HEC-RAS模式在野溪水理演算之應用與探討

Application and Verification of HEC-RAS Model in a Stream

林永峻(Yong-Jun Lin) ； 丁振章(Zhen-Zhang Ding) ； 鄒宗儒(Tsou-Tsung Ju) ； 李鴻源(Hong-Yuan Lee) ； 賴進松(Jihn-Sung Lai) ； 黃杰立(Chieh-Li Huang)

《中華水土保持學報》 40卷3期 (2009/09) Pp. 34-48

https://doi.org/10.29417/JCSWC.200909_40(3).0003

摘要

近年來各項工程水理相關設計除安全考量外，亦應儘量符合自然生態工法之需求。採用較合理且簡便的水理演算模式，可有效地進行河道斷面及工程佈置之設計規劃。美國工兵團之HEC-RAS模式，考慮實際河道斷面幾何特性及糙度，且可考量水工結構物（如橋墩、橋台、涵洞等）造成之束縮突擴效應，具備較完善之水理計算能力。本研究採用HEC-RAS模式，針對台北縣雙溪鄉丁子蘭坑溪之第一至三期整治河段進行水理計算；同時進行水工模型試驗，試驗成果與水理演算模式模擬結果相互比較分析，並獲得良好之比較成果；由成果可說明HEC-RAS模式可作爲野溪水理計算之良好工具。

關鍵字

HEC-RAS模式 ； 水工結構物

並列摘要

Except safety consideration, hydraulic design should satisfy the demands in the ecological point of the view. Taking a robust and user-friendly hydraulic computational model can speed up effectively the hydraulic engineering design and layout. The HEC-RAS model was developed by the Hydrologic Engineering Center of the U.S. Army Corps of Engineers. This software allows the user to perform one-dimensional hydraulic computation based on various geometric characteristics, roughness of river sections and contraction/expansion effects of hydraulic structures in a river. The Tin-Chi-Lan-Kan Creek located in the Taipei County is selected as a study site. An experimental study is also conducted by constructing the physical model for this site. The measured water levels are compared with the calculated results by HEC-RAS model. The applications of HEC-RAS model in the Tin-Chi-Lan-Kan Creek demonstrate the effective potential in the upper land streams.

並列關鍵字

HEC-RAS model ； hydraulic structure ； physical model