Study on the Annual Variation Characteristics of Runoff in Yunnan by GU Guihua, LI Xuehui, YU Shoulong, DUAN Lusong

“…To study the annual variation characteristics of runoff in Yunnan Province and analyze the main influencing factors,based on the observed monthly and annual rainfall and runoff data of 9 representative hydrological stations in 6 major river basins in Yunnan from 1956 to 2016,this paper analyzes the annual runoff distribution in terms of the uniformity,concentration and relative variation range.The research shows that:①The uniformity coefficient (C_u) of runoff distribution in many years ranges from 0.55 to 1.21,and the concentration (C_n) ranges from 0.23 to 0.66,so the runoff is unevenly distributed in the whole province.②The C_u and C_n decrease in general.Especially after 2000,the annual distribution of runoff shows a trend of uniformity.③The runoff concentration is relatively high in the Yangtze River Basin and the Honghe River Basin,and the annual runoff distribution is flat in the Lancang River Basin and the Zhujiang River Basin.④The uniformity trend of annual runoff distribution is closely related to human activities in the basin.…”
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Aspectos socioambientais e socioterritoriais das comunidades atingidas por hidrelétricas no estado do Amapá by Daguinete Maria Chaves Brito, José Augusto Leitão Drummond

“…The main results indicate that reservoirs cause environmental impacts (forest submersion, habitat fragmentation, changes in rivers’ hydrological regimes) and cause irreversible socio-environmental damage (blocking access to natural resources and even causing the relocation of communities, as occurred with residents who lived around the Santo Antônio do Jari plant.Amapá, riverside communities, reservoirs, territory, energy policy.…”
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Analysis of Spatio-temporal Evolution of Land Use and Landscape Pattern in Liuxi River Basin Driven by Rapid Urbanization by ZHU Zhenjie, YANG Zibo, LIU Bingjun

“…Since the implementation of the policy of reform and opening up,the dramatic evolution of land use and landscape pattern in basins has been brought about by the rapid development of urbanization,threatening the health of its natural eco-hydrological environment.Taking Liuxi River basin in Guangzhou as research object,this paper uses the land use transition matrix and landscape pattern indexes to analyze the spatio-temporal evolution of land use types and landscape pattern based on the land use data of different years from 1980 to 2015.The results show that:①The arable land,which is one of the dominant landscape in Liuxi River basin,was greatly converted to construction land and gradually fragmented and homogenized,resulting in the fragmentation and homogenization of landscape pattern in whole basin;②The dramatic changes of land use types and landscape pattern mainly occurred in the middle and lower reaches,especially during the period from 2000 to 2010;③The rapid growth of total population and the increase of proportion of tertiary industry were main urbanization indicators for the conversion of arable land into construction land.…”
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Health Assessment of the Lower Reaches of Longhe River under Watershed Systematic Treatment by YU Binjing, FU Yicheng

“…River health assessment is the basis for watershed planning,systematic treatment,and ecological restoration.The lower reaches of the Longhe River in Langfang suffer fragile ecology and lack water fluidity,showing a poor water environment.To accurately assess the ecological health of rivers severely disturbed by human activities and identify the fragility factors in the ecosystem,we construct a health assessment index system for the Longhe River based on the analytic hierarchy process (AHP).The river health assessment index system consists of five aspects:hydrological integrity,physical structural integrity,chemical integrity,biological integrity,and social function integrity.The Langfang section of Longhe River is generally in a healthy state with a health assessment score of 75.18.According to the assessment results,the Longhe River watershed has problems such as large development and utilization of water resources,low wetland retention rate,serious artificial disturbance in the riparian zone,and poor quality of the upstream water.The proposed assessment method could provide a reference for the health assessment of rivers under severe artificial control.…”
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Flood Forecasting for Small Reservoirs Based on Neural Networks by PENG Wei, XIONG Jiayi, JIANG Xianqun, GAO Yueming

