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利用DEM、MODIS资料和石羊河流域周围29个(甘肃19个、青海10个)气象站1976~2005年30年气象数据,基于ARCGIS和SPSS软件,利用主成分分析(PCA)、基因算法(GA’s)、地形抬升原理和赫伯特方法,利用土壤湿度、辐射和温度地形分布模型(LANDSET)和空气相对湿度地形分布模型(LANDAM),建立了由两个子模型组成的流域土壤水分含量模型(SWC)。本研究将该水文模型在石羊河流域进行了应用,研究表明:利用该模型计算的石羊河流域土壤含水量参数效果较好;石羊河流域的土壤水分含量在0.068~1之间,其空间分布具有从上游祁连山区到下游荒漠区逐渐减少的趋势;该模型适合于干旱区内陆河流域的土壤水分含量模拟研究。
Based on the data of DEM, MODIS and meteorological data of 29 stations (19 stations in Gansu and 10 stations in Qinghai) from 1976 to 2005 in the area around Shiyang River, based on ARCGIS and SPSS software, principal components analysis (PCA) and gene algorithm GA’s), topographic uplift and Herbert method, a model of soil moisture content of two sub-models was established by using the soil moisture, radiation and temperature distribution model (LANDSET) and the air relative humidity distribution model (LANDAM) SWC). In this study, the hydrological model was applied in Shiyang River Basin. The results show that the soil moisture content of Shiyang River Basin calculated by this model is better; the soil water content of Shiyang River Basin is between 0.068 and 1, Its spatial distribution tends to decrease gradually from the upstream Qilian Mountains to the downstream desert areas. The model is suitable for the simulation of soil moisture content in the inland river basins of arid areas.