Influence of Spur Dikes of Wire Sausages on Stream flow Diversity

• Main Authors: Shi-Liang Zhao, 趙時樑
• Other Authors: Hei-Pang Lien
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/4732wj

碩士 === 逢甲大學 === 土木及水利工程所 === 90 === This study makes use of straight and meandering channel model test to find out the characteristics of flow change after setting up some spur dikes of wire sausages (lateral stones colonies) in river. Including flow index, riverbed stable index and index of water re-aeration ability were use to judge the rule of diverse change of flow in different test conditions. Conclusions are made as follows： 1. The straight channel in condition of abrupt slope and after setting up spur dikes with 2 to 4 times relative spacing, the riverbed and flow pattern produced by whole physical habitat environment is more diverse and less complicated than others. 2. The meandering channel in condition of 2°slope and with 2 to 4 times spacing of bank width will produce more divers flow change. And the diverse habitat environment could be produced by a channel with curvature of 60°and 90°. The main purpose of this study is to probe flow change after setting up some spur dikes in the river in hydraulic point of view. So the fruits of this research can provide to associate fields for design reference. In recent years, near natural engineering method is popular. I hope this study will be a guidance of thinking and effort for whom working on Eco-hydraulics.