台中中埔十號橋上游整治工程水理特性分析

Analysis of the Hydraulic Characteristics for the Upstream Regulation Project of No. 10 Bridge in Jhongpu, Taichung

詹勳全(H. C. Chan) ； 吳坤棋(K. C. Wu)

《水保技術》 12卷1期 (2018/05) Pp. 16-25

摘要

本研究透過二維動床水理模式CCHE2D分析中埔十號橋上游整治工程，治理前與治理後及不同工程元件（巨石、固床工與低水護岸）佈置之水理特性差異，模擬分析採用工區集水區內竹林雨量站共15年之雨量資料，推算出模擬上游邊界之水流流量歷線，並配合現地泥砂粒徑、現場實測地形及溪床粗糙度等參數，模擬洪水事件水流流速、水流深度及溪床變化量之分布，並分析比較不同工程元件佈置之水理差異性，探討其造成差異之原因，藉此量化工程構造物在治理前與治理後之效益，作為日後野溪治理工程規劃配置之參考。

關鍵字

野溪治理 ； 模式 ； 工程配置

並列摘要

The hydrodynamic model CCHE2D was used to study the hydraulic characteristics for the upstream regulation project of No. 10 Bridge in Jhongpu, Taichung. The differences between pre-regulation, post-regulation, regulations with different engineering considerations (including reservation of exiting rock, ground sill and low-water revetment) were investigated. The flow hydrograph, estimated from the 15-years rainfall data of the Chu-Lin gauge which is located within the watershed of the regulation project, was used as the upstream boundary condition. The model was built based on the field surveyed sediment distribution, riverbed morphology, and Manning's roughness. The simulation results including the flow velocities, depths and changes of riverbed elevation during the floods. These data were used to investigate differences between the regulation works. Then, the pre-regulation and post-regulation efficiencies were evaluated. It was expected to provide as references for the regulation projects of torrents.

並列關鍵字

The quality of rural regeneration project ； Structure size ； Allowable standard