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Journal articles on the topic 'Rating curve method'

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Published: 2 June 2025

Last updated: 31 July 2025

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1

Kim, Yeonsu, Sungryul Oh, Seungsoo Lee, Jisun Byun, and Hyunuk An. "Application of Stage-Fall-Discharge Rating Curves to a Reservoir Based on Acoustic Doppler Velocity Meter Measurement Data." Water 13, no. 17 (2021): 2443. http://dx.doi.org/10.3390/w13172443.

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The applicability of the stage-fall-discharge (SFD) method in combination with acoustic Doppler velocity meter (ADVM) data, upstream of a hydraulic structure, specifically, the Sejong-weir located in the Geum River, Korea, was examined. We developed three rating curves: a conventional simple rating curve with the data measured using an acoustic Doppler current profiler (ADCP) and floating objects, an SFD rating curve with the data measured using the ADCP and floating objects, and an SFD rating curve with the data measured using an ADVM. Because of the gate operation effect, every rating curve

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2

Dias, Luanna Costa, Lindemberg Lima Fernandes, and David Franco Lopes. "Elaboração e Extrapolação de Curvas-chave na Região Amazônica." Revista Brasileira de Geografia Física 12, no. 6 (2020): 2285. http://dx.doi.org/10.26848/rbgf.v12.6.p2285-2301.

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O estudo consiste na elaboração e extrapolação de curvas-chave localizadas na Região Amazônica. A elevada disponibilidade hídrica da Região requer hidrogramas precisos para gestão dos Recursos Hídricos. Foram escolhidas cinco estações, com período de dados de 1971 a 2015 e o uso de 463 medições de descarga, para elaboração de curvas-chave do tipo potência e relacionando “cota x vazão” empregando duas formas de calibração: utilização do programa GrafChav e da ferramenta Solver do Excel, tendo o coeficiente de Nash-Sutcliffe (NS) como validação. A extrapolação foi realizada pelos métodos: Logarí

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Sutyrina, E. N., and T. I. Antonova. "SRTM Data Application for Extrapolation of Rating Curves (On the Example of the Iya River at the Tulun Gauge)." Bulletin of Irkutsk State University. Series Earth Sciences 41 (2022): 140–50. http://dx.doi.org/10.26516/2073-3402.2022.41.140.

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The manuscript discusses the method developed by the authors for restoring the cross-sectional area curve and extrapolate rating curves for the Iya River at the Tulun gauge, using the Shuttle Radar Topography Mission (SRTM) data. As part of the work, the systematic correction for the study area was determined to recalculate altitudes from a digital terranean model according to SRTM topographic data to the Baltic Height System. The river width data from SRTM-based information after systematic correction are in good agreement with the width from large-scale satellite images as well as with the f

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Inukai, Yukio, Hideto Taya, Neiichi Nagamura, and Hiroshi Kuriyama. "An Evaluation Method of Combined Effects of Infrasound and Audible Noise." Journal of Low Frequency Noise, Vibration and Active Control 6, no. 3 (1987): 119–25. http://dx.doi.org/10.1177/026309238700600304.

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A psychophysical experiment was conducted to investigate an evaluation method for the combined effects of infrasound and audible noise. In the experiment, subjective rating of 80 mixed noise stimuli were obtained from 15 subjects on 22 semantic-differential-type scales. The stimulus noise conditions were mixtures of one of eight pure tones at 5, 10, 20, and 40 Hz and one of eight 1/3 octave band noises with centre frequencies 63, 125, 250, and 500 Hz. The rating data were subjected to a principal component analysis and yielded two principal components, these were interpreted as the perceptual

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Hulsman, Petra, Thom A. Bogaard, and Hubert H. G. Savenije. "Rainfall-runoff modelling using river-stage time series in the absence of reliable discharge information: a case study in the semi-arid Mara River basin." Hydrology and Earth System Sciences 22, no. 10 (2018): 5081–95. http://dx.doi.org/10.5194/hess-22-5081-2018.

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Abstract. Hydrological models play an important role in water resources management. These models generally rely on discharge data for calibration. Discharge time series are normally derived from observed water levels by using a rating curve. However, this method suffers from many uncertainties due to insufficient observations, inadequate rating curve fitting procedures, rating curve extrapolation, and temporal changes in the river geometry. Unfortunately, this problem is prominent in many African river basins. In this study, an alternative calibration method is presented using water-level time

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Othman, Faridah, Mohammad Sadegh Sadeghian, Faegheh Ebrahimi, and Mohammad Heydari. "A Study on Sedimentation in Sefidroud Dam by using Depth Evaluation and Comparing the Results with USBR and FAO methods." International Proceedings of Chemical, Biological and Environmental Engineering 51 (June 3, 2015): 6. https://doi.org/10.5281/zenodo.18261.

