Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method

碩士 === 國立交通大學 === 土木工程學系 === 99 === The reservoirs in Taiwan have many problems related to sedimentation, so the sediment flushing during flood season to maintain the reservoir capacity is an important topic of water resources. Among the flushing strategies, venting density current is the most suita...

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Main Authors: Kang, Sheen-Yeong, 康新詠
Other Authors: Yeh, Keh-Chia
Format: Others
Language:zh-TW
Published: 2010
Online Access:http://ndltd.ncl.edu.tw/handle/15734266434987824292
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spelling ndltd-TW-099NCTU50150032016-04-18T04:21:31Z http://ndltd.ncl.edu.tw/handle/15734266434987824292 Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method 一維顯式有限解析法應用於石門水庫水力排砂之研究 Kang, Sheen-Yeong 康新詠 碩士 國立交通大學 土木工程學系 99 The reservoirs in Taiwan have many problems related to sedimentation, so the sediment flushing during flood season to maintain the reservoir capacity is an important topic of water resources. Among the flushing strategies, venting density current is the most suitable one for Shihmen Reservoir. This study extends the previous research of Hsu (2008), which considered one-dimensional explicit finite analytic numerical model with cohesive sediment in reservoir, and applied the numerical model to the Shihmen Reservoir. According to previous studies, the larger capacity of the low-level outlet is, the better reservoir sediment flushing efficiency will be. The mass of flushing sediment of each outlet could be obtained by integrating the sediment concentration along water depth at the dam determined by the method of van Rijn (1984) and the outflow of each outlet determined by water stage-outflow rating curve. Therefore, the sediment flushing efficiency could be calculated by dividing the mass of flushing sediment to the mass of the upstream inflow sediment. By simulating the process of sediment flushing during Sinlaku typhoon in 2008 and Morakot typhoon in 2009, the flushing efficiencies of simulation results were compared by the observation data. And by simulating Aere typhoon in 2004, the flushing efficiencies of venting density current with different low-level outlet outflow capacities before and after the modification of the flushing facilities were also evaluated. Yeh, Keh-Chia 葉克家 2010 學位論文 ; thesis 78 zh-TW
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language zh-TW
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sources NDLTD
description 碩士 === 國立交通大學 === 土木工程學系 === 99 === The reservoirs in Taiwan have many problems related to sedimentation, so the sediment flushing during flood season to maintain the reservoir capacity is an important topic of water resources. Among the flushing strategies, venting density current is the most suitable one for Shihmen Reservoir. This study extends the previous research of Hsu (2008), which considered one-dimensional explicit finite analytic numerical model with cohesive sediment in reservoir, and applied the numerical model to the Shihmen Reservoir. According to previous studies, the larger capacity of the low-level outlet is, the better reservoir sediment flushing efficiency will be. The mass of flushing sediment of each outlet could be obtained by integrating the sediment concentration along water depth at the dam determined by the method of van Rijn (1984) and the outflow of each outlet determined by water stage-outflow rating curve. Therefore, the sediment flushing efficiency could be calculated by dividing the mass of flushing sediment to the mass of the upstream inflow sediment. By simulating the process of sediment flushing during Sinlaku typhoon in 2008 and Morakot typhoon in 2009, the flushing efficiencies of simulation results were compared by the observation data. And by simulating Aere typhoon in 2004, the flushing efficiencies of venting density current with different low-level outlet outflow capacities before and after the modification of the flushing facilities were also evaluated.
author2 Yeh, Keh-Chia
author_facet Yeh, Keh-Chia
Kang, Sheen-Yeong
康新詠
author Kang, Sheen-Yeong
康新詠
spellingShingle Kang, Sheen-Yeong
康新詠
Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
author_sort Kang, Sheen-Yeong
title Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
title_short Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
title_full Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
title_fullStr Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
title_full_unstemmed Study on Shihmen Reservoir Sediment Flushing Using 1D Explicit Finite Analytic Method
title_sort study on shihmen reservoir sediment flushing using 1d explicit finite analytic method
publishDate 2010
url http://ndltd.ncl.edu.tw/handle/15734266434987824292
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