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Introduction to the special issue of the 13th International Symposium on river Sedimentation,Stuttgart,Germany:Experimental and measuring/monitoring research related to sediment issues

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International Journal of Sediment research 2018年第1期33卷 1-2页

作者： Markus Noack Heide friedrich Jochen Aberle institute for Modelling Hydraulic and Environmental Systems University of Stuttgart Department of Civil and Environmental Engineering University of Auckland leichtweiβ-institut für wasserbau Technische Universitt Braunschweig

The papers in this issue stem from the 13th International Symposium on river Sedimentation held in September 2016 at the University of Stuttgart,*** Symposiums on river Sedimentation aim to provide a platform for scientists and engineers for fruitful and in-depth knowledge *** objectives are to develop sustainable revitalization and management strategies that address the ongoing negative effects of anthropogenic activities,whilst improving river systems toward a healthy ecological *** fundamental research and understanding of interactive

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Groundwater Management in the Esna City,Upper Egypt:An Application of remote Sensing and Numerical Modeling

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Natural resources 2014年第12期5卷 732-745页

作者： Manal Abdel Monem Abdalla faid Esam Ismail Matthias Schoniger research institute for Groundwater CairoEgypt National Authority for remote Sensing and Space Sciences(NArSS) CairoEgypt Department of Geology Faculty of ScienceMinia UniversityEl-MiniaEgypt Hydrologie Wasserwirtschaft und GewaesserschutzLeichtweiβ-Institut für WasserbauTechnische UniversitätBraunschweigGermany

The major issues concerning water development and management include water conservation and the efficiency of water use, cost recovery, social and environmental factors. So continuous monitoring is essential to evaluate the reclamation impacts on the groundwater potentiality such as Esna Area. The main objective of this work is to determine the new development areas in Esna during the period from 1984 to 2011 using remote sensing technique. The impacts of the present and future development have been evaluated by using the two-dimensional numerical groundwater flow Simulation Package (visual modflow 4.2). The package is used to construct and calibrate a numerical model that can be used to simulate the response of the aquifer in the study area under implementing different management alternatives in the form of changes in piezometric levels and salinity. from land use maps of the study area in the year 2011, a lot of changes in development areas especially out the border of the old land were observed. The change in land reclaimed area was estimated with 44% in the period from year 1984 to 2011. This development accompanied with draw down about 2.5 meters through this period of time. The authors recommend applying different kinds of change detection technique on the study area. Comparing between results, continuous monitoring of the development area is highly recommended.

关键词： remote Sensing Management of Aquifer Systems Simulation Modeling Upper Egypt

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GrAVEL SLUICING IN ALPINE rUN-Of-rIVEr HYDrOPOWEr PLANTS

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International Journal of Sediment research 2001年第2期16卷 251-257页

作者： Helmut SCHEUErLEIN1 1 institut flier wasserbau, Univeristy of Innsbruck, Technikerstn 13. A-6020 Innsbruck, Austria. institut fuer wasserbau Univeristy of Innsbruck Technikerstn 13. A-6020Innsbruck Austria.

Deposition of coarse sediment at the entrance of a reservoir is for many reasons an undesired side- effect. Besides loss of storage volume which concerns also fine sediment carried in suspension, the coarser material transported as bedload - particularly the gravel fraction ?is to cause additional effects upstream as well as downstream of the reservoir. Upstream the depositions at the entrance of the reservoir may result in a backup effect at flood events with increasing risk of inundations, and downstream of the reservoir the deficiency of coarse material inevitably results in degradation of the river bed. In the frame of a real hydropower plant (Bad Tolz in Southern Bavaria) the possibility of sluicing coarse material through the reservoir towards downstream has been studied and finally realized. The sluicing process has been coupled with water level drawdown at flood events of appropriate characteristics. The sluicing action was controlled by monitoring and evaluating environmentally significant parameters (sediment concentration, etc.). The results were promising and valuable hints for further actions of this kind could be extracted.

关键词： reservoir sedimentation Bed degradation downstream of dams Sediment management at hydropower plants Gravel sluicing

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