“…In flood forecasting,empirical prediction methods report low accuracy,and traditional hydrological models face the problems of large workloads and difficult promotion when they are applied to small reservoirs.Hence,an artificial neural network (ANN) method is introduced,which is equipped with powerful feature-learning capability.It is combined with the genetic algorithm (GA) to find the optimal parameters for flood forecasting of small reservoirs as GA can realize automatic optimization of the time step and hidden-layer neuron nodes in ANN.In this way,parameter search can be targeted,and personalized flood forecasting models can be constructed for each small reservoir.In addition,the flood forecasting models based on the back propagation (BP),long short-term memory (LSTM),and gated recurrent unit (GRU) neural networks are built,and comparisons between simulations and measured data are conducted for the flood process.The results show that the LSTM model has high prediction accuracy and good stability and can learn and simulate the water-level change pattern of the actual flood process,demonstrating better prediction performance than BP and GRU models.…”
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Snow Reliability and Water Availability for Snowmaking in the Ski resorts of the Isère Département (French Alps), Under Current and Future Climate Conditions by Martin Gerbaux, Pierre Spandre, Hugues François, Emmanuelle George, Samuel Morin

“…The water demand for snowmaking is calculated and can be compared with hydrological simulations of water resource availability, under current and future climate conditions. …”
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Tourism, Social Management of Water and Climate Change in an Area of High Altitude: the Everest Massif in Nepal by Marie Faulon, Isabelle Sacareau

“…It results in a new pressure on water resources since the touristy season and the hydrologic regime are misaligned. However, the pressure must be put into perspective with regard to the way inhabitants organize and plan the infrastructures for collecting and withdrawing water from the rivers. …”
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GRAiCE: reconstructing terrestrial water storage anomalies with recurrent neural networks by Irene Palazzoli, Serena Ceola, Pierre Gentine

“…Abstract The Gravity Recovery and Climate Experiment (GRACE) and its follow-on (GRACE-FO) missions have provided estimates of Terrestrial Water Storage Anomalies (TWSA) since 2002, enabling the monitoring of global hydrological changes. However, temporal gaps within these datasets and the lack of TWSA observations prior to 2002 limit our understanding of long-term freshwater variability. …”
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CASA DE PIEDRA: EFECTOS DE LAS AGUAS CLARAS EN LA HIDROGRAFÍA DEL RÍO COLORADO by Hector Walter Cazenave

“…The construction of Casa de Piedra (Stone House) dam, in the final stretch of Colorado river high valley, radically modified down waters the hydrologic river course, especially regarding sediment transport, the majority of which settles in the lake. …”
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Spatial and Temporal Variation Characteristics of Drought in Guizhou Province Based on VCI and Division of Arid Regions by DAI Renli, ZHONG Jiusheng

“…Due to its unique dual hydrological structure of surface water and groundwater and typical karst low mountain and hilly landform area,the agricultural ecological environment of Guizhou Province is extremely fragile,and it is prone to agricultural disasters caused by meteorological factors,leading to reduced agricultural production.This paper calculates the VCI of Guizhou Province from 2001 to 2018 by remote sensing technology,explores the agricultural drought situation in Guizhou Province,divides the spatial distribution of seasonal arid regions in Guizhou Province with ArcGIS spatial overlay analysis,and analyzes the VCI trend characteristics of Guizhou Province through the unary linear trend method.The results show that:①The seasonal and inter-annual VCI in Guizhou Province generally show a downward trend,most obviously in karst areas,followed by non-karst areas;②Guizhou Province's seasonal droughts are mainly spring and winter droughts,and dry karst areas is a drought-prone area;③The drought time characteristics of Guizhou Province are mainly seasonal continuous drought and three-season continuous drought.…”
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Analysis of flood risk based on WMS model in urban catchment area Case study: Damand basins, Golabdareh and Saadabad, Tehran metropolitan area by amir safari, ali ahmadabadi, zahra sedighifar

“…In this regard, this research aims at integrating the WMS hydrologic model with ARC GIS software to estimate flood zones in the Damand, Goladdareh, Saadabad and Maghsoud Baik watersheds on the main river of Darband. …”
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Casa de piedra dam: effects of clear water on the river Colorado hydrography by Hector Walter Cazenave

“…The construction of Casa de Piedra (Stone House) dam, in the final stretch of Colorado river high valley, radically modified down waters the hydrologic river course, especially regarding sediment transport, the majority of which settles in the lake. …”
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Tourisme, gestion sociale de l’eau et changement climatique dans un territoire de haute altitude : le massif de l’Everest au Népal by Marie Faulon, Isabelle Sacareau

