Revisiting water resources management in the Mandara Mountains by Diane Madomguia, Esther Laurentine Nya, Emma Laureane Njomou-Ngounou, Nadège Gatcha-Bandjun, Tulinave Burton Mwamila, Jules Balna, Emina Halimassia, Jules Metsebo, Wilfried Arsène Letah Nzouebet, Raoul Rodrigue Tchoumbe, André Firmin Bon, Willis Gwenzi, Chicgoua Noubactep

“…RWH is a small-scale water conservation approach for locally intercepting and storing rainfall before it enters the usual hydrologic cycle. This ancient practice has recently sustained lives in semiarid areas of the world (e.g. …”
Get full text

Hydrogeological structure of shallow-buried coal seam in wind erosion landform area and water-retaining coal mining method by MENG Fanlin, LI Jiashan, SUN Zhihao, CAI Jin, QIAO Wei, WANG Qiqing, WU Huijie

“…We then analyzed the hydraulic connection between the water bodies in the mining area and the impact caused by mining based on the hydrological observation hole water level data in the study area. …”
Get full text

Energy-related contaminants in subterranean waterbodies: The role of geocolloids on facilitated and hindered transport by Mustafa E.S. Akbulut, Younjin Min

“…This article critically reviews contemporary studies on the influence of aqueous geocolloids in modulating the transport kinetics of energy-related contaminants within subterranean hydrological systems. The primary objectives of this work are to: i) introduce the morphological and physicochemical properties of prevalent geocolloid varieties and explain their formation mechanisms, ii) outline the mechanistic pathways by which geocolloids alter contaminant transport dynamics, and iii) analyze the ramifications for applications such as coal mining, hydraulic fracturing, chemically-enhanced oil recovery, and radionuclide storage. …”
Get full text

Crisis management and warning procedures by Valérie November, Reynald Delaloye, Marion Penelas

“…Based on two flood events that recently affected new housing areas in very different political, organisational and hydrological contexts, this article examines the practices of actors involved in emergency and crisis situations in Switzerland. …”
Get full text

Richards equation for the assessment of landslide hazards by Ramesh Chandra Timsina

“…To extend its application, we integrate the numerical solution with a hydrological infinite slope stability model to evaluate landslide hazards. …”
Get full text

Assurer la maitrise du ruissellement grâce aux zones humides au voisinage des infrastructures de transport dans une perspective de conservation de la biodiversité by Camille Fressignac, Pascal Breil, Yannick Matillon, Andréa Nullans, Blandine Chazelle, Benoît Sarrazin, Dominique Vallod

“…It then introduces the approach of the success factors which are: (1) convince the designer and the operator of the appropriateness of a redesigned management of storm water and (2) to benefit from operational space methods for the detection and evaluation of favorable hydrological and ecological contexts within landscapes. …”
Get full text

Areas simultaneously susceptible and (dis-)connected to debris flows in the Dolomites (Italy): regional-scale application of a novel data-driven approach by Felix Pitscheider, Stefan Steger, Marco Cavalli, Francesco Comiti, Vittoria Scorpio

Get full text

Characteristic Analysis of Annual Sediment Transport Modulus of Xijiang River Basin in Guangxi over Last 60 Years by ZHU Yingjie

“…Mann-Kendall rank correlation test,Spearman rank correlation test and Mann-Whitney-Pettitt abrupt change point analysis were performed to study the trend and mutation components of the annual sediment transport modulus of the Xijiang River Basin.Then,the kriging interpolation method was used for spatial interpolation in the mean and trend of the annual sediment transport modulus.After a double cumulative curve was drawn,the hydrological analysis method was employed to examine the causes of the changes in the annual sediment transport modulus.The results show that the average annual sediment transport modulus of the Xijiang River Basin increased in the 1960s—1970s but kept decreasing in the 1980s.The multi-year sediment transport modulus drops gradually from west and east to northeast in the 1960s,from outer to central in the 1970s,from northwest and east to south and northeast in the 1980s,from northwest and east to central and northeast in the 1990s,and from east and west to north in 2000—2009.In general,the multi-year average sediment transport modulus of the upper reaches is greater than that of the middle and lower reaches.Without the influence of precipitation change,the variation of the annual sediment transport modulus of the Xijiang River mainly results from human activities affecting the erosion and sediment yield of the basin.The contribution rate of precipitation change to the sediment transport modulus is 6.3%~12.3%,whereas that of human activities is 87.7%~93.7%.…”
Get full text

Research on Runoff Prediction Based on EMD-FBI-ELM Model by ZHANG Yajie, CUI Dongwen

“…,EMD-FBI-SVM,FBI-ELM and FBI-SVM.Finally,the EMD-FBI-ELM,EMD-FBI-SVM,FBI-ELM and FBI-SVM models are verified and analyzed with the annual runoff at the Gulaohe River Hydrological Station in Yunnan Province as a prediction example.The results show that the average relative error of the EMD-FBI-ELM model is 3.97% for the annual runoff prediction,which is 53.9%,81.7% and 86.5% lower than those of the EMD-FBI-SVM,FBI-ELM and FBI-SVM models,respectively.The EMD-FBI-ELM model is feasible for runoff prediction,and the model and optimization method can provide reference for relevant prediction research.…”
Get full text

Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method by CHEN Quanfu, LI Xungui

“…In recent years, significant changes in hydrological and engineering conditions have been observed in the Yujiang River basin, and climate anomalies have increased flood control pressures. …”
Get full text

Monthly Runoff Prediction Based on STL-CEEMDAN-LSTM Model by WANG Hai, SHEN Yanqing, QI Shansheng, PAN Hongzhong, HUO Jianzhen, WANG Zhance

“…The model was validated with measured monthly runoff data from Tangnaihai hydrological station in the upper reaches of the Yellow River and was compared and analyzed with other models. …”
Get full text

Research on Impacts of Climate Change and Human Activitieson Runoff in the Yiluo River Based on SWAT Model by LIU Lyuliu, WANG Xiujie, ZHANG Pengfei

“…Taking Yiluo River in the Yellow River Basin as the research object, this paper analyzes the impacts of numbers of HRUs (Hydrological Response Units) on SWAT model parameters and simulation performance and applies it on the attribution analysis of the change on annual runoff in Yiluo River by comparing among six HRUs division schemes. …”
Get full text

Design of a Water Quality Monitoring Network on the Zimkan River in Kermanshah by Iraj Jabbari

“…The indices were combined together according to topographical and hydrological effect on contamination movement to main stream and then the vulnerable reaches was introduced. …”
Get full text

Influence of Tianjiaotan Hydraulic Project on Ecology of Mangrove Forest in Xinying Bay by WEN Jizhou, ZHAO Guanghui, WANG Lang, ZHANG Zhiguang, ZHANG Shalong, LI Mei

“…The construction and operation of Tianjiaotan Reservoir have changed the hydrological characteristics of Beimen River channel under the dam and affect the area of dilution zone,salinity,saltwater intrusion distance,and sediments in Beimen River estuary,which will further affect the growth and reproduction of the mangrove forest in Xinying Bay.This article investigates the current ecological status of the mangrove forest in Xinying Bay of Beimen River and establishes a mathematic model for planar two-dimensional salinity diffusion in Beimen River estuary by adopting three key factors affecting the growth and reproduction of the mangrove forest,such as the area of dilution zone,salinity,and saltwater intrusion distance.In addition,the article analyzes the influence of Tianjiaotan hydraulic project on the ecology of the mangrove forest.The results show that the salinity change of the estuary has little effect on the adult plants in the mangrove forest (with growth stress mainly observed) but limits the growth and development of seedlings.The increase in saltwater intrusion distance in the flood season can stimulate the upward development of the mangrove forest along the river;the decrease in the area of dilution zone in Xinying Bay may change the structure of the mangrove community in the estuary in a way that benefits the growth of salt-tolerant mangrove plants such as Avicennia marina and Rhizophora stylosa and affects the growth and development of salt-intolerant mangroves plants.The research results can provide a theoretical basis for the ecological conservation of the mangrove forest in Xinying Bay.…”
Get full text

Characterization of paleodrainages in desert regions of Saudi Arabia multisatellite images with field based study by Mashael M. Al Saud

“…Hydro-geomorphological-based categorization of these paleodrainages was carried out, indicating the majority of SW-NE trending and the presence of routes, unconsolidated sediments and rocks. From the hydrological point of view, these paleodrainages are potential for groundwater storage; and they can be also suitable sites for artificial groundwater recharge; be-sides they represent routs for saltwater intrusion on-land; and these science-based clues represent supportive element for better water resources management in Saudi Arabia.…”
Get full text

Modelling of flood hazard using topographic wetness index in Yeh Ho Watershed, Bali, Indonesia by Adnyana I Made, Wiguna Putu Perdana Kusuma

“…Topographic Wetness Index (TWI) is a method of quantifying topographic control of hydrological processes. This research aims to determine the spatial distribution of flood hazard areas using the TWI method in the Yeh Ho watershed, one of the largest watersheds in Bali Province, Indonesia. …”
Get full text

Study on Variation Law and Influencing Mechanism of Water and Sediment in Henan Reaches of the Yellow River by XUAN Xiaobo, DOU Ming, LIU Bojun

