Jacopo Dari, and Rao Govindaraju. "Rainfall Infiltration Modeling: A Review." Water 10, no. 12 (December 18, 2018): 1873. http://dx.doi.org/10.3390/w10121873.

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Infiltration of water into soil is a key process in various fields, including hydrology, hydraulic works, agriculture, and transport of pollutants. Depending upon rainfall and soil characteristics as well as from initial and very complex boundary conditions, an exhaustive understanding of infiltration and its mathematical representation can be challenging. During the last decades, significant research effort has been expended to enhance the seminal contributions of Green, Ampt, Horton, Philip, Brutsaert, Parlange and many other scientists. This review paper retraces some important milestones t

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Garbrecht, Jurgen D. "Review of Mathematical Models of Small Watershed Hydrology and Applications by Vijay P. Singh and Donald K. Frevert." Journal of Hydraulic Engineering 129, no. 7 (July 2003): 558–59. http://dx.doi.org/10.1061/(asce)0733-9429(2003)129:7(558).

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Jocea, Andreea Florina, E. G. Crăciun, and A. Anton. "Approximation Of Scours Using Terrestrial 3D Laser Scanning." Journal of Applied Engineering Sciences 5, no. 1 (May 1, 2015): 31–36. http://dx.doi.org/10.1515/jaes-2015-0004.

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Abstract In designing artwork as bridges, hydraulic calculations have a very important role due to the fact that they are behind their sizing. Bridge designer must therefore possess knowledge of hydrology, hydraulics of bridges and river banks regularization. A problem that arises during the design stage of bridges is the scour phenomenon surrounding bridge pier. Over time, there have been conducted a number of studies which led to the provision of a plurality of mathematical models that are intended scour prediction. In the present article we will present an experimental study to determine th

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14

Chipepa, Fastel, Thatayaone Moakofi, and Broderick Oluyede. "Marshall-Olkin-Odd Power Generalized Weibull-G Family of Distributions with Applications of COVID-19 Data." Journal of Probability and Statistical Science 20, no. 1 (October 3, 2022): 1–20. http://dx.doi.org/10.37119/jpss2022.v20i1.509.

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Attempts have been made to define new families of distributions that provide more flexibility for modelling data that is skewed in nature. In this work, we propose a new family of distributions called Marshall-Olkin-odd power generalized Weibull (MO-OPGW-G) distribution based on the generator pioneered by Marshall and Olkin [20]. This new family of distributions allows for a flexible fit to real data from several fields, such as engineering, hydrology and survival analysis. The mathematical and statistical properties of these distributions are studied and its model parameters are obtained thro

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15

ALI MUNZER, SULEIMAN, D. S. BEGLYAROV, and R. R. SHAKIROV. "FEATURES AND ANALYSIS OF STUDIES OF FISH PROTECTION COMPLEX FOR WATER RECEIVERS OF LARGE HIGH-PRESSURE HYDROELECTRIC POWER PLANTS." Prirodoobustrojstvo, no. 2 (2022): 86–93. http://dx.doi.org/10.26897/1997-6011-2022-2-86-93.

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Development of effective fish protection measures at water intakes is one of the main directions of fish resources conservation and reproduction in inland water bodies of the country. Its complexity is associated with the involvement of many related disciplines: ichthyology, physiology, hydrobiology, ecology, hydraulics, hydrology, etc. In the process of solving the problem of standardization of information to be used for creating mathematical models for forecasting potential impact of water intakes with fish protection on aquatic ecosystem. The article gives a review of the research on the te

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Wetter, Oliver. "The potential of historical hydrology in Switzerland." Hydrology and Earth System Sciences 21, no. 11 (November 23, 2017): 5781–803. http://dx.doi.org/10.5194/hess-21-5781-2017.

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Abstract. Historical hydrology is based on data derived from historical written, pictorial and epigraphic documentary sources. It lies at the interface between hydrology and environmental history, using methodologies from both disciplines basically with the goal of significantly extending the instrumental measurement period with experience from the pre-instrumental past. Recently this field of research has gained increased recognition as a tool to improve current flood risk estimations when EU guidelines regulated by law the quantitative consideration of previous floods.1 Awareness to consider

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Shein, Ye V., A. G. Bolotov, and A. V. Dembovetskii. "Soil Hydrology of Agricultural Landscapes: Quantitative Description, Research Methods, and Availability of Soil Water." Eurasian Soil Science 54, no. 9 (September 2021): 1367–74. http://dx.doi.org/10.1134/s1064229321090076.