“…It results in a new pressure on water resources since the touristy season and the hydrologic regime are misaligned. However, the pressure must be put into perspective with regard to the way inhabitants organize and plan the infrastructures for collecting and withdrawing water from the rivers. …”
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Numerical Simulation of Thawing Process in Frozen Soil by Zhaoyu Yan, Wei Pan, Junjie Fang, Zihui Liu

“…Permafrost has been thawing faster due to climate change which would release greenhouse gases, change the hydrological regimes, affect buildings above, and so on. …”
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Mapping Evapotranspiration of Agricultural Areas in Ghana by Kenneth Aidoo, Nana Ama Browne Klutse, Kofi Asare, Comfort Gyasiwaa Botchway, Samuel Fosuhene

“…Evapotranspiration (ET) is a major component in the world hydrological cycle, and understanding its spatial dimensions is critical in evaluating the effects it has on regional land use. …”
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Grey Prediction of Mountainous Runoff of Datengxia Based on R/S Analysis by CUI Yanhua, WANG Li, WU Wenqiang

“…Grey prediction model has been widely used in studies on surface hydrological series,but it has not been mentioned in studies on the mountainous runoff of Datengxia.According to the annual measured data of mountainous runoff of Datengxia from 1932 to 2021,the GM (1,1) grey prediction model is established first.Then R/S analysis is carried out to calculate the Hurst index and the average cycle period T of the mountainous runoff series of Datengxia.After that,the grey prediction of the mountainous runoff of Datengxia is performed within a cycle T based on R/S-GM (1,1) model.The results show that the cycle period T of the mountainous runoff of Datengxia is nine years,and the model accuracy of GM (1,1) and R/S-GM (1,1) models is 84.38% and 87.46%,respectively,with a prediction accuracy of 86.28% and 92.54%,respectively.The grey prediction accuracy of R/S-GM (1,1) model is significantly higher than that of GM (1,1) model.This method has provided a new method for scientifically predicting the mountainous runoff of Datengxia.…”
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Fiabilité de l’enneigement et disponibilité des ressources en eau pour la production de neige dans les domaines skiables du Département de l’Isère (France), en conditions climatiqu... by Martin Gerbaux, Pierre Spandre, Hugues François, Emmanuelle George, Samuel Morin

“…The water demand for snowmaking is calculated and can be compared with hydrological simulations of water resource availability, under current and future climate conditions. …”
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Experimental Methods to Assess the Effectiveness of Soil Conditioning with Foam in Fully Weathered Granite by Liming Tao, Zhongtian Chen, Jian Cui, Huiwu Wang, Yong Fang

“…This method is widely used in EPB tunnelling owing to its strong applicability in different hydrological and geological conditions. When applying the foam conditioning method under different circumstances, it is necessary to optimize the conditioning parameters. …”
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Analysis of Characteristics, Causes and Countermeasures of the Heavy MetalPollution in the Middle and Upper Reaches of the Diaojiang River Basin by LI Donglin, PENG Bin, LIANG Mei, LU Shangxu, WEI Hailing

“…The combination of water quality and flow monitoring is an important direction for thefuture development of the hydrological monitoring system. Based on the modified Tomlinsonpollution load index evaluation model, this paper arranges 10 sampling sites including TanghanVillage etc. in the middle and upper reaches of the Diaojiang River Basin in the non-flood seasonof 2018 to monitor and survey the quantity and quality of 8 kinds of heavy metal pollutants suchas copper, zinc, arsenic, mercury, cadmium, lead, manganese and antimony synchronously, andanalyzes the causes of pollution and proposes countermeasures by comparing the variation ofpollution characteristics and pollution load indexes before and after the modification of theevaluation model. …”
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Rapid modeling of catastrophic floods: A case study of the Padang flood on July 14, 2023 by Rizky Ramadhan Yanuar, Ari Putro Dennish

“…The modeling process involved DEM conditioning, bias correction of rainfall, defining the model domain using the Topographic Wetness Index (TWI), and applying hydrological and hydrodynamic models. Model verification was conducted using flood location and depth data collected from mass media and social media, showing that the model achieved 77.8% accuracy in mapping inundated areas, with Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) of flood depth at 38.093 and 27.584, before the model was calibrated. …”
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