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One of the fundamental issues with the operation of surface water resources is erosion, and sediment transport. Reducing the reservoir’s useful life and declining the reservoir storage are subsequences of erosion and sediment transport. These natural events occur in different geographical circumstances. Since the major part of the watershed sedimentation consists of suspended sediments, the amount of suspended loads, has a special priority. (Kişi 2007) Determining the amount of erosion or sediment transportation is practically very difficult. So far different methods have been proposed a

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MOTONAGA, Yoshiki, Chaochao QIAN, Tadashi YAMADA, and Masashige YAMASAKA. "THE NEW TYPE DISCHRGE RATING METHOD USING WATER LEVEL-CONVEYANCE CURVE, HK CURVE." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 68, no. 4 (2012): I_1357—I_1362. http://dx.doi.org/10.2208/jscejhe.68.i_1357.

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8

Shah, Shoukat Ali, Madeeha Kiran, and Komal Qasim. "GENERATING RATING CURVE AND RATING TABLE OF GOLARCHI MINOR." Big Data in Water Resources Engineering (BDWRE) 3, no. 1 (2022): 10–14. http://dx.doi.org/10.26480/bdwre.01.2022.10.14.

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Hydrologists must have huge theoretical and practical knowledge of irrigation networks such as rivers, canals, streams, channels, and minors. Because whole irrigation system relies on a gauge and discharges relationship which is essential for controlling floods, water resource management, and hydrologic modeling. The true and consistent figures of flow rate in the irrigation system are important for irrigation water efficiency. Mostly, Hydrologic modeling activities like hydraulic structures, designs, and management of surplus water in canals are subjected to the flow of irrigation water which

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Tanjung, M. S., and D. L. S. Nasution. "Determining discharge rating curve at Karai sub watershed." IOP Conference Series: Earth and Environmental Science 1241, no. 1 (2023): 012066. http://dx.doi.org/10.1088/1755-1315/1241/1/012066.

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Abstract The availability of discharge rating curve equation in a watershed is very important to predict river discharge in a watershed, while discharge shown the water availability in a watershed. This research aims to determine discharge rating curve equation at Karai Sub Watershed in rainy season. This research was conducted by recording water level using water level logger and measuring river discharge using current meter and then analyze the relation of the water level and river discharge data to make the equation of discharge rating curve. The equation of discharge rating curve determine

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Oh, Seung Hyun. "The Relation between Two Kinds of Par Yield Curves: Benchmark Par Yield Curve and Company Par Yield Curve." Journal of Derivatives and Quantitative Studies 20, no. 3 (2012): 325–46. http://dx.doi.org/10.1108/jdqs-03-2012-b0003.

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This study investigates the relation between two kinds of par yield curves estimated in Korean bond market: benchmark par yield curve and company par yield curve. The former is published as a benchmark for corporate bonds with a given credit rating and the latter is utilized for valuing a specific corporate bond. Spot rate curves are extracted from the par yield curves by applying bootstrapping method. The spreads between the two spot rate curves are analyzed for 7 years (2005~2012) of corporate bond transaction data. Six results are obtained from various sub-samples classified by credit ratin

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Pedersen, Øyvind, Jochen Aberle, and Nils Rüther. "Hydraulic scale modelling of the rating curve for a gauging station with challenging geometry." Hydrology Research 50, no. 3 (2019): 825–36. http://dx.doi.org/10.2166/nh.2019.044.

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Abstract Direct discharge measurements during flood events can be challenging from a technical as well as from a safety point of view. Therefore, flood discharges are often estimated by extrapolating a rating curve. Extrapolations far outside the range of the directly measured discharges are common, although the associated errors can be large. In this article, a novel method to determine suitable stage measurement locations and derive rating curves using a hydraulic scale model is presented. A hydraulic scale model for a natural gauging station site is produced with a computer numerical contro

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12

Gu, Ruochuan. "A RATING-CURVE METHOD FOR HYDRODYNAMIC SIMULATIONS IN CONTAMINANT TRANSPORT MODELING." Journal of the American Water Resources Association 34, no. 2 (1998): 397–407. http://dx.doi.org/10.1111/j.1752-1688.1998.tb04144.x.