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Abstract Soil hydrology has deep Russian roots, which are primarily related to the theory of soil hydrological constants and their practical application. These constants have been used to assess the hydrological soil conditions in stationary observations, for which attempts to arrange regular hydrological observations in the landscape faced impracticable complexity of work and calculations and provided unreliable quantitative predictions. At present, there are new opportunities for experimental research, digital analysis, and prediction of hydrological indicators of soils in the landscape. A n

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18

Genuchten, Martinus Th van, Feike J. Leij, Todd H. Skaggs, Nobuo Toride, Scott A. Bradford, and Elizabeth M. Pontedeiro. "Exact analytical solutions for contaminant transport in rivers 1. The equilibrium advection-dispersion equation." Journal of Hydrology and Hydromechanics 61, no. 2 (June 1, 2013): 146–60. http://dx.doi.org/10.2478/johh-2013-0020.

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Abstract Analytical solutions of the advection-dispersion equation and related models are indispensable for predicting or analyzing contaminant transport processes in streams and rivers, as well as in other surface water bodies. Many useful analytical solutions originated in disciplines other than surface-water hydrology, are scattered across the literature, and not always well known. In this two-part series we provide a discussion of the advection-dispersion equation and related models for predicting concentration distributions as a function of time and distance, and compile in one place a la

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Belvederesi, Chiara, Mohamed S. Zaghloul, Gopal Achari, Anil Gupta, and Quazi K. Hassan. "Modelling river flow in cold and ungauged regions: a review of the purposes, methods, and challenges." Environmental Reviews 30, no. 1 (March 2022): 159–73. http://dx.doi.org/10.1139/er-2021-0043.

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River flow forecasting models assist in the understanding, predicting, monitoring, and managing of issues related to surface-water resources, such as water quality deterioration and flooding, or developing adaptation strategies to cope with climate change and increasing water demand. This review presents an overview of the current research status and progress in river-flow forecasting, focusing on cold climates and ungauged locations. River-flow forecasting in cold regions represents a challenge because the natural processes that occur within catchments vary greatly both seasonally and annuall

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Rosso, R., M. C. Rulli, and D. Bocchiola. "Transient catchment hydrology after wildfires in a Mediterranean basin: runoff, sediment and woody debris." Hydrology and Earth System Sciences 11, no. 1 (January 17, 2007): 125–40. http://dx.doi.org/10.5194/hess-11-125-2007.

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Abstract. The transient effect of forest fires on runoff, erosion and yield of woody biomass has been investigated by combining the experimental approach with mathematical models of hydrological processes. The case study is the Branega creek in Liguria, Italy, where a forest fire in August 2003 caused substantial changes to soil and vegetation, and left a considerable amount of woody debris on the ground. Immediately after the fire, rainfall simulator experiments in adjacent burned and unburned plots showed the extent to which fire had increased runoff and erosion rates. A distributed hydrolog

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Dinu, Cristian, Radu Drobot, Claudiu Pricop, and Tudor Viorel Blidaru. "Genetic Programming Technique Applied for Flash-Flood Modelling Using Radar Rainfall Estimates." Mathematical Modelling in Civil Engineering 13, no. 4 (December 20, 2017): 27–38. http://dx.doi.org/10.1515/mmce-2017-0012.

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AbstractThe rainfall-runoff transformation is a highly complex dynamic process and the development of fast and robust modelling instruments has always been one of the most important topics for hydrology. Over time, a significant number of hydrological models have been developed with a clear trend towards a process-based approach. The downside of these types of models is the significant amount of data required for building the model and for the calibration process: in practice, the collection of all necessary data for such models proves to be a difficult task. In order to cope with this issue,

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Abreu, Marcel Carvalho, Roberto Avelino Cecílio, Sidney Sara Zanetti, and Cecília Neves Catrinck. "ESTIMATIVA DA PRECIPITAÇÃO NO ESPÍRITO SANTO POR INTERMÉDIO DE REGRESSÃO POLINOMIAL." Nativa 7, no. 2 (March 11, 2019): 174. http://dx.doi.org/10.31413/nativa.v7i2.6169.

