北京市生态涵养区水土流失特点分析

Analysis on the characteristics of soil and water loss in ecological conservation area of Beijing

为掌握北京市生态涵养区土壤侵蚀及其危害情况,2019年利用高分遥感影像和野外调查数据,采用中国土壤流失方程进行了北京市土壤侵蚀模数计算,评价了全市土壤侵蚀强度。结果表明,生态涵养区水土流失面积2148.61 km^2,占全市水土流失面积的98.92%,生态涵养区轻度侵蚀、中度侵蚀、强烈侵蚀面积分别为2116.90、26.06、5.65 km^2,该区域是北京市水土流失最主要区域,此结果为北京生态涵养区保护和生态文明建设提供参考。

In order to grasp the situation of soil erosion and its hazards center in the ecological conservation area of Beijing,the soil erosion modulus of Beijing was calculated and the soil erosion intensity of the whole city was evaluated by using high-resolution remote sensing images and field survey data in 2019 and adopting the Chinese Soil Loss Equation.The results showed that the area of soil and water loss in the ecological conservation area was 2,148.61 km^2,accounting for 98.92% of the total area of soil and water loss in the whole city.The areas of mild,moderate and severe erosion in the ecological conservation area were 2,116.90,26.06 and 5.65 km2,respectively,which was the main area of soil and water loss in the whole city.