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Zakariah, Ridzwan Bin, Norzila Binti Othman, Mohd Azlan bin Mohd Yusoff, and Wahid Ali Hamood Altowayti. "Determination of Stage Discharge Rating Curve at Sungai Batang Melaka." Journal of Southwest Jiaotong University 56, no. 3 (2021): 248–61. http://dx.doi.org/10.35741/issn.0258-2724.56.3.21.

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The river is a natural source of water with distinctive hydraulic features. The hydraulic characteristic is a factor in morphology changes. The article describes a determination of a stage discharge rating curve at Sungai Batang Melaka that has been developed for the first time. The stage discharge rating curve is used to determine whether the rivers of this area are the cause of floods that have occurred in Malacca. Based on data collection for width and depth at four locations, enabling to evaluate and analysis the data of each cross-section for Sungai Batang Melaka. By observing the river v

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Bhandari, Biplov, Kel Markert, Vikalp Mishra, Amanda Markert, and Robert Griffin. "Investigation of Data-Driven Rating Curve (DDRC) Approach." Water 15, no. 3 (2023): 604. http://dx.doi.org/10.3390/w15030604.

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Flooding is a recurring natural disaster worldwide; developing countries are particularly affected due to poor mitigation and management strategies. Often discharge is used to inform the flood forecast. The discharge is usually inferred from the water level via the rating curve because the latter is relatively easy to measure compared to the former. This research focuses on Cambodia, where data scarcity is prevalent, as in many developing countries. Thus, the rating curve has not been updated, making it difficult to effectively evaluate the performance of the global streamflow services, such a

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15

Kim, Lee, Chang, et al. "Daily River Discharge Estimation Using Multi-Mission Radar Altimetry Data and Ensemble Learning Regression in the Lower Mekong River Basin." Remote Sensing 11, no. 22 (2019): 2684. http://dx.doi.org/10.3390/rs11222684.

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Estimating river discharge (Q) is critical for ecosystems and water resource management. Traditionally, estimating Q has depended on a single rating curve or the Manning equation. In contrast to the single rating curve, several rating curves at different locations have been linearly combined in an ensemble learning regression method to estimate Q (ELQ) at the Brazzaville gauge station in the central Congo River in a previous study. In this study, we further tested the proposed ELQ and apply it to the Lower Mekong River Basin (LMRB) with three locations: Stung Treng, Kratie, and Tan Chau. Two m

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16

Alvisi, S., and M. Franchini. "A grey-based method for evaluating the effects of rating curve uncertainty on frequency analysis of annual maxima." Journal of Hydroinformatics 15, no. 1 (2012): 194–210. http://dx.doi.org/10.2166/hydro.2012.127.

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A grey-based technique for characterizing the rating curve uncertainty due to discharge measurement errors and its effect on flood frequency analysis is here presented. On the basis of river stage and discharge measurements, the grey parameters of the rating curve are estimated by using a grey non-linear regression. Commencing with this grey rating curve and a set of annual maximum stages, we show how the probability distribution (here assumed of EV1 type) of the grey annual maximum discharges can be estimated. The grey EV1 distribution can be estimated through two approaches, the first of whi

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17

Sikorska, A. E., A. Scheidegger, K. Banasik, and J. Rieckermann. "Considering rating curve uncertainty in water level predictions." Hydrology and Earth System Sciences 17, no. 11 (2013): 4415–27. http://dx.doi.org/10.5194/hess-17-4415-2013.

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Abstract. Streamflow cannot be measured directly and is typically derived with a rating curve model. Unfortunately, this causes uncertainties in the streamflow data and also influences the calibration of rainfall-runoff models if they are conditioned on such data. However, it is currently unknown to what extent these uncertainties propagate to rainfall-runoff predictions. This study therefore presents a quantitative approach to rigorously consider the impact of the rating curve on the prediction uncertainty of water levels. The uncertainty analysis is performed within a formal Bayesian framewo

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18

Sikorska, A. E., A. Scheidegger, K. Banasik, and J. Rieckermann. "Considering rating curve uncertainty in water level predictions." Hydrology and Earth System Sciences Discussions 10, no. 3 (2013): 2955–86. http://dx.doi.org/10.5194/hessd-10-2955-2013.