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A precipitação é um dos principais elementos da hidrologia, sendo uma variável de grande importância para a compreensão da dinâmica do ciclo hidrológico. Apesar da sua importância, a disponibilidade de dados hidroclimáticos é baixa. Dentre as alternativas para suprir a necessidade de informações da precipitação, a modelagem matemática é uma importante ferramenta que visa e sua estimativa. Assim, este trabalho avaliou as precipitações mensais e anuais de 110 estações pluviométricas do estado do Espírito Santo e avaliou o ajuste de modelos polinomiais de ordem 1 a 4 utilizando a longitude, latit

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Deumlich, D., A. Jha, and G. Kirchner. "Comparing measurements, ⁷Be radiotracer technique and process-based erosion model for estimating short-term soil loss from cultivated land in Northern Germany." Soil and Water Research 12, No. 3 (June 28, 2017): 177–86. http://dx.doi.org/10.17221/124/2016-swr.

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Due to changing climate and irregular weather patterns, event-based soil loss and sediment yield have become important issues in the agricultural areas. Several mathematical models and prediction methodologies have been used to estimate event-based soil loss and soil redistribution based on soil types, land management, hydrology and local topography. The use of short-lived beryllium-7 as a means of estimating event-based soil erosion/deposition rates has become an alternative to the traditional soil loss measurement methods. A new erosion model taking into account the movement of <sup>7&

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Gautam, Narayan Prasad. "Flow routing with Semi-distributed hydrological model HEC- HMS in case of Narayani River Basin." Journal of the Institute of Engineering 10, no. 1 (July 31, 2014): 45–58. http://dx.doi.org/10.3126/jie.v10i1.10877.

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Routing is the modeling process to determine the outflow at an outlet from given inflow at upstream of the channel. A hydrological simulation model use mathematical equations that establish relationships between inputs and outputs of water system and simulates the catchment response to the rainfall input. Several hydrological models have been developed to assist in understanding of hydrologic system and water resources management. A model, once calibrated and verified on catchments, provides a multi-purpose tool for further analysis. Semi-Distributed models in hydrology are usually physically

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James, William, and Boregowda Shivalingaiah. "Storm water pollution modelling: buildup of dust and dirt on surfaces subject to runoff." Canadian Journal of Civil Engineering 12, no. 4 (December 1, 1985): 906–15. http://dx.doi.org/10.1139/l85-103.

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Many runoff models are currently in use to predict both the quantity and quality of storm water runoff. In most models, the quality algorithms need further development to gain the confidence of model users. The writers have attempted to disaggregate the accumulation process and to develop improved algorithms for pollutant buildup. The factors and processes that affect buildup include atmospheric dustfall due to plumes of dust-laden air, wind effects, vehicles, intentional removals (e.g., street cleaning), special activities (such as construction and demolition), biological decomposition, and p

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Zhu, D., and I. D. Cluckie. "A preliminary appraisal of Thurnham dual polarisation radar in the context of hydrological modelling structure." Hydrology Research 43, no. 5 (May 3, 2012): 736–52. http://dx.doi.org/10.2166/nh.2012.023.

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The Thurnham radar is a prototype of a potential operational C-Band dual-polarisation weather radar designed specifically for the measurement of rainfall. It is also designed to increase the radar coverage over London when operating as a conventional C-Band radar as a direct consequence of the Lewes floods of October 2000. Dual-polarisation processing is expected to provide improved estimation of rainfall rates, especially at higher intensities, in terms of clutter removal, attenuation correction and rainfall estimation. In this study, three hydrological models with different mathematical stru

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Iqbal, Muhammad Zafar, Muhammad Zeshan Arshad, Gamze Özel, and Oluwafemi Samson Balogun. "A better approach to discuss medical science and engineering data with a modified Lehmann Type – II model." F1000Research 10 (August 17, 2021): 823. http://dx.doi.org/10.12688/f1000research.54305.1.

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Background: Modeling with the complex random phenomena that are frequently observed in reliability engineering, hydrology, ecology, medical science, and agricultural sciences was once thought to be an enigma. Scientists and practitioners agree that an appropriate but simple model is the best choice for this investigation. To address these issues, scientists have previously discussed a variety of bounded and unbounded, simple to complex lifetime models. Methods: We discussed a modified Lehmann type II (ML-II) model as a better approach to modeling bathtub-shaped and asymmetric random phenomena.

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Sebayang, Ika Sari Damayanthi, and Muhammad Fahmia. "Dependable flow modeling in upper basin Citarum using multilayer perceptron backpropagation." International Journal of Artificial Intelligence Research 4, no. 2 (January 5, 2021): 75. http://dx.doi.org/10.29099/ijair.v4i2.174.

