SERGHEI v2.0: introducing a performance-portable, high-performance, three-dimensional variably saturated subsurface flow solver (SERGHEI-RE) by Z. Li, G. Rickert, N. Zheng, Z. Zhang, I. Özgen-Xian, D. Caviedes-Voullième, D. Caviedes-Voullième

“…<p>Advances in high-performance parallel computing have significantly enhanced the speed of large-scale hydrological simulations. However, the diversity and rapid evolution of available computational systems and hardware devices limit model flexibility and increase code maintenance efforts. …”
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Study on Forecasting Method of Runoff Recession in Dry Season in Lincang City by ZHANG Zhenjie, LI Cheng, LI Zengguo

“…It is particularly important to make a good forecast of recession inthe dry season, master the law of recession, and provide a prediction of water volume in the dryseason for the government decision of urban water supply and agricultural drought resistance.Taking the analysis of recession law of Xihe (2) hydrological station as an example and combiningwith the hydrological characteristics of river runoff in Lincang City, this paper introduces twoforecasting methods of recession in dry season, that is, seasonal recession curve and thecorrelation analysis of runoff before and after the season. …”
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An Assessment of Human versus Climatic Impacts on Jing River Basin, Loess Plateau, China by Yi He, Fei Wang, Xingmin Mu, Huiting Yan, Guangju Zhao

“…The method could be used combining with the traditional methods in hydrological research.…”
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Florida's Water Resources by Roy R. Carriker, Tatiana Borisova

“…Carriker and Tatiana Borisova, provides an overview of Florida’s water resources organized with reference to the hydrologic cycle. Includes references. Published by the UF Department of Food and Resource Economics, December 2008. …”
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Florida's Water Resources by Roy R. Carriker, Tatiana Borisova

“…Carriker and Tatiana Borisova, provides an overview of Florida’s water resources organized with reference to the hydrologic cycle. Includes references. Published by the UF Department of Food and Resource Economics, December 2008. …”
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A Comparative Analysis of Data-Driven Empirical and Artificial Intelligence Models for Estimating Infiltration Rates by Mohammad Zakwan, Majid Niazkar

“…Finally, based on the comparative analysis, implementation of AI-based models, as a more accurate alternative, is suggested for estimating infiltration rates in hydrological models.…”
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Analysis on Changes in Water Level-Flow of the Pearl River Basin in Recent Years and Its Causes by TANG Jiaqi, DUAN Kai, HAO Lu

“…Aiming at the impact of climate change and rapid urbanization on the hydrological situation in the Pearl River Basin in recent years,this paper analyzes the evolution trend and variation characteristics of the water level,flow and water level-flow of 16 major hydrological stations in the Pearl River Basin from 1997 to 2013,and discusses the causes of the evolution of water level and flow in each sub-basin based on the meteorological,hydraulic engineering,and water and sediment data in the historical period.The results show that:①The average annual flow of most stations in the Pearl River Basin didn't change significantly,but the Jiangbianjie,Chongwei and Liuzhou stations in the Xijiang River Basin showed a significant reduction trend;②The flow of most stations in the flood season decreased,while that in the dry season increased.The different precipitation during the dry/flood season was the important factors leading to the change of flow in the Pearl River Basin;③The water level of most stations in the Xijiang River Basin showed a significant upward trend,which was caused by the aggravating water and soil loss.While under the influence of reservoir operation and sand mining activities,the Beijiang River Basin and the lower reaches of the Dongjiang River Basin showed a trend of riverbed down-cutting and water level lowering.…”
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Cumulative Effect of Cascade Hydropower Development on Ecological Environment of Main Stream of Jinsha River by ZHOU Yang, YANG Jun

“…In the hydrological aspect, it is revealed that after dam construction, conspicuous runoff flattening, significant sediment interception, and water temperature stratification occur. …”
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Response of Runoff and Sediment Yield from Maize Slope Farmland in Karst Areas to Slope Gradient by WU Guangqin, DAI Quanhou, WANG Yong, DING Pengwei, YAO Yiwen

“…[Objective] To elucidate the responses of surface runoff, subsurface runoff, and underground runoff hydrological pathways to slope in maize sloping farmland in Karst regions. …”
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Estimating Potential Evapotranspiration by Missing Temperature Data Reconstruction by Eladio Delgadillo-Ruiz, Eusebio Jr. Ventura-Ramos, Julián González Trinidad, Hugo Enrique Júnez-Ferreira, Carlos Francisco Bautista-Capetillo, Olivia Delgadillo-Ruiz

