论文部分内容阅读
利用1990年和2010年两期Landsat TM数据,基于RS和GIS技术及通用土壤侵蚀方程(RUSLE),完成黑龙江省宾县两个时期的土壤侵蚀动态变化分析,以期揭示该区域土壤侵蚀空间分布格局与时空动态演变规律。结果表明:两个时期土壤侵蚀总体格局基本一致,都是以微度和轻度侵蚀为主,面积比例分别为80.68%和74.71%;微度和极强度侵蚀的变化率呈缩小趋势,轻度、中度和重度侵蚀呈增加趋势,土壤侵蚀有加剧的趋势;轻度和强度侵蚀的主要流向为中度侵蚀,中度和极强度侵蚀的主要流向为强度侵蚀。
Based on Landsat TM data of 1990 and 2010, based on RS and GIS technology and RUSLE, the dynamic analysis of soil erosion in Binxian County of Heilongjiang Province was completed in order to reveal the spatial pattern of soil erosion in this area And the dynamic evolution of space-time. The results showed that the overall pattern of soil erosion in the two periods was basically the same, both of which were mainly micro-degree and mild-degree erosion with the proportions of 80.68% and 74.71%, respectively. The rates of micro-erosion and extreme-intensity erosion showed a decreasing trend, The trend of soil erosion is aggravating. The main flow of mild and intense erosion is moderate erosion. The main flow of moderate and extreme erosion is intensity erosion.