基于RUSLE模型的剑湖流