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冰川冻土  2012 

陆面-水文耦合模型系统在淮河流域的构建及应用

, PP. 139-146

Keywords: LSX-HMS模型,参数敏感性分析,淮河流域,耦合模型

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Abstract:

以淮河流域为研究对象,选择分布式水文模型HMS,结合GIS技术,通过构建数字流域,提取流域特征信息,最终构建了分布式陆面-水文耦合模型(LSX-HMS).采用扰动分析法进行参数敏感性分析,利用实测水文资料进行参数率定和模型验证,确定性系数达0.760~0.939,表明该耦合模型在淮河流域具有较好的适用性.应用LSX-HMS对淮河蚌埠以上集水区域1980-1987年8a平均降水、蒸散发、日径流量和相对土壤含水量的空间分布进行了模拟.结果表明各水文要素的空间分布存在较大的差异性,降水要素的分布呈随纬度递减的趋势;蒸散发和径流量两个变量都是上游小,中下游大;相对土壤含水量在研究区西部及西南部的山区和丘陵区较低,平原区较高.研究成果为淮河流域水土资源合理开发利用、调配和管理提供依据.

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