Analysis for Hydrological Regime of the Lower Reaches of Geheyan Reservoir Based on IHA-RVA Method by TU Yulyu, LI Yinghai, GUO Jiali, NIE Panpan

“…In order to evaluate quantitatively the change of ecological and hydrological regime of the lower reaches of Geheyan reservoir,based on the daily flow data of Changyang hydrological station from 1951 to 2010,this paper analyzes the flow trend with the non-parameter Mann-Kendall trend test,and the abrupt change points by Mann-Kendall test,moving t test and ordered clustering,and then comprehensively evaluates the ecological and hydrological changes of Changyang section at the lower reaches of the Geheyan reservoir with IHA-RVA (indicators of hydrologic alteration and range of variability approach) and hydrological alteration degree evaluation.The results show that:The annual average runoff of Changyang station shows unobvious downward trend.In 2000,there was an abrupt change.In overall,the hydrological regime is featured with 58% of moderate change,and indicators with the most obvious change are the base flow index,time of annual minimum flow,duration of low flow pulse and number of reversals,which can provide reference for water ecological protection of Qingjiang River Basin.…”
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Medium-long-term Forecast of the Runoff of the Xinfengjiang Reservoir in Dry Season Based on the Random Forest and RBF Artificial Neural Network by ZHENG Yanhui, ZHANG Lilan, TIAN Zhaowei, CHEN Xiaohong

“…The results can be used as an important reference for the forecast of runoff in theDongjiang River basin in dry season.…”
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Experimental Study on Stability Analysis of a Structure during Excavation beneath This Structure by Yichen Miao, Baoxian Liu, Changwu Liu, Zhile Shu, Haikuan Wu

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Comparison of BP and LSTM Neural Network for Hydrologic Forecasting of a Small Watershed in Fujian by CUI Wei, GU Ranhao, CHEN Benyue, WANG Wen

“…According to the hourly rainfall and runoff data of the Duli Hydrological Station in Yanshouxi River Basin of Fujian, this paper establishes the BP neural network and LSTM neural network by the modular modeling method, avoids the local optimization in the model training by the method of ensemble prediction mean, and conducts the rolling forecasting of hourly runoff within 1 to 24 hour by the two neural network models. …”
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Saisir les liens entre trame bleue, paysages de l’eau et projets urbains by Anne Rivière-Honegger, Sylvie Servain, Gilles Armani, Dominique Andrieu, Hervé Parmentier

“…The implementation in France of a renewed approach reintegrating urban development within its environment, the Green and Blue Network (Grenelle law n° 2010-788, 12 July 2010), provides an opportunity to study the links between rivers and cities. The work presented here is the fruit of an analysis conducted in the metropolitan river areas of Lyon, Strasbourg and Nantes, on the role played by the Blue Network and landscape biodiversity in urban projects and, more specifically, in reconversion operations. …”
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Research on Flood Forecasting Based on Double-excess Model by HU Xinwei, ZHANG Yu, ZHU Xueping, ZHAO Xuehua

“…In order to conduct the flood forecasting research of small watershed in the control basin of Lengkou hydrological station,this paper firstly process the digital elevation model (DEM) of the study area;calculates the area weight of the sub-basin by Thiessen polygon method,the runoff yield by the double-excess flow model,the overland flow through the Nash instantaneous unit line method and the flood in river course by SWAI₁,and establishes the double-excess flood forecasting model;analyzes the sensitivity of model parameters with LH-OAT method;and calibrates and verifies the model parameters for 25 historical floods with different flood levels.The simulation results reach grade B forecast precision in the period of calibration and verification,so the simulation effect is good.The research results can provide reliable reference for hydrological forecast,flood control and disaster reduction,and enrich the research experience of flood forecasting in semi-arid and semi-humid areas.…”
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Response Analysis of Dam Heel and Gallery Arch before and after Backfilling and Water Filling of High Dam by FU Yuchen, HU Yu, TAN Raosheng, ZHOU Mengxia, LIU Chunfeng, PEI Lei

“…As the key to the construction of high dams,backfilling in front of the dam and filling of the foundation pit have an important impact on the stress state of key parts of the dam body,such as the dam heel and gallery arch.Therefore,this paper studies the response of dam heel and gallery arch before and after backfill and foundation pit filling of a high dam in Southwest China based on the monitoring data and simulation analysis.The results show that under the combined effect of weight,temperature and hydrostatic pressure,due to the influence of the backfill in front of the dam and the water filling height of the foundation pit,the tensile stress produces at the dam heel,and the compressive stress increases along the river at the gallery arch,with the maximum increment of 1.24 MPa.Thus,the tensile stress of the gallery arch is weakened and the stress state of the high dam is optimized,which can be further verified through the comparison with monitoring data.…”
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Evolution Process and Impact Analysis of the Dam-break Flood of Baihuatan Hydropower Station Based on HEC-RAS by JIANG Linjie, FU Chenghua, CHENG Xinyu, LIU Jian