“…The Henan reaches of the Yellow River is a typical wandering reach, which has a severe impact on the river habitat due to the severe variation of water and sediment, frequent swing of the main channel, and serious deformation of the riverbed.Based on the water and sediment data of Xiaolangdi, Huayuankou, and Gaocun hydrological stations from 1960 to 2019, this paper explores the variation cycle characteristics of water and sediment in the Henan reaches of the Yellow River by using statistical methods such as Mann-Kendall test, sliding T test, and wavelet analysis.The contribution rate of rainfall and human activities to the decrease in runoff and sediment transport in the Henan reaches of the Yellow River is quantitatively evaluated by the double mass curve method.The results show that the decreasing trend of annual sediment transport is greater than that of annual runoff in the Henan reaches.From Xiaolangdi to Huayuankou, erosion and deposition are basically balanced, and from Huayuankou to Gaocun, deposition is dominant.The flood season in the Henan reaches is dominated by sediment deposition, and the non-flood season is dominated by scour.The sediment transport in Xiaolangdi station changed greatly in 1997, while the runoff and sediment transport in Huayuankou and Gaocun stations changed significantly in 1985.The water and sediment regulation greatly increases runoff instead of sediment transport.Human activities play a leading role in the decrease in runoff and sediment transport in the Henan reaches of the Yellow River, with an average contribution rate of 80.94% to runoff and 94.95% to sediment transport in the Henan reaches of the Yellow River.…”
Get full text

Data-Driven-Based Attribution of Runoff Changes in Tuwei River Basin in the Northern Windy-Sandy Region of Shaanxi by YU Huanghao, LI Binquan

“…The key point in analyzing the attribution of runoff changes is whether the natural runoff process of the basin can be accurately simulated.However,the application accuracy of hydrological models in arid and semi-arid regions of the Loess Plateau is generally not high.Taking the Tuwei River basin in the northern windy-sandy region of Shaanxi in the middle reach of the Yellow River as an example,this paper proposed an improved natural runoff simulation method based on the data-driven approach,so as to quantitatively analyze the effects of climate changes and human activities on runoff changes in the Tuwei River basin.The results show that the annual runoff series in the basin decreased significantly from 1961 to 2015,and there were two abrupt changes in 1979 and 1996,respectively.The annual runoff of the two periods (1980—1996 and 1997—2015) is 25.8% and 47.1% lower than that of the natural period (1961—1979),respectively.The runoff simulation accuracy of the three data-driven methods after improvement rises significantly.Specifically,the improved method proposed by Zhao Wenlin has the highest accuracy,and the Nash-Sutcliffe efficiency coefficient of annual runoff simulation in the natural period is 0.77.Climate change is the main reason for the significant decrease in the runoff between 1980 and 1996 (with a contribution of up to 80.9%).However,from 1997 to 2015,the contribution of climate change and human activities to the decrease in the runoff changed,with the influence of human activities increasing to a proportion of 58.8%.…”
Get full text

Flood Period Classification Forecast Based on Information Fusion and Recognition by XIE Zhigao, LIU Xia, WU Hengqing, LIU Jin

“…To solve the low simulation accuracy of flood forecast models caused by limited historical flood data in river basins,this paper employs the K-means clustering method to cluster typical floods by taking reservoir A as the research object.Meanwhile,it analyzes hydrological influencing factors such as rainfall intensity,rainfall center,and weather system,calculates various parameters of confluence models through a genetic optimization algorithm,and adopts a rough set method to explore the relationship between influencing factors and flood period confluence patterns.Finally,the flood period classification forecast based on information fusion and recognition is conducted.The results are as follows:① The absolute and relative errors of the four selected typical floods calculated by the classification forecast method are 9.01 m³/s and 2.95%,116.46 m³/s and 6.78%,30.92 m³/s and 17.55%,and 6.12 m³/s and 1.86% respectively;② The simulation accuracy of the flood classification forecast model built in this paper is higher than that of the traditional forecast methods,and the determination coefficients of different typical floods are all above 0.8.The results can provide references for the flood period classification and forecast in north China and other regions with less flood data.…”
Get full text

Changes in Sediment Flux from Hanjiang River into the Sea and Its Influence on Adjacent Sea Areas over the Last 60 Years by WANG Yufei, LIU Xiujuan, WANG Yang, WANG Wanhu, WANG Hongbing, YI Jiaji

“…In order to study the changes in sediment flux from the Hanjiang River into the sea and its environmental effects over the last 60 years,this paper uses the Mann-Kendall method to test the runoff discharge and sediment flux measured by the Chao'an hydrological station from 1958 to 2019,analyzes the main driving factors affecting the changes of sediment flux,and investigates the impact of sediment flux changes on adjacent sea areas.The results show that there is no significant change in runoff discharge for the Hanjiang River.The sediment flux into the sea has significantly decreased since 1998,and it has dropped more sharply since 2001.The large hydropower stations (Qingxi and Mianhuatan hydropower stations) in the Hanjiang River Basin are the main factors that lead to the significant decrease in the sediment flux into the sea.Since the sediments into the sea decreases greatly at the end of the 1990s,adjacent sea areas near the Hanjiang estuary have witnessed a transformation from slight sedimentation during 1971—2010 to slight erosion during 2010—2016 and a change of the delta shoreline from progradation (2.40~5.38 m/a) during 1830s—1964 to relative stability in 1980s.These findings indicate that the remarkable decrease in sediments from the Hanjiang River into the sea has greatly affected adjacent sea areas near the estuary.…”
Get full text