Numerical simulation of deposition of sediment dredged in torrent：A case study of Lai-She river

• Main Authors: Chiue Di-Wang, 闕帝旺
• Other Authors: Lien Hui-Pain
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/15107190403350545547

碩士 === 逢甲大學 === 水利工程與資源保育學系 === 101 === This study uses CCHE2D numerical simulation, and to explore sediment siltation in rivers. After a model parameter calibration and verification conducted after three situational simulation program, and to explore its sediment siltation problems between the three programs. The results can be summarized as following. 1. Lai-yi tribes encountered heavy rain. There are wealth of sediment in the upstream, and constantly being taken sediment to downstream. Obviously lead to river sediment siltation. For the tribe still potentially dangerous impact on sediment disaster simulation results show. 2. Three programs explore the efficiency of sand from prison. Dredging program is the best option, because after the dredging of the river, forming a large sand area prisoners, a large number of sediment deposition in the river. However, removing the bottleneck section program efficiency is the worst prisoners sand, although most sediment has been ruled out, the river did not cause a lot of silt, but a lot of sediment were taken downstream. 3. Program simulation results show that no dredging of the river threatening the lives and property of residents on both sides. River dredging can reduce the threat of residents on both sides, they can be taken to reduce the amount of sediment downstream. Remove the bottleneck section program caused a lot sediment decreased, but may also cause disaster for the downstream, and program implementation is difficult. Need for dredging of the river, and is the most effective solution.