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Abstract. Streamflow cannot be measured directly and is typically derived with a rating curve model. Unfortunately, this causes uncertainties in the streamflow data and also influences the calibration of rainfall-runoff models if they are conditioned on such data. However, it is currently unknown to what extent these uncertainties propagate to rainfall-runoff predictions. This study therefore presents a quantitative approach to rigorously consider the impact of the rating curve on the prediction uncertainty of water levels. The uncertainty analysis is performed within a formal Bayesian framewo

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19

Sitorus, Atikah, and Edi Susanto. "A Sediment Rating-curve Method to Determine Sediment Discharge for Rainy Season in Micro-scale Watersheds." Indonesian Journal of Agricultural Research 2, no. 1 (2019): 21–27. http://dx.doi.org/10.32734/injar.v2i1.857.

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This research was carried out to overcome the problem of the lack of sediment data available in several watersheds in North Sumatra, the lack of available sediment data is caused by the requirement of a large amount of time, cost and risk to obtain such data. Purpose of this study was to obtain the equation of sediment rating curve. The sediment rating curve is an equation that connects the river discharge with sediment discharge, so that to obtain the sediment discharge, it is enough to use the river discharge data. This research used the descriptive method using the primary (sediment dischar

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20

Rozos, Evangelos, Jorge Leandro, and Demetris Koutsoyiannis. "Development of Rating Curves: Machine Learning vs. Statistical Methods." Hydrology 9, no. 10 (2022): 166. http://dx.doi.org/10.3390/hydrology9100166.

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Streamflow measurements provide valuable hydrological information but, at the same time, are difficult to obtain. For this reason, discharge records of regular intervals are usually obtained indirectly by a stage–discharge rating curve, which establishes a relation between measured water levels to volumetric rate of flow. Rating curves are difficult to develop because they require simultaneous measurements of discharge and stage over a wide range of stages. Furthermore, the shear forces generated during flood events often change the streambed shape and roughness. As a result, over long periods

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21

Shivers, Dorianne E., and Glenn E. Moglen. "Spurious Correlation in the USEPA Rating Curve Method for Estimating Pollutant Loads." Journal of Environmental Engineering 134, no. 8 (2008): 610–18. http://dx.doi.org/10.1061/(asce)0733-9372(2008)134:8(610).

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Othman, Nariman Yahya, Zahra Abd Saleh, and Zainab Ali Omran. "Development of Stage – Distance – Discharge Relationship and Rating Curve using Least Square Method." Civil Engineering Journal 5, no. 9 (2019): 1959–69. http://dx.doi.org/10.28991/cej-2019-03091385.

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For any river, besides the importance of stage – discharge relationship (rating curve), a stage-discharge- distance relationship is of more significance. The accurate estimation of both relationships along a river reach is considered a key point for various applications of water resources engineering such as operation and management of water resources projects, designing of hydraulic structures, and sediment analysis. In this paper, both relationships were established for the Shatt Al – Hillah river reach by applying multiple linear regression and simple linear regression using least square me

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Aslami, M. H., A. J. Pierre, R. Franchitika, and A. B. Baria. "Improved rating curve development for ogee spillways using DualSPHysics: a comparative SPH approach." IOP Conference Series: Earth and Environmental Science 1488, no. 1 (2025): 012048. https://doi.org/10.1088/1755-1315/1488/1/012048.

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Abstract This study investigates the development of a rating curve for an ogee spillway using Smoothed Particle Hydrodynamics (SPH) simulations, specifically through the open-source DualSPHysics software. The numerical model was validated against experimental data and showed good agreement with water surface elevation predictions. A continuous, linearly increasing flow rate was simulated to generate a comprehensive dataset of discharge and water level values. Two methods for constructing the rating curve were compared: the traditional approach using Q = CLH 3/2 and a modified version using Q =

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O.O., Olukayode, Bayewu O.O., Adebisi N.O., Mosuro G.O., Ariyo S.O., and Orimogunje O.B. "Multi-Criteria Analysis Method for Aquifer Vulnerability Investigation Using Godt Method at Idi-Ayunre, Ibadan, Southwestern Nigeria." African Journal of Environment and Natural Science Research 6, no. 2 (2023): 97–112. http://dx.doi.org/10.52589/ajensr-7df7dj7o.