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To determine the amount of dependable flow, a hydrological approach is needed where changes in rainfall become runoff. This diversification is a very complex hydrological phenomenon. Where this is a nonlinear process, with time changing and distributed separately. To approach this phenomenon, an analysis of the hydrological system has been developed using a model which is a simplification of the actual natural variables. The model is formed by a set of mathematical equations that reflect the behavior of parameters in hydrology. Modeling in this case uses artificial neural networks, multilayer

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Macías Barberán, José Ricardo, Gerardo José Cuenca Nevárez, Frank Guillermo Intriago Flor, Creuci Maria Caetano, Juan Carlos Menjivar Flores, and Henry Antonio Pacheco Gil. "Vulnerability to climate change of smallholder cocoa producers in the province of Manabí, Ecuador." Revista Facultad Nacional de Agronomía Medellín 72, no. 1 (January 1, 2019): 8707–16. http://dx.doi.org/10.15446/rfnam.v72n1.72564.

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The consequences of climate change in the agricultural sector worldwide expose the need to understand the scope of their impact in order to develop mitigation and adaptation strategies for them. Therefore, this research evaluated the alterations in the environmental conditions and their relation with the vulnerability of smallholder cocoa (Theobroma cacao L.) producers to climate change in the province of Manabí. A non-probabilistic sampling of 1,060 small farmers was made in five cantons of Manabí. The vulnerability was determined through indicators such as the normalized difference vegetatio

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Livingstone, Stephen J., Emma L. M. Lewington, Chris D. Clark, Robert D. Storrar, Andrew J. Sole, Isabelle McMartin, Nico Dewald, and Felix Ng. "A quasi-annual record of time-transgressive esker formation: implications for ice-sheet reconstruction and subglacial hydrology." Cryosphere 14, no. 6 (June 18, 2020): 1989–2004. http://dx.doi.org/10.5194/tc-14-1989-2020.

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Abstract. We identify and map chains of esker beads (series of aligned mounds) up to 15 m high and on average ∼ 65 m wide in central Nunavut, Canada, from the high-resolution (2 m) ArcticDEM. Based on the close 1 : 1 association with regularly spaced, sharp-crested ridges interpreted as De Geer moraines, we interpret the esker beads to be quasi-annual ice-marginal deposits formed time-transgressively at the mouth of subglacial conduits during deglaciation. Esker beads therefore preserve a high-resolution record of ice-margin retreat and subglacial hydrology. The well-organised beaded esker net

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Abdulai, Patricia Jitta, and Eun-Sung Chung. "Uncertainty Assessment in Drought Severities for the Cheongmicheon Watershed Using Multiple GCMs and the Reliability Ensemble Averaging Method." Sustainability 11, no. 16 (August 8, 2019): 4283. http://dx.doi.org/10.3390/su11164283.

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The consequence of climate variations on hydrology remains the greatest challenging aspect of managing water resources. This research focused on the quantitative approach of the uncertainty in variations of climate influence on drought pattern of the Cheongmicheon watershed by assigning weights to General Circulation Models (GCMs) based on model performances. Three drought indices, Standardized Precipitation Evapotranspiration Index (SPEI), Standardized Precipitation Index (SPI) and Streamflow Drought Index (SDI) are used for three durations 3-, 6- and 9-months. This study included 27 GCMs fro

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Simmonds, Jose, Juan A. Gómez, and Agapito Ledezma. "The role of agent-based modeling and multi-agent systems in flood-based hydrological problems: a brief review." Journal of Water and Climate Change 11, no. 4 (October 25, 2019): 1580–602. http://dx.doi.org/10.2166/wcc.2019.108.

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Abstract Flood problems are complex phenomena with a direct relationship with the hydrological cycle; these are natural processes occurring in water systems, that interact at different spatial and temporal scales. In modeling the hydrological phenomena, traditional approaches, like physics-based mathematical equations and data-driven modeling (DDM) are used. Advances in hydroinformatics are helping to understand these physical processes, with improvements in the collection and analysis of hydrological data, information and communication technologies (ICT), and geographic information systems (G

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Chan, T. P., and Rao S. Govindaraju. "Pore-morphology-based simulations of drainage and wetting processes in porous media." Hydrology Research 42, no. 2-3 (April 1, 2011): 128–49. http://dx.doi.org/10.2166/nh.2011.058.

