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分布式水文模型EasyDHM(Ⅱ):应用实例 被引量:29

Distributed hydrological model EasyDHM Ⅱ. Application
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摘要 本文介绍了分布式水文模型EasyDHM在汉江上游流域的应用实例。通过采用EasyDHM中的EasyDHM产流模型、马斯京干汇流模型、LH-OAT敏感性分析方法和SCE-UA参数优化方法等,对汉江上游流域进行了水文模拟及参数率定。由参数敏感性及参数优化结果可知,各产汇流参数敏感性随空间分布的不同有一定差异,而随着时间系列的延长其变化并不大,这不仅说明了按水文站进行参数分区的必要性,也说明了在长系列水文模拟中,可仅对指定校正期进行参数优化。而参数优化后能较大程度提高水文模型模拟精度,则证实了参数优化的必要性以及本模型所选取参数优化算法的合理性。 The application of the distributed hydrological model EasyDHM to the upper Hanjiang River basin is presented. The runoff generation model of EasyDHM, the Muskingum method, the parameter sensitivity analysis method LH-OAT and the parameter optimization method SCE-UA are used. The results of parameter sensitivity analysis and parameter optimization show that the sensitivity of different parameters in runoff generation and confluence model varies with space, but changes not significanfly with the length of time series. It not only indicates the importance of parameter subregion partition, but also the parameter optimization should only be operated in a short correction period for hydrological simulation in a long period. The high precision result demonstrates the necessity of parameter optimization and the reasonable choice of optimization method in EasyDHM.
出处 《水利学报》 EI CSCD 北大核心 2010年第8期893-899,907,共8页 Journal of Hydraulic Engineering
基金 国家自然科学基金创新研究群体科学基金项目(50721006) "十一五"国家科技支撑计划(2006BAB04A07 2008BAB29B08) 国家重点基础研究发展计划(973计划)(2006CB403404) 水利部公益性行业科研专项经费资助项目(200901031)
关键词 水文模型 EasyDHM SCE-UA LH-OAT 敏感性分析 参数优化 Hydrological model EasyDHM SCE-UA LH-OAT sensitivity analysis parameter optimization
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