本文選題：洪水演進(jìn) + 雙層異步迭代��； 參考：《武漢大學(xué)學(xué)報(bào)(信息科學(xué)版)》2016年12期

【摘要】：均一化迭代是基于柵格數(shù)據(jù)的洪水演進(jìn)模擬常采用的迭代策略,存在設(shè)定迭代步長(zhǎng)與柵格單元實(shí)際所需時(shí)間不一致的問(wèn)題,直接影響到柵格單元水位、流量的計(jì)算精度。針對(duì)該問(wèn)題,提出了一種雙層異步迭代策略。外層迭代控制洪水演進(jìn)時(shí)刻,內(nèi)層迭代則通過(guò)分析不同柵格單元洪水的流速特征,實(shí)現(xiàn)迭代步長(zhǎng)及迭代次數(shù)的自適應(yīng)設(shè)定。采用商用FloodArea軟件、均一化迭代算法及雙層異步迭代算法,分別對(duì)福建省萬(wàn)安流域暴雨洪水歷史數(shù)據(jù)進(jìn)行模擬。該算法模擬結(jié)果的平均誤差比FloodArea小0.361m,比均一化迭代算法小0.654m,說(shuō)明該算法能有效提高洪水演進(jìn)模擬的整體精度。
[Abstract]:Homogenization iteration is an iterative strategy commonly used in flood routing simulation based on grid data. There is a problem that the iteration step size is not consistent with the actual time required by the grid unit, which directly affects the calculation accuracy of the water level and discharge of the grid cell. To solve this problem, a double-level asynchronous iterative strategy is proposed. The outer iteration controls the flood routing time, and the inner iteration adaptively sets the iteration step and iteration times by analyzing the flood velocity characteristics of different grid units. Using commercial FloodArea software, uniform iterative algorithm and two-layer asynchronous iterative algorithm, the historical data of torrential rain and flood in Wanan basin of Fujian Province are simulated respectively. The average error of the simulation results is 0.361m less than that of FloodArea and 0.654m smaller than that of homogeneous iterative algorithm, which shows that the algorithm can effectively improve the overall accuracy of flood routing simulation.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(武漢)信息工程學(xué)院;內(nèi)蒙古自治區(qū)航空遙感測(cè)繪院;
【基金】：國(guó)家自然科學(xué)基金(41501584)~~
【分類號(hào)】：P333.2
，

本文編號(hào)：1842149