“…Once the reservoir is destroyed,it will bring huge damage to peoples lives and regional economic development.This paper extracts the topographic information of the upstream and downstream of Baihuatan Hydropower Station by Google Earth and Arc-GIS,establishes a numerical analysis model of the river channel through HEC-RAS based on the 1∶1 000 topographic map of the hub,calculates and analyzes the evolution process and the scope of impact of dam-break flood under nine schemes,and clearly defines the submerged scope and transfer route.The results show that:The flow of the breach depends on the width of the breach.During the course of the dam-break flood,with the continuation of the flood into the reservoir,the peak flow of the downstream sections decreases slightly;The greater the flood into the reservoir is,the earlier the peak flow of downstream sections occurs;Guoyushe,Shihua Village,Caiyuanzi,and Anning Village will be flooded to a certain extent.The analysis results provide a scientific basis for the safe operation of power stations and emergency management of flood control,and a reference for the research of similar gate dam projects.…”
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L’embouchure de l'Amazone, macro-frontière géomorphologique : enseignements de 30 années de recherches franco-brésiliennes sur les systèmes côtiers amazoniens by M. T. R. C. Prost, J-F. Faure, C. Charron, H.V. Vargas, V. F. Santos, A.C. Mendes, A. Gardel

“…The Mouth of the Amazon River, considered to be the largest river on Earth, is a geomorphological macro-frontier between two coastal blocks : the Guiana Shield coastal fringe (from Amapa to Venezuela) and the Para/Maranhao block (North Brazil). …”
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Application of New Structure on Power House with Large Variable Tailwater in Karst Area by GUAN Zhibao, ZHANG Pingjun, YANG Wen, FENG Chuqiao

“…The power house behind Jiayan dam in Guizhou Province is located in Karst area.Affectedby the backwater effect of underground river, the tailwater head of power plant reaches 44.92 m,and the retaining height is equivalent to a gravity dam in medium height, which brings greatdifficulties to the layout and structural design of power house. …”
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Les espaces ruraux du Brahmapoutre et les villes d’Assam : des chemins divergents ? by Émilie Cremin, Annick Hollé

“…In northeast India, economic growth disproportionally benefits certain populations living within the Brahmaputra flood plain. The river itself is at once a longitudinal link across the State of Assam, and a medium-scale break separating villages and cities. …”
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Le castrum de l’Antiquité tardive et du haut Moyen Âge de Mandeure et l’établissement fortifié de hauteur de Château-Julien (Doubs) by David Billoin, Cédric Cramatte

“…At the same time, not far below, a hilltop fortified settlement at Château-Julien is established on a strategic control point at the crossing of land and river roads. The presence of these two concomitant power centres raises the question of a territorial restructuring centred on this part of the river Doubs valley.…”
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Proximate and Phytochemical Analysis of Leaves of Anthocleista vogelii ( Cabbage palm) by Emem Ikpeme Bassey, Effiong Bassey Bassey, Ugbor Ofunna, Pheobe Ikechukwu

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Research on Improvement in Application Effect of Artificial Fish Nests by LAN Yuqian, ZHANG Jiajun, HE Jingliang, WU Huiying, MA Haitao, WAN Zhengping

“…As a measure to restore fish habitats,artificial fish nests have been widely used in the protection of aquatic ecosystems.The current studies and inventions of artificial fish nests pay much attention to the changes in material and structural forms,and few focus on their resistance to water flow impact and the convenience of later maintenance.Many problems are exposed in the application of artificial fish nests,such as limited applicable environments,difficulties in adapting to river environments with large changes in flow velocity and water levels,and low process practicability and durability.On the basis of summarizing the application problems of artificial fish nests and their causes,this article explores the applicability characteristics of different artificial fish nests and innovates artificial fish nests sticking to the riverbank through the improvements in structural forms,fixation modes,material selection,and operation to improve the application effects of artificial fish nests in flowing water environment.…”
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Layout of Release Works and Design of Revetment of Lagdo Hydropower Station by WANG Yi-zhui

“…Next comes the 550m long tailrace directing the flow into the main river bed. The spillway is 42m in width in average with bucket to dissipate energy. …”
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Les Wayana de Guyane française sur les traces de leur histoire by Marie Fleury, Tasikale Alupki, Aimawale Opoya, Waiso Aloïké

“…Indeed, the migration took place in a context of war (ethnic and colonial), and attacks of aquatic monsters attacks symbolize the dangers of the river. It is a real conquest of the Litani that is delivered here through various accounts and cards and maps allowing us to spatialize the history of the Wayana on this river.…”
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Adverse Environmental Impact: A Consultant’s Perspective by Alan W. Wells, Thomas L. Englert

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Analysis of the Influence of Whipstock Point Position of Directional Drilling through Embankment on the Stability of Embankment Slope against Sliding by Jinhuang Yu, Jinjie Liu, Zhenzhen Jiang, Xiaofang Kang

“…With the increasing number of river-crossing pipeline projects, many studies have focused on the safety and stability of embankment slopes in horizontal directional drilling crossing embankment construction. …”
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Digital Twin BIM Management System of Storage Tanks Based on BIM and UE4 by ZENG Qingda, HU Ting, WANG Huang, WANG Yuanyuan, QIN Jing

“…In order to improve the digitalization and smart water operation and maintenance management of storage tanks,and to achieve the digital and intelligent control,scheduling and management of storage tanks,taking the largest storage tank at the end of Longgang River in Shenzhen as the research object,based on the BIM model with full-professional collaborative forward design,this paper develops the digital twin BIM management system by the BIM software based on the Autodesk platform and the advanced game engine Unreal engine in current industry,with high-fidelity rendering capabilities,close-to-real visualization effects,BIM+GIS available and real-time reading,and interactive communication of various sensor information in the storage tank through secondary development for improving the the real-time interaction and intelligent control of equipment,and based on this,develops functional modules such as rainfall prediction,pedestrian and vehicle traffic,equipment management,and operation management to successfully extend the BIM technology to the operation and maintenance management stage of the storage tank,and give full play to the greater role of BIM,which provide reference for future smart operation and maintenance projects.…”
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