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Soil hydraulic properties relating saturation, water pressure, and hydraulic conductivity are known to exhibit hysteresis. In this paper, we focus on the determination of the water retention curve for a porous medium through a novel pore-scale simulation technique that is based on mathematical morphology. We develop an algorithm that allows for the representation of three-dimensional randomly packed porous media of any geometry (i.e. not restricted to idealized geometries such as spherical or ellipsoidal particles/pore space) so that the connectivity-, tortuosity-, and hysteresis-causing mecha

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Lundström, T., Hans Åkerstedt, I. Larsson, Jiri Marsalek, and Maria Viklander. "Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake." Water 12, no. 8 (July 22, 2020): 2080. http://dx.doi.org/10.3390/w12082080.

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An innovative concept of dynamic stormwater storage in sponge-like porous bodies (SPBs) is presented and modelled using first principles, for down-flow and up-flow variants of SPBs. The rate of inflow driven by absorption and/or capillary action into various porous material structures was computed as a function of time and found to be critically dependent on the type of structure and the porous material used. In a case study, the rates of inflow and storage filling were modelled for various conditions and found to match, or exceed, the rates of rainwater inflow and volume accumulation associat

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Balogun, Oluwafemi Samson, Muhammad Zeshan Arshad, Muhammad Zafar Iqbal, and Madiha Ghamkhar. "A new modified Lehmann type – II G class of distributions: exponential distribution with theory, simulation, and applications to engineering sector." F1000Research 10 (June 17, 2021): 483. http://dx.doi.org/10.12688/f1000research.52494.1.

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Background: Modeling against non-normal data a challenge for theoretical and applied scientists to choose a lifetime model and expect to perform optimally against experimental, reliability engineering, hydrology, ecology, and agriculture sciences, phenomena. Method: We have introduced a new G class that generates relatively more flexible models to its baseline and we refer to it as the new modified Lehmann Type – II (ML–II) G class of distributions. A list of new members of ML–II-G class is developed and as a sub-model the exponential distribution, known as the ML-II-Exp distribution is consid

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36

Lee, Kun-Fa, and Jia-Qi Lai. "Research on Modeling Technology and Application of Simulation Planning Based on Urban Ecological Park." International Journal of Engineering and Technology 12, no. 3 (August 2020): 37–40. http://dx.doi.org/10.7763/ijet.2020.v12.1181.

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Based on the importance of the construction of the regional environmental space of the urban ecological park, research on the topography, geology, hydrology, human activities and other aspects of the ecological engineering area of the park, use Geographic Information System (GIS) and MIKE21 technology to construct the regional environmental space of the urban ecological park, and establish the urban park Eco-engineering river section plane two-dimensional water flow, mathematical model analysis provides predictive engineering, simulating the change characteristics of river flow field and water

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Tang, Jinyun, William J. Riley, and Qing Zhu. "Supporting hierarchical soil biogeochemical modeling: version 2 of the Biogeochemical Transport and Reaction model (BeTR-v2)." Geoscientific Model Development 15, no. 4 (February 24, 2022): 1619–32. http://dx.doi.org/10.5194/gmd-15-1619-2022.

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Abstract. Reliable soil biogeochemical modeling is a prerequisite for credible projections of climate change and associated ecosystem feedbacks. This recognition has called for frameworks that can support flexible and efficient development and application of new or alternative soil biogeochemical modules in Earth system models (ESMs). The the Biogeochemical Transport and Reaction model version 1 (BeTR-v1) code (i.e., CLM4-BeTR) is one such framework designed to accelerate the development and integration of new soil biogeochemistry formulations into ESMs and to analyze structural uncertainty in

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38

Stefanyshyn, Dmytro V., Yaroslaw V. Khodnevich та Vasyl M. Korbutiak. "Еstimating the Chézy roughness coefficient as a characteristic of hydraulic resistance to flow in river channels: a general overview, existing challenges, and ways of their overcoming". Environmental safety and natural resources 39, № 3 (23 вересня 2021): 16–43. http://dx.doi.org/10.32347/2411-4049.2021.3.16-43.