“…This work studies the statistical characteristics of potential evapotranspiration calculations and their relevance within the water balance used to determine water availability in hydrological basins. The purpose of this study was as follows: first, to apply a missing data reconstruction scheme in weather stations of the Rio Queretaro basin; second, to reduce the generated uncertainty of temperature data: mean, minimum, and maximum values in the evapotranspiration calculation which has a paramount importance in the manner of obtaining the water balance at any hydrological basin. …”
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Training and Testing Data Division Influence on Hybrid Machine Learning Model Process: Application of River Flow Forecasting by Hai Tao, Ali Omran Al-Sulttani, Ameen Mohammed Salih Ameen, Zainab Hasan Ali, Nadhir Al-Ansari, Sinan Q. Salih, Reham R. Mostafa

“…The hydrological process has a dynamic nature characterised by randomness and complex phenomena. …”
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Hydrodynamic Characteristics and Riverbed Evolution Analysis of the Bazizui Straight Branching Channel in Xinjiang River Based on MIKE21 by HU Kelong, JI Yong, CEN Yixing, ZHONG Heye, ZHANG Yue, ZHANG Lichen, WANG Yin, ZHANG Jie

“…To clarify the hydrodynamic characteristics and riverbed evolution trend of the branching channel bank in the Bazizui shipping section of Xinjiang River,this paper builds the two-dimensional mathematical model of the research water area by MIKE21 hydrodynamic module.It employs the hydrological data of Meigang Station to calibrate the model and verify the accuracy.On this basis,the hydrodynamic characteristics in different hydrological periods of the straight branching channel of Xinjiang River are analyzed,and the evolution trend of the branching channel section is clarified.The results show that the left branch is the main water branch,and the diversion ratio of the diversion channel decreases with the increase in flow.The velocity of flow is irregularly distributed and varies significantly between regions.The main stream appears in the left branch of the diversion section,and the maximum flow velocity is confirmed in the narrow part.The water level decreases uniformly from the diverging area to the confluence area.The overall stability of river pattern development and evolution is good,and the evolution of the water channel is mainly reflected in the local changes of riverbed scouring and silting in branching channels.The model can effectively simulate the diversion ratio and water level variation of the branching channel,which can provide a scientific basis for the study of river safety protection and navigation stability.…”
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Meteorological drought assessment using SPI and RDI indices in the Ourika Basin, Morocco by Khrabcha Abdelali, Oumou Abdellah, Essahlaoui Ali, Essahlaoui Narjisse, Kassou Amina, Mouzoun Ouafae, Alitane Abdennabi, El Hafyani Mohammed, Iharzi Chaimae, Van Rompaey Anton

“…The aim of our study is to evaluate and monitor meteorological and hydrological droughts in the Ourika basin during the experimental period from 1980 to 2019. …”
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Comparison of Three Statistical Downscaling Methods and Ensemble Downscaling Method Based on Bayesian Model Averaging in Upper Hanjiang River Basin, China by Jiaming Liu, Di Yuan, Liping Zhang, Xia Zou, Xingyuan Song

“…Many downscaling techniques have been developed in the past few years for projection of station-scale hydrological variables from large-scale atmospheric variables to assess the hydrological impacts of climate change. …”
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Monthly Runoff Forecasting Model Based on Electrostatic DischargeAlgorithm-Mixed Kernel SVM and Its Application by LI Xiangrong

“…In order to improve the accuracy of hydrological forecasting, this paper establishes a support vector machine (SVM) based on the mixture of polynomial kernel and Gauss kernel, optimizes the key parameters and the mixed weight coefficients of mixed kernel SVM by the electrostatic discharge algorithm (ESDA), proposes a monthly runoff forecasting model in dry season based on mixed kernel ESDA-SVM, builds the Gauss kernel ESDA-SVM, polynomial kernel ESDA-SVM and ESDA-BP, as contrast forecasting models, as well as conducts the forecasting through the models with the data of the first 24 years and the last 10 years, taking the monthly runoff forecasting of a hydrological station in Yunnan from January to April in dry season as an example. …”
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Application of Load Duration Curve Method in Pollution Control in the Middle and Lower Reaches of Hanjiang River by ZHAO Chen, CHEN Yanfei, DONG Yuru, SUN Yongxi

