利用河川棲地二維模式評估丁壩對河川棲地之影響

Evaluation of River Habitat Associated with Spur Dikes Using Two-dimensional Habitat Simulation

莊明德(Ming-De Chuang) ； 周文杰(Wen-Chieh Chou) ； 廖正光(Guang-Jeng Liaw) ； 李德旺(Teh-Wang Lee) ； 張君瑋(Chun-Wei Chang)

《水保技術》 3卷2期 (2008/03) Pp. 49-59

https://doi.org/10.30040/JSWCT.200803.0001

摘要

本研究利用河川棲地二維模式探討不同丁壩設計對河川棲地之影響，以不同設計流量，模擬研究河段於無丁壩、單一丁壩及雙丁壩情況下河川棲地權重可用面積(WUA)。在杉林溪案例探討中，以佈設二座丁壩之方式可獲得最大之WUA；於常流量下，將第二丁壩增長1m可獲得最大之WUA；於10年重現期距流量下，將第二丁壩增長2m可獲得最大之WUA；於25及50年重現期距流量下，將第二丁壩增長3m可獲得最大之WUA。

關鍵字

河川棲地二維模式 ； 丁壩 ； 權重可用面積

並列摘要

The river habitat effects caused by different spur dike implementations were predicted using two-dimensional habitat simulation in this study. Several peak discharges were simulated in channel without spur dike and with one or two spur dikes to predict the weighted usable area (WUA). In the San-Lin Stream case study, the maximum WUA is obtained for two spur dikes scenario. For regular stream discharge simulation, extended one meter for the second spur dike may receive the maximum WUA. For 10-year return period flood simulation, extended two meters for the second spur dike may receive the maximum WUA. For 25-year and 50-year return period flood simulation, extended three meters for the second spur dike may receive the maximum WUA.

並列關鍵字

Two-dimensional river habitat model ； Spur dike ； Weighted usable area