Residue dam-Discharge Relationshipat Dam-Break Site

• Main Authors: Ting-Yao Qiu, 邱庭嶢
• Other Authors: 許中杰
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/58290991031520792424

碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 101 === This research applies model tests and numerical simulation to analyze, at dam failure, the relationship between flow rate and the residual dam body. The dam failure test model is located downstream of a linear channel with a bed slope S0 of 0.01, length of 12.00 m and width of 0.775 m. The shape of the breach is rectangular. The dam consists of three tiers, first of which is in the shape of the breach; the second tier is a horizontally symmetric double-door panels wider than the maximum width of the breach. A removable divider that can be pulled up makes the third tier. Removal of the divider separates it from the water body, which reduces the upward shear stress imposed by the divider on the water body. Simulation of a partial dam failure is done by setting the residual dam height to 0.250, 0.175, 0.125, 0.100, and 0.000 m tall and by modifying the residual dam body to make the breach width equal to 1.0, 0.9, 0.8 and 0.7 times of the channel width. This research also utilizes FLUENT simulation software with a three-dimensional model to generate a dam failure simulation under non-steady flow and turbulent flow modes. The simulation criteria are the same as those of the physical model tests, and the simulation results are compared and analyzed with the physical test results.