“…The load duration curve method is used to study both water quality change and pollution load.This study aims to examine the effect of pollution control in the middle and lower reaches of the Hanjiang River and puts forward reasonable pollution control measures.For this purpose,the load duration curves of total phosphorus,COD_Mn,and ammonia nitrogen are drawn according to the hydrological data and water quality data for 2006—2020,with water pollution prevention and control and the local water quality requirements as the design water quality objectives.The relationships among water flow,water quality,and pollution load are thereby established.The results show that under the corresponding specified surface water quality,the COD_Mn,ammonia nitrogen,and total phosphorus indexes of the Huangzhuang section all meet the requirements,and the residual load is large,which means that no reduction measures are needed.Regarding the Xiantao section,reduction measures are also unnecessary for COD_Mn and ammonia nitrogen,which,nevertheless,is not the case for the high and low flow areas of total phosphorus.The reduction amounts for the two areas are 6.05 t/d and 0.09 t/d,respectively.This study provides technical support for water quality compliance management under different hydrological conditions of the river.…”
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Field evidence of flocculated sediments on a coastal algal reef by Zhi-Cheng Huang, Tian-Jian Hsu, Trung Nguyen Ly

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Joint Operation of Reservoir Group in Longxi River Basin Considering Agricultural Water Demand by CHEN Si, XU Wei, ZHAO Siqi, YIN Shiming, YANG Yi

“…Water resources in small- and medium-sized basins are often not reasonably allocated,and the utilization rate of water resources is not high.In this paper,five reservoirs in the Longxi River Basin are taken as an example.Firstly,the hydrological model is constructed,and the parameters of the model are calibrated and verified by the 12-year measured runoff of Liujiantan Hydrological Station.The NSE can reach 0.89,the R² is 0.87,and the relative error (RE) is 5.4 %.The inflow process to the reservoir interval is obtained.Secondly,three representative crops of corn,rice,and sweet potato in the basin are selected to construct the reservoir irrigation water demand model.The crop coefficient method and Penman-Monteith formula are adopted to calculate the crop water demand and the USDA-SCS method was used to calculate the effective precipitation.Finally,the joint and single reservoir operation models of the Longxihe reservoir group to maximize the comprehensive water supply and power generation are built,and the POA solution and fuzzy analytic hierarchy process are utilized to optimize the scheme.The results show that the joint operation is more capable to balance the distribution of water resources between upstream and downstream reservoirs,improve the power generation efficiency and water supply guarantee rate,and reduce the amount of abandoned water than the single reservoir operation.…”
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Risk Identification of Severe Flood and Drought in Minjiang River Basin by WU Jing

“…To improve the scheduling plan for extreme hydrological events and severe drought and flood risks in the Minjiang River Basin, this paper employs the standardized runoff index SRI and standardized precipitation index SPI to identify and analyze the severe flood and drought risks in Minjiang River Basin according to the historical observation data of the basin.The results are as follows.①First, according to the drought and flood analysis on the time scale of year, there are four typical years in total including the typical drought years of 2003 and 2004 and the typical flood years of 1998 and 2016.The flood occurrence frequency is relatively low in the areas with high drought frequency in the Minjiang River Basin.②Second, according to the seasonal time scale analysis of drought and flood, the risk years of severe drought and flood in Minjiang River Basin in four seasons can be obtained, in which the spring and summer are dominated by extreme drought, and the autumn and winter are dominated by extreme flood.Meanwhile, the Z value of the four seasons SPI3 in Minjiang River Basin has a certain changing trend except in spring.In summary, the research results can provide basic data and technical support for coping with extreme hydrological events of drought and flood in the Minjiang River Basin in the future, and formulating emergency dispatching plans for severe drought and flood risks.…”
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NATURAL ICE MOUNDS OF THE MIDDLE AND SOUTHERN SAKHALIN MUDFLOW BASINS by Svetlana V. Rybalchenko, Konstantin V. Verkhovov

“…The mechanism of ice data formation is due to the hydro/meteorological features of the territory, as well as disturbance of the thermal, hydrological or hydrogeological regime of the debris flow basin. …”