Rating Curve Assessment at the Yuansantze Flood Diversion Works Using Laboratory and Field Data
The Yuansantze Flood Diversion Works (YFDW) was competed in 2005. The design flood discharge of YFDW is 1620m3/s and flood diversion discharge is 1310m3/s. The main purpose of YFDW is to protect downstream urban areas of the Taipei City from flooding disaster. The design flood stage can be reduced by 1. 5m on average at downstream reach under 200-year return period protection. Hydraulic physical model was constructed to verify and evaluate the engineering design. Various return-period inflow discharges were tested to find out flow mechanism in the YFDW. In physical modeling, the water levels and flow velocities at specific cross sections were measured. Using these water levels data and corresponding discharges, the rating curve of flood diversion discharge was then established. After completion of YFDW, field measurements of water levels have been recorded during typhoon and storm floods. However, the obtained flood diversion discharge adopting the rating curve obtained in the physical model did not consist with the discharge measured in the field. In this study, the assessment for applicability of the rating curves regressed from laboratory and field data is analyzed. The 3D numerical model is suggested to simulate flow field for detailed mechanism of the flow patterns in YFDW. The numerical results may be used to modify the rating curve for more accurate flood diversion discharge.
Jihn-Sung Lai Ming-Hsi Hsu Tsang-Jung Chang Fong-Zuo Lee Der-Liang Young
Research Fellow, Hydrotech Research Institute and Adjunct Dept.of Bioenvironmental Systems Eng.,Nati Dept.of Bioenvironmental Systems Eng., NTU Dept.of Civil Eng., NTU
国际会议
南京
英文
205-211
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）