土木工程學系施上粟李鴻源胡通哲2008-03-072018-07-092008-03-072018-07-092004-09http://ntur.lib.ntu.edu.tw//handle/246246/64167Following the concept of ecotechnology, NETSTARS, a quasi-two dimensional hydraulic model was used to estimate the flood capacity of Liu Regional Drainage in Taichung County. The calculated results, including water surface elevation (w.s.e.) and water velocity, were used as a basis for the ecotechnology. The design consisted of placing a number of concrete blocks, timbers and rocks on the riverbed and riverbank. The model was used to evaluate the present situation and also the proposed design. The cross-sectional w.s.e was obtained and we and evaluated if whether the river banks would be flooded by a rise in the water. The results showed that flooding occurs in all cross-sections during the 2, 5 and 10 year return period discharge. Moreover, hydraulic-jumps occurred in a number of river stretches. The effects of this applied ecotechnology were investigated and compared with the original method. It was found that the fish habitat increased significantly, when the ecotechnology aimed at decreasing water velocity was used. The ecotechnology was re-flected by an increased Manning’s n. The potential fish habitat, in which the flow velocity is lower than 1.2 m/s, increased by around 13.4%. We conclude that applied ecotechnology can improve fish habitat potential.2651460 bytesapplication/pdfen-USecotechnology, hydraulic numerical model, fish habitat.journal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/64167/1/台中柳川應用生態工法於魚類棲地改善之研究.pdf