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水文统计模式在黄土高原小流域产流计算中的分布式应用

ISSN号：0455-2059
期刊名称：《兰州大学学报：自然科学版》
时间：0
分类：X143[环境科学与工程—环境科学] TV121.1[水利工程—水文学及水资源]
作者机构：[1]兰州大学西部环境与气候变化研究院,兰州730000, [2]兰州大学资源环境学院,兰州730000, [3]甘肃省水利水电勘测设计研究院,兰州730000, [4]甘肃省城乡规划设计研究院,兰州730000
相关基金：兰州大学中央高校基本科研业务费专项基金项目（Lzujbky.2009-85）;国家自然科学基金委创新群体项目（40721061）

作者：李常斌[1], 杨文瑾[1], 李文艳[2], 王雄师[3], 杨致远[4]

关键词：土地利用类型, 次降水过程, 水文统计模式, 安家沟流域, land use type, independent rainfall process, hydro-statistical module, Anjiagou watershed

中文摘要：

以半干旱陇西黄土高原典型小流域为研究区，选择并集成水文统计模式对不同利用类型土地进行分布式次降雨一产流模拟．经检验，模型的总体误差为12．6％，模拟精度较好．根据模拟结果，不同地类对次降雨过程水量分配的影响迥异，阴坡入渗量整体大于阳坡的，而林地和草地地表产流量小于其他地类的．表明良好的地表覆被条件使降雨蓄渗增加，有利于土壤水分状况的改善．

英文摘要：

A typical small watershed in the semi-arid Longxi loess plateau was selected as the study site and a set of hydrological statistical modules were adopted and integrated to simulate the independent process of rainfall-overland flow generation with the influences of different land uses in the area. The statistical hydrological modules were applied and validated with an overall error of 12.6%, indicating a relative satisfactory accuracy for the watershed hydrological simulation. From the results of the simulation, it was concluded that land uses has a significant impact on water redistribution during the rainfall-overland flow generation. There had been a greater infiltration in the shading slope area compared to that in the open area, and the overland flow in forest land and grassland were obviously less than that in other areas, which revealed that the better land cover condition is helpful to the soil moisture maintenance due to much more infiltration in such area during the rainfall runoff process.