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題 名 | 霧社水庫內沖積扇的土石粒徑調查分析研究=Grain Size Analysis of the Sediments of Alluvial Fan Inside the Wushieh Reservoir |
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作 者 | 楊德建; 林俊賢; 宋國士; | 書刊名 | 台電工程月刊 |
卷 期 | 660 2003.08[民92.08] |
頁 次 | 頁74-84 |
分類號 | 351.8 |
關鍵詞 | 霧社水庫; 沖積扇; 水庫淤積; 粒徑調查; Wushieh reservoir; Alluvial fan; Reservoir sediment; Grain size analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 霧社水庫底部的淤積沖積扇,因每年降雨而帶進的土石,以平均100~300公尺/ 年的速率向萬大電廠進水口推進。此研究計畫便分析此沖積扇(N2654500以北)與電廠前沈 滓區(N2654500以南),土石組成與粒徑空間分佈,以瞭解沖積扇土石潛在的破壞力。初步 成果指出粒徑空間分佈特性(由北至南);沖積扇頂水道發。顆粒變化複雜;沖積扇頂西側 台地多屬細粉砂質懸浮沈積,沈積環境緩慢且穩定;沖積扇坡多為細粉砂與極細粉砂,東側 較西側為細,西部淘選度差,且有中砂質出露;沈滓區內皆為較細粉砂,是為浮型淤泥沈積 物,進水口的底流將沈滓區西側的表層未固結淤泥帶離,東側壩址處的顆粒粒徑較西側為 細。由以上資料可提供萬大電廠,認識沈滓區與沖積扇顆粒組成大小,作為電廠機電及土木 設施安檢參考之一。 |
英文摘要 | The alluvial fan's in the bottom of Wushieh Reservoir, averaging yearly propagating rate has been at 200~300 metrer/year to the intake of the Wanda power plant in the consequence of heavy precipitation in its watershed area. This project was to study grain size spatial distribution and to understand the possibility of potential hazard caused by sediment processes in the alluvial fan region (in north of N2654500) and particle siltation region (in south of N2654500), respectively. The result denoted different characteristics of grain size spatial distribution (from north to south), as follows: upon the alluvial fan, sediments displayed variant sizes in different places; on the west plateau of alluvial fan which showed silted sediments in suspended mode and deposit environment was calm and steady; down the slope of alluvial fan, sediments belonged mostly from fine silts to very fine silts, which was finer and well sorted on east side of the channel bottom. In the siltation region on the south, the overlying sediments had been deposited in precipitation mode resulting in the median size very fine silt, and they were flushing caused by the bottom flow directing to the intake, especially for those under-consolidated surface silted sediments located on the west provides useful information to the Wanda hydro power plant, as providing the results of grain size distribution and spatial analysis, and as also a preference of safety control to power plant electrical and civil facility. |
本系統中英文摘要資訊取自各篇刊載內容。