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This paper deals with results of a systemized overview of the Chézy roughness coefficient calculation problem as one most frequently used empirical characteristics of hydraulic resistance. The overview is given in the context of the formation of reliable empirical data needed to support hydro-engineering calculations and mathematical modelling of open flows in river channels. The problem topicality is because of a large number of practical tasks which need such a pre-research. In many cases, the accuracy of determining empirical hydraulic resistance characteristics can largely affect the accur

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39

Goldsmith, W., D. Bernardi, and L. Schippa. "River, delta and coastal morphological response accounting for biological dynamics." Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 413–20. http://dx.doi.org/10.5194/piahs-367-413-2015.

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Abstract. Management and construction can increase resilience in the face of climate change, and benefits can be enhanced through integration of biogenic materials including shells and vegetation. Rivers and coastal landforms are dynamic systems that respond to intentional and unintended manipulation of critical factors, often with unforeseen and/or undesirable resulting effects. River management strategies have impacts that include deltas and coastal areas which are increasingly vulnerable to climate change with reference to sea level rise and storm intensity. Whereas conventional assessment

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40

Cabezas Pinzón, Laura Viviana, Rigaud Sanabria-Marin, Federico Andrade-Rivas, Aquiles Darghan, and Víctor-Alberto Olano. "Relation between Environmental Variables and the Spatial Distribution of the Aedes aegypti Mosquito in Rural Colombia." Revista Salud Bosque 12, no. 1 (April 25, 2022): 1–18. http://dx.doi.org/10.18270/rsb.v12i1.3218.

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Background: Changes in global and local environmental variables condition the distribution and density of disease vectors. This study aimed to estimate the relationship between the entomological indicator of immature and adult forms of the Aedes aegypti mosquito per unit area, the environmental variables of temperature, precipitation, and relative humidity in rural areas of two municipalities in Colombia. Methods: Four spatial regression models were fitted: The Spatial Autoregressive Model with Autoregressive Disturbances of order [1,1] (SARAR[1,1]), Spatial Error Model (SEM), Spatial La

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Rathi, Vinay Kumar, Shobha Ram, Rohitashw Kumar, Avinash Agarwal, and R. K. Nema. "Hydrological classification and performance of Himalayan springs in climate change scenario – a case study." Water Supply 20, no. 2 (December 27, 2019): 594–608. http://dx.doi.org/10.2166/ws.2019.191.

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Abstract The present study was conducted to evaluate 33 springs' hydrology (discharge and yield estimation) of Chandrabhaga and Danda watersheds of Uttarakhand, India. The springs were classified using Meinzer method and evaluated the relative performance for rejuvenation strategy. It was found that most of springs fall in sixth and seventh class order with flow rate 6.5 to 65.5 and 0.8 to 6.5 m3·day−1, respectively. The relative performance of springs were analyzed based on four methods: (i) spring flow variability, (ii) normalized spring flow (short and long duration), (iii) rainfall spring

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42

Dong, Leihua, Lihua Xiong, and Kun-xia Yu. "Uncertainty Analysis of Multiple Hydrologic Models Using the Bayesian Model Averaging Method." Journal of Applied Mathematics 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/346045.

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Since Bayesian Model Averaging (BMA) method can combine the forecasts of different models together to generate a new one which is expected to be better than any individual model’s forecast, it has been widely used in hydrology for ensemble hydrologic prediction. Previous studies of the BMA mostly focused on the comparison of the BMA mean prediction with each individual model’s prediction. As BMA has the ability to provide a statistical distribution of the quantity to be forecasted, the research focus in this study is shifted onto the comparison of the prediction uncertainty interval generated

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Cárdenas Gutiérrez, Javier Alfonso, Jose Leonardo Jacome Carrascal, and Mawency Vergel Ortega. "Determination of potential and actual evapotranspiration in watershed, using mathematical models." Revista Boletín Redipe 10, no. 3 (March 1, 2021): 225–31. http://dx.doi.org/10.36260/rbr.v10i3.1230.

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In this research, it is analyzed the calculation of real evapotranspiration in hydrographic basins, it is taken as a reference the Aguablanca Creek, located in the municipality of Bochalema, North of Santander-Colombia, where it is evaluated the hydrologic balance of this basin from the determination of detailed calculations of four mathematical models, to later evaluate the hydrologic balance of this basin, with the purpose of being able to make a better administration of these resources, as well as the use of the soil, betting on the development of an ecologically sustainable society with lo

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Shu, Lele, Paul A. Ullrich, and Christopher J. Duffy. "Simulator for Hydrologic Unstructured Domains (SHUD v1.0): numerical modeling of watershed hydrology with the finite volume method." Geoscientific Model Development 13, no. 6 (June 18, 2020): 2743–62. http://dx.doi.org/10.5194/gmd-13-2743-2020.

