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塔里木河源流山区径流模拟及不确定性研究
Authors
陈曦
马勇刚
黄粤
Publication date
20 October 2010
Publisher
Abstract
自然环境恶劣、站点稀少、观测困难是干旱区水文系统研究面临的基本问题。特殊的自然地理条件给水文过程带来了极大的复杂性和不确定性,也阻碍了干旱区水文过程和机理研究的发展。选取塔里木河源区开都河流域为研究区,采用分布式水文模型MIKESHE模拟大尺度资料稀缺地区水文过程,将流域内气象、水文站点数据与遥感数据相结合,利用气象、土壤类型、土地利用和地表覆盖、数字高程(DEM)和降雨等资料,模拟流域水文过程;在出山口径流数据的基础上对模型进行率定和验证;分析了模型中的不确定性的来源,探讨模型优化方法。结果表明,MIKESHE模型能在水文、气象站点稀少,土壤及水文地质数据缺乏的条件下,模拟开都河流域的日径流过程,但精度仍有待提高;通过分析识别出了隐含于模型结构、输入及参数等3个方面的8种不确定性来源
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Last time updated on 29/11/2016