土木工程學系Hong-Yuan LeeShang-Shu ShihJheng-Chang Chen2008-03-102018-07-092008-03-102018-07-092004-05http://ntur.lib.ntu.edu.tw//handle/246246/64183A quasi-two-dimensional numerical model (NETSTARS) and a horizontal two-dimensional model (TABS-2) were used to simulate the hydraulic characteristics, such as water depth, flow velocity and sediment transport capability of Lan-Yan Estuary with and without spur dikes construction. These informations were used to calculate the weighted usable area (WUA) of Cyprinidate and Homalopteridae. Both fixed bed and mobile bed conditions were investigated. In the fixed bed case, the maximum WUA of Cyprinidate occurs when the dimensionless spur dike length D/L is between 3 to 3.4. The WUA of Homalopteridae increases as D/L increases. Taking the effects of sediment transport into account, i.e. the mobile case, the comparing with the results of fixed bed simulation, WUA of Cyprinidate and Homalopteridae decrease 8.42% and 7.17%, respectively. Sediment deposition will decrease fish habitat and is very important in long-term habitat management255361 bytesapplication/pdfen-USSpur dikes, weighted usable area (WUA), fish habitat, numerical model, dimensional analysisjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/64183/1/Impacts of spur dikes on the Homalopteridae fish habitat.pdf