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Abstract. Hydrologic modeling is an essential strategy for understanding and predicting natural flows, particularly where observations are lacking in either space or time or where complex terrain leads to a disconnect in the characteristic time and space scales of overland and groundwater flow. However, significant difficulties remain for the development of efficient and extensible modeling systems that operate robustly across complex regions. This paper introduces the Simulator for Hydrologic Unstructured Domains (SHUD), an integrated, multiprocess, multiscale, flexible-time-step model, in wh

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45

VERGARA, FERNÁN, VIVIANE CHIESA, CECILIA COSTA, ROBERTA OLIVEIRA, RICARDO DIAS, and GIRLENE MACIEL. "Aplicabilidade do modelo matemático SAD-IPH na análise de processos de outorga: o caso da Bacia do Ribeirão Taquaruçu." GOT - Journal of Geography and Spatial Planning, no. 21 (June 30, 2021): 208–34. http://dx.doi.org/10.17127/got/2021.21.009.

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In order to issue a water permit, which allows abstraction of water in a given place, the issuer needs to make sure, based on the hydrology of the region, that the amount of water available in the water body is sufficient to meet not only the demand associated with the required entitlement, but also all the existing demands from other users in the basin. This paper aims at evaluating the usefulness of the SAD-IPH mathematical model to simulate water demand scenarios in the Ribeirão Taquaruçu basin, located in the city of Palmas, state of Tocantins. Simulations provided by the SAD-IPH model ind

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46

D. K. Borah and M. Bera. "WATERSHED-SCALE HYDROLOGIC AND NONPOINT-SOURCE POLLUTION MODELS: REVIEW OF MATHEMATICAL BASES." Transactions of the ASAE 46, no. 6 (2003): 1553–66. http://dx.doi.org/10.13031/2013.15644.

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47

Pawitan, Hidayat, and Muh Taufik. "Non-linear Routing Scheme at Grid Cell Level for Large Scale Hydrologic Models: A Review." Agromet 35, no. 2 (August 12, 2021): 60–72. http://dx.doi.org/10.29244/j.agromet.35.2.60-72.

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Abstract (sommario):

New tools and concepts in the form of mathematical models, remote sensing and Geographic Information System (GIS), communication and telemetering have been developed for the complex hydrologic systems that permit a different analysis of processes and allow watershed to be considered as an integrated planning and management unit. Hydrological characteristics can be generated through spatial analysis, and ready for input into a distributed hydrologic models to define adequately the hydrological response of a watershed that can be related back to the specific environmental, climatic, and geomorph

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48

Sharma, Ashish, Suresh Hettiarachchi, and Conrad Wasko. "Estimating design hydrologic extremes in a warming climate: alternatives, uncertainties and the way forward." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2195 (March 2021): 20190623. http://dx.doi.org/10.1098/rsta.2019.0623.

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It is now well established that our warming planet is experiencing changes in extreme storms and floods, resulting in a need to better specify hydrologic design guidelines that can be projected into the future. This paper attempts to summarize the nature of changes occurring and the impact they are having on the design flood magnitude, with a focus on the urban catchments that we will increasingly reside in as time goes on. Two lines of reasoning are used to assess and model changes in design hydrology. The first of these involves using observed storms and soil moisture conditions and projecti

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Shindell, Drew. "Estimating the potential for twenty-first century sudden climate change." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1860 (July 30, 2007): 2675–94. http://dx.doi.org/10.1098/rsta.2007.2088.

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I investigate the potential for sudden climate change during the current century. This investigation takes into account evidence from the Earth's history, from climate models and our understanding of the physical processes governing climate shifts. Sudden alterations to climate forcing seem to be improbable, with sudden changes instead most likely to arise from climate feedbacks. Based on projections from models validated against historical events, dramatic changes in ocean circulation appear unlikely. Ecosystem–climate feedbacks clearly have the potential to induce sudden change, but are rela

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50

Reichert, P., G. White, M. J. Bayarri, and E. B. Pitman. "Mechanism-based emulation of dynamic simulation models: Concept and application in hydrology." Computational Statistics & Data Analysis 55, no. 4 (April 2011): 1638–55. http://dx.doi.org/10.1016/j.csda.2010.10.011.

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