This study conducted a model test for the flow in the Dahanshi river after building the proposed Dashi weir and Wulin weir. The test results were also used for the verification of the simulation results of one-dimensional numerical model. The test results show that Dashi weir should be located at 110m downstream of the Dashi bridge and the weir elevation is EL.=80.5m. Also, the test results and the one-dimensional numerical results are in good agreements.