大尺度半分布式WASMOD模型汇流方法改进与应用
Improvement and Application of Routing Method for Large Scale Semi-Distributed WASMOD
DOI: 10.12677/JWRR.2019.81006, PDF,   
作者: 李晶晶, 陈 华, 许崇育, 赵浩源：武汉大学水资源与水电工程科学国家重点实验室，湖北 武汉；李 璐：挪威联合研究中心和Bjerknes气候研究中心，挪威 卑尔根
关键词: WASMOD模型；日尺度；DEM；汇流算法；WASMOD； Daily Scale； DEM； Routing Algorithm
摘要: WASMOD水量平衡模型，能满足流域尺度、区域尺度甚至全球尺度的水文模拟，已在全球气候变化影响研究中得到广泛的应用，但其日模型汇流算法没有考虑不同流域地形对流速影响程度的差异。本文以长江流域的湘江、汉江和雅砻江流域为研究对象，建立半分布式日尺度WASMOD模型，通过考虑流域下垫面的影响，研究和改进模型的汇流算法，并比较分析模型汇流方法改进前后的径流模拟效果。结果表明：原模型汇流算法不能适应多种地形情况下的汇流计算，在部分流域计算得到汇流时间相较实际经验值偏长；改进后的模型能合理计算流域汇流时间，从而提高径流模拟精度；汇流算法的改进提高了模型的适用性，改进后的模型能够适应多种地形情况下的径流模拟。
Abstract: WASMOD, a water balance model, which can meet hydrological simulations at the basin scale, regional scale and even global scale, has been widely used in hydrological response to climate change. But its routing algorithm of daily-scale model does not consider the effect of topography on flow velocity which is variable in different watersheds. This paper establishes a semi-distributed daily-scale WASMOD model in Xiangjiang, Hanjiang and Yalongjiang basins in the Yangtze River basin, improves the model’s routing algorithm by considering the basin underlayer, and compares the model efficiency before and after the improvement. The results show that the original model routing algorithm cannot adapt to the routing calculation under various topography conditions. The delay time calculated in some basins is longer than the empirical value. The modified model can calculate the basin delay time reasonably and improve the model efficiency. The modified model can be adapted to runoff simulation under various topography conditions.
文章引用：李晶晶, 陈华, 许崇育, 赵浩源, 李璐. 大尺度半分布式WASMOD模型汇流方法改进与应用[J]. 水资源研究, 2019, 8(1): 56-66. https://doi.org/10.12677/JWRR.2019.81006

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