水力发电学报2017，Vol.36Issue(5)：78-87,10.DOI:10.11660/slfdxb.20170509
基于二维水动力模型与经验公式的桥梁壅水计算及其对比分析
Comparative analysis on bridge backwater depths estimated using 2-D hydrodynamic model and empirical formulas
摘要
Abstract
Backwater depths upstream of six bridges on the Nandu River in Hainan were estimated using MIKE21 and two empirical formulas in this paper,focusing on comparison of the calculations for floods of different frequencies.The results showed that the MIKE21 model was capable of simulating relatively complicated terrain with a higher accuracy:relative errors below 5％ and coefficient RNS above 0.8 in calculations of model calibration and validation.And relative to the simulations,the estimates of D'Aubuisson formula and Henderson formula were smaller with the latter closer to MIKE21 for bridge piers of blockage factor less than 10％,while Luhao's formula produces much larger backwater depths.Thus,when a bridge is located in a river channel with complicated terrain or the channel is crucial to flood control,a hydrodynamic model should be adopted to estimate the upstream backwater depth of a bridge for better accuracy in assessment of its effects on flooding.关键词
MIKE 21/桥梁/壅水/防洪评价Key words
MIKE21/bridge/backwater/flood control assessment分类
建筑与水利引用本文复制引用
任梅芳,徐宗学,苏广新..基于二维水动力模型与经验公式的桥梁壅水计算及其对比分析[J].水力发电学报,2017,36(5):78-87,10.基金项目
国家自然科学基金(51579007) （51579007）
