Numerical Simulation of the Effect of Consolidation Work on River Habitat

• Main Authors: Jung-Kang Po, 薄榮鋼
• Other Authors: Chuan-Yi Wang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/88b7t9

碩士 === 逢甲大學 === 土木及水利工程所 === 91 === River regulation structures have been placed to prevent the lengthwise and transverse erosion, and to stabilize the river bed and the soil delivery in the past. However, limited attention was placed on the river habitats. The prevention works need to be revised to create an environment suitable for the organism, and to minimize the depredation on the environment. The objective of this study was to conduct simulations using SMS Model (Surface Water Modeling System) developed by the BOSS Company to search for the optimum arrangements of the consolidation works with consideration of both safety and ecological conditions. It was found that relative accurate flow phenomena can be simulated using RMA2 (Resource Management Associates) model. The results of the simulations indicated that the saw-tooth consolidation work was a better tool for energy dissipation and flow regulation than the conventional consolidation work. In general, highest flow diversity was observed for a saw-tooth consolidation work with an interval 4 times of the channel width, and which also coincides with those of physical experiment. Similar results were obtained when the saw interval of the consolidation work was half of the saw width. The above consolidation work arrangements can provide multiplicity of stream habitat, and form a better river habitat environment for aquatic creatures.