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Geophysical investigation involving Vertical Electrical Sounding (VES) Schlumberger array was carried out across Idi-Ayunre, Ibadan, a typical basement complex area having a rock composition of migmatite-gneiss, quartzite, and biotite-hornblende. A total of forty (40) vertical electrical sounding data were acquired with maximum current electrode separation of 100m using resistivity meter and its accessories. The aim of the study was to evaluate the aquifer vulnerability of the study area to contamination. The VES results were both qualitatively and quantitatively interpreted using partial curv

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Ros, F. C., H. Tosaka, L. M. Sidek, M. N. Desa, and K. Arifin. "Stage discharge curve for Guillemard Bridge streamflow sation based on rating curve method using historical flood event data." IOP Conference Series: Earth and Environmental Science 16 (June 17, 2013): 012130. http://dx.doi.org/10.1088/1755-1315/16/1/012130.

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Poletto, Kayla, Silvio C. Sampaio, Manoel M. F. de Queiroz, Benedito M. Gomes, and Rosimaldo Soncela. "Turbidimetry as an alternative method to determine the rating curve of suspended sediments." Engenharia Agrícola 31, no. 3 (2011): 598–606. http://dx.doi.org/10.1590/s0100-69162011000300019.

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Understanding hydrosedimental behavior of a watershed is essential for properly managing and using its hydric resources. The objective of this study was to verify the feasibility of the alternative procedure for the indirect determination of the sediment key curve using a turbidimeter. The research was carried out on the São Francisco Falso River, which is situated in the west of the state of Paraná on the left bank of ITAIPU reservoir. The direct method was applied using a DH-48 sediment suspended sampler. The indirect method consisted of the use of a linigraph and a turbidimeter. Based on th

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Lee, Woo Seok, Kil Seong Lee, Sang Ug Kim, and Eun-Sung Chung. "The Development of Rating Curve Considering Variance Function Using Pseudo-likelihood Estimation Method." Water Resources Management 24, no. 2 (2009): 321–48. http://dx.doi.org/10.1007/s11269-009-9448-8.

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Di Baldassarre, G., and A. Montanari. "Uncertainty in river discharge observations: a quantitative analysis." Hydrology and Earth System Sciences 13, no. 6 (2009): 913–21. http://dx.doi.org/10.5194/hess-13-913-2009.

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Abstract. This study proposes a framework for analysing and quantifying the uncertainty of river flow data. Such uncertainty is often considered to be negligible with respect to other approximations affecting hydrological studies. Actually, given that river discharge data are usually obtained by means of the so-called rating curve method, a number of different sources of error affect the derived observations. These include: errors in measurements of river stage and discharge utilised to parameterise the rating curve, interpolation and extrapolation error of the rating curve, presence of unstea

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Susanto, E., N. Hatta, and Sumono. "A rating-curve method for determining debit for dry season in micro-scale watersheds." IOP Conference Series: Earth and Environmental Science 260 (June 7, 2019): 012029. http://dx.doi.org/10.1088/1755-1315/260/1/012029.

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Sahoo, Bhabagrahi, Muthiah Perumal, Tommaso Moramarco, and Silvia Barbetta. "Rating Curve Development at Ungauged River Sites using Variable Parameter Muskingum Discharge Routing Method." Water Resources Management 28, no. 11 (2014): 3783–800. http://dx.doi.org/10.1007/s11269-014-0709-9.

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Navas, Rafael, Pablo Gamazo, and R. Willem Vervoort. "Bayesian inference of synthetic daily rating curves by coupling Chebyshev Polynomials and the GR4J model." Proceedings of IAHS 385 (April 19, 2024): 399–406. http://dx.doi.org/10.5194/piahs-385-399-2024.

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Abstract. In fluvial dynamics studies, there are instances where it becomes necessary to estimate the daily discharge of a river in locations where only one instantaneous level record is available per day. In such cases, there may be no rating curve, or one that is unreliable, making it difficult to make accurate discharge estimates. A daily rating curve would be an estimate of the daily discharge of a river, from a single instantaneous stage level. This work proposes to estimate synthetic (non-gauged) daily rating curves from nearby gauged locations using a rainfall-runoff model. A rainfall-r

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DeGagné, Mark P. J., and Slobodan P. Simonovic. "A new method for mathematical modelling of complex stage–discharge relations." Canadian Journal of Civil Engineering 21, no. 6 (1994): 990–98. http://dx.doi.org/10.1139/l94-104.

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This paper describes a computer-based approach named multiobjective stage–discharge evaluator (MOSDE), which employs the method of regression analysis for the development of stage–discharge rating curves. The regression is done recursively as the program steps through the data set, by adding one point at each iteration. Multiobjective analysis is used to evaluate the improvement or deterioration of the model using a set of statistical criteria. The overall task is to fit a proper curve, or curves, to any given stage–discharge data set. Also, the key transition points in the stage–discharge rel

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Li, Zhanjiang, Na Hou, Jinmei Su, and Yuchun Liu. "Model of credit rating of micro enterprise based on fuzzy integration." Filomat 32, no. 5 (2018): 1831–42. http://dx.doi.org/10.2298/fil1805831l.

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This paper selects credit data of 1688 micro enterprises in a certain commercial bank in China from 2013 to 2016 as empirical research objects. We use the combination method of t test and correlation analysis to construct credit rating indicator system, then use entropy weight method and fuzzy integration to construct credit evaluation model, and lastly divide credit rating of micro enterprises. The empirical results indicate three main points. Firstly, final constructed indicator system can significantly discriminate credit state and avoid information overlapping, and curve ROC proves credit

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Kim, Yeonsu, Jeongyup Kim, Hyunuk An, and Kwansue Jung. "Improvement of the Method using the Coefficient of Variation for Automatic Multi-segmentation Method of a Rating Curve." Journal of the Korean Water Resources Association 48, no. 10 (2015): 807–16. http://dx.doi.org/10.3741/jkwra.2015.48.10.807.

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Petersen-Øverleir, Asgeir. "A robust stage-discharge rating curve model based on critical flow from a reservoir." Hydrology Research 37, no. 3 (2006): 217–33. http://dx.doi.org/10.2166/nh.2006.009.

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Hydrometric gauging stations are often sited in reservoirs such as lakes and river pools since they possess favourable features for streamflow determination. By applying the equations which govern critical flow from a reservoir along with a spline representation of the known geometric characteristics of the reservoir outlet, a new method is developed for estimating the stage-discharge relationship in reservoir-like situations. The proposed rating curve model is amenable to least squares estimation using the available stage-discharge measurements. The proposed model is shown by theory to be gen

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Paoletti, Michele, Marco Pellegrini, Alberto Belli, et al. "Discharge Monitoring in Open-Channels: An Operational Rating Curve Management Tool." Sensors 23, no. 4 (2023): 2035. http://dx.doi.org/10.3390/s23042035.

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An aspect correlated with climate change is certainly represented by the alternation of severe floods and relevant drought periods. Moreover, there is evidence that changes in climate and land cover are inducing changes in stream channel cross-sections, altering local channel capacity. A direct consequence of a significant change in the local channel capacity is that the relationship between the amount of water flowing at a given point in a river or stream (usually at gauging stations) and the corresponding stage in that section, known as a stage–discharge relationship or rating curve, is chan

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Permatasari, Denny, and Nur Iriawan. "PEMODELAN KURVA IMBAL HASIL OBLIGASI KORPORASI RATING AA DAN A DENGAN NELSON SIEGEL SVENSSON DAN CUBIC SPLINE SMOOTHING." Buletin Ekonomi Moneter dan Perbankan 11, no. 4 (2009): 293–322. http://dx.doi.org/10.21098/bemp.v11i4.463.

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Bond is one of commercial instrument that influence economic sector in Indonesia. Bond transaction can't be made in the market directly, but it has been traded through securities. On average, there are only few bond transactions with the various market prices. Benchmarking is, therefore, needed to be created to determining bond price through yield curve. Through yield curve, the relation between yield of bond with same credit risk (rating) and different time to maturity can be seen. This research is conducted by employing time to maturity to model the yield of some selected corporate bonds wit

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Igboama, Wilfred N., Morufu T. Aroyehun, and Olaide S. Hammed. "Geoelectric Assessment of Regolith Aquifer and Its Vulnerability, in a Typical Basement Complex Terrain, Southwestern Nigeria." Malaysian Journal of Science 44, no. 1 (2025): 42–54. https://doi.org/10.22452/mjs.vol44no1.6.

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Assessment of groundwater potential cum regolith aquifer protective strength was carried out using the electrical resistivity method at Ikole Ekiti, Southwestern Nigeria, to assess its viability and susceptibility. The Vertical Electrical Sounding (VES) technique using the Schlumberger array was adopted. The acquired data was partially curve-matched, forward-modelled, and iterated using WinResist version 1.0 software. Charts, para sections, tables, and maps were generated from the results obtained to aid interpretations. The KH curve type, which indicates good protective capacity, is more pred

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Zhang, Tian, Haonan Chen, Xinjia Cui, Pengfei Li, and Yunfeng Zou. "Condition Rating Prediction for Highway Bridge Based on Elman Neural Networks and Markov Chains." Applied Sciences 14, no. 4 (2024): 1444. http://dx.doi.org/10.3390/app14041444.

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Bridges are a critical component of transportation infrastructure, playing a vital role in connectivity. The safe operation of bridges demands significant resource and capital investment, particularly as the operation phase is the most extended period in a bridge’s life cycle. Therefore, the efficient allocation of resources and funds is crucial for the maintenance and repair of bridges. This study addresses the need to predict changes in bridge condition over time. The commonly used state-based Markov chain method for bridge condition rating prediction is straightforward but limited by its as

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TAMURA, Takao, Akito YAMASHITA, and Yasunori MUTO. "A METHOD FOR ESTABLISHING STAGE-DISCHARGE RATING CURVE BY USING RAINFALL, WATER LEVEL DATA AND RUNOFF MODEL." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 70, no. 4 (2014): I_379—I_384. http://dx.doi.org/10.2208/jscejhe.70.i_379.

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Shafeeq-Ur-Rehman and Muhammad Mudassar Abbasi. "Derivation of Rating Curve for Suspended Sediment Flow of River Indus at Besham." Qlantic Journal of Social Sciences 5, no. 3 (2024): 340–52. https://doi.org/10.55737/qjss.v-iii.24097.

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This study aims at reclaiming the huge amount of wastewater, produced from pulp and paper industry by physico-chemical treatment method following a combination of primary settling, coagulation-flocculation aided clarification (alum, lime and magnesium sulphate as coagulant) and activated carbon adsorption, in order to reduce the quantity of wastewater generation, from this water intensive industry. The chemical secondary treatment indicate the reduction in turbidity (89%), COD (84%), Total Suspended Solids (90%) and colour (89%) was obtained at the mass loading of 3400 mg l-1 of MgSO4, when 4

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Petersen-Øverleir, Asgeir. "Fitting depth–discharge relationships in rivers with floodplains." Hydrology Research 39, no. 5-6 (2008): 369–84. http://dx.doi.org/10.2166/nh.2008.303.

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A statistical method based on a simple uniform flow depth–discharge model for a two-stage main channel-floodplain river section has been developed and tested for data from four hydrometric gauging stations. The depth–discharge rating curve fitting procedure is formulated as a piecewise regression problem. A simulated annealing algorithm is used to obtain the least-squares rating curve parameters, including the main channel-floodplain change-point. Uncertainty of all parameter and discharge estimates is approximated by bootstrap techniques. The application of the methodology to field data showe

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Dwisetyo, Bondan, Maharani Ratna Palupi, Fajar Budi Utomo, et al. "IMPLEMENTATION OF LABORATORY MEASUREMENT OF AIRBORNE SOUND INSULATION BASED ON ISO AND ASTM STANDARDS IN NATIONAL STANDARDIZATION AGENCY OF INDONESIA (BSN)." Jurnal Standardisasi 23, no. 1 (2021): 77. http://dx.doi.org/10.31153/js.v23i1.861.

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<p>The implementation of laboratory measurement of airborne sound insulation based on ISO and ASTM standards was carried out at SNSU BSN. The aim of this work to realize the measurement of airborne sound insulation for several sample tests, where the procedure of the test is performed according to the updated standard ISO 10140 and ASTM E90. Besides, the single number rating also is determined based on ISO 717-1 and ASTM E413. This measurement has been conducted in the two reverberation rooms using pressure method consist of measuring the sound pressure level, measuring the reverberation

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Tung, Vu, Nguyen Thong, Nguyen Mai, et al. "Diagnostic Value in Screening Severe Depression of the Hamilton Depression Rating Scale, Hamilton Anxiety Rating Scale, Beck Depression Inventory Scale, and Zung’s Self-Rating Anxiety Scale Among Patients with Recurrent Depression Disorder." Acta Informatica Medica 31, no. 4 (2023): 249. http://dx.doi.org/10.5455/aim.2023.31.249-253.

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Background: Depression is a widespread and incapacitating mental health disorder that impacts millions of people worldwide, playing a substantial role in the overall global health challenges. Depression has a big impact on a person’s quality of life, cognitive and social functioning, risk of suicide, risk of heart disease and other illnesses, as well as death from all causes. . Objective: Objective: It may be challenging to choose the best tools to screen for severe depression in patients with recurrent depression disorder (PRD) considering the diversity of psychological scales in Vietnam. The

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Lee, T. Y., J. C. Huang, A. E. Carey, S. C. Hsu, K. Selvaraj, and S. J. Kao. "Uncertainty in acquiring elemental fluxes from subtropical mountainous rivers." Hydrology and Earth System Sciences Discussions 6, no. 6 (2009): 7349–83. http://dx.doi.org/10.5194/hessd-6-7349-2009.

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Abstract. Mountainous watersheds in high standing islands of the western tropical and subtropical Pacific have received great international attention regarding its high physical and chemical weathering rates caused by cyclone invasion, friable lithology and high tectonic activity. Since mountainous region is usually difficult to assess, particularly, during severe weather conditions, hydrological responses of elements against full-scale of water discharge (often >2 orders of magnitude) are rarely reported. In this study, we conducted discrete sampling (~3 day interval) throughout four seaso

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Kao, Shih Feng, Yu Shiang Wu, and Chi Jan Huang. "Combined Fireproof and Stuffing Materials Applied to Through-Floor Pipes." Advanced Materials Research 152-153 (October 2010): 1547–50. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1547.

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This study tested four types of fireproof and stuffing materials, including firestop sheets, silicone fire barrier sealant, mineral wool batt, and double agent fire barrier foam, on through-floor pipes and walls. Based on the specifications of the American society for testing and materials (ASTM) E84, a 10 min substrate surface burning test was conducted to test fireproof and stuffing materials. The results indicated that the level of fireproof material substrates reached the level of class A in ASTM E84. Combination methods A and B were tested by 180 min heating for specimens, according to th

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Lee, Jong-Seok, Chi-Gon Kim, and Eui-Geen You. "Derivation Method of Rating Curve and Relationships for Flow Discharge-Total Sediment at Small-Midium Streams in Agrarian Basin." Journal of the Korea Contents Association 15, no. 8 (2015): 544–55. http://dx.doi.org/10.5392/jkca.2015.15.08.544.

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Hooten, W. Michael, Constantine G. Lyketsos, and Mark Mollenhauer. "Use of the Brief Psychiatric Rating Scale as a Predictor of Psychiatric Admission for Non-Suicidal Patients." International Journal of Psychiatry in Medicine 28, no. 2 (1998): 215–20. http://dx.doi.org/10.2190/1yvh-lbff-qjrd-r2et.

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Objective: We hypothesized that a systematic determination of symptom severity would predict psychiatric admission for non-suicidal patients referred for a psychiatric evaluation in an urban emergency department (ED) setting. Method: In a pilot study involving consecutive patients referred for a psychiatric evaluation in an urban ED, symptom severity was quantified using the Brief Psychiatric Rating Scale (BPRS). The BPRS scores of all non-suicidal patients were subjected to receiver operator characteristic (ROC) curve analysis to determine the sensitivity, specificity, and optimal cutoff scor

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Hansen, David, Vinod K. Garga, and D. Ronald Townsend. "Selection and application of a one-dimensional non-Darcy flow equation for two-dimensional flow through rockfill embankments." Canadian Geotechnical Journal 32, no. 2 (1995): 223–32. http://dx.doi.org/10.1139/t95-025.

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Porous embankments comprised of relatively homogeneous coarse rockfill can be used to reduce the amount of spillage at downstream hydro dams or to control the outflow from stormwater detention basins. The stage-discharge rating curve is important in the design of such applications. In general, the coarseness of the material causes the flow to be non-Darcy; that is, characterized by a nonlinear relationship between bulk velocity and hydraulic gradient. Six one-dimensional (1D) non-Darcy flow equations, appearing in the literature, are presented. A limited comparison between computed and experim

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Lafit, Ahmad Fahrul, Togani Cahyadi Upomo, Yeri Sutopo, and Agung Sutarto. "Defleksi Lateral Tiang Tunggal Akibat Beban Lateral pada Tanah Pasir." INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur 17, no. 2 (2021): 83–95. http://dx.doi.org/10.21831/inersia.v17i2.27092.

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ABSTRACTOne type of deep foundation is a pile foundation that is designed and has the ability to withstand axial, lateral, and uplift loads. This analysis aims to determine and compare deflections that occur on poles that are in granular soil by using the manual calculation of the p-y curve method with finite difference approaches and calculations with Allpile and Plaxis software. The analysis was conducted three times, namely on a 60 cm diameter pole at a depth of 10 meters embedded pile with lateral loads of 25 kN, 50 kN, and 75 kN. The data used to calculate the lateral deflection of the po

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