布哈河流域冻融侵蚀研究

Freeze-thaw erosion in the Buha River basin

利用多时相多光谱遥感数据,针对研究区环境特点和已有的数据资料,基于遥感和GIS的方法获得流域内年降水量、年均气温、坡度、坡向、土壤类型和植被类型六个评价因子数据。以GIS为平台通过建模及空间分析,获得了布哈河流域冻融侵蚀强度等级类型及空间分布信息。结果表明:研究区土壤侵蚀总面积是11331.18 km^2,中度侵蚀和剧烈侵蚀居多,分别占土壤侵蚀总面积的30.04%和63.17%,强烈侵蚀占土壤侵蚀总面积的6.67%。

By multitemporal and multispectral remote sensing data, environmental characteristics and the existing data, the annual precipitation, vegetation type in Buha River basin are annual temperature, slope gradient, slope aspect, soil type, obtained using remote sensing and GIS. In addition, through modeling and spatial analysis based on GIS, soil freeze-thaw erosion intensity and its spatial distribution in Buha River basin are obtained. The results show that, the total area of soil erosion is 11331.18 km2, the mainly erosion types are moderate erosion and severe erosion, which account for 30. 04% and 63.17% respectively, besides, intensive erosion accounts for 6.67% of the total area of soil erosion.