【摘要】 使用一维溃坝模型对唐家山堰塞湖溃决过程进行模拟,研究了推移质公式和边岸侵蚀模型对模拟结果的影响。溃决洪水流量过程线、溃口展宽过程和床面冲刷过程的对比表明,Meyer-Peter&Muller公式在描述漫顶溃坝初始阶段时存在计算冲刷偏小的现象,其可能原因是输沙率与Shields数的高阶(1.5次)非线性关系。本文的比较结果,有助于提高溃坝条件下推移质公式和边岸模型适用性的认识。更多还原

【Abstract】 The breaching process of Tangjiashan barrier dam was simulated to examine the applicability of simulation models. Two bed-load transport formulae and bank-erosion models were examined. The dam-break flow hydrograph, breach widening process, and bed erosion process were computed. It was found that the Meyer-Peter & Muller formula underestimates the erosion rate at the beginning of dam breaching. This is ascribed to the nonlinear relationship between the bed load transport rate and the Shields number. This examination contributes to improve our understanding of the capabilities of various bed-load transport formulations and bank erosion models in dam-break modeling. Examination against more field or experimental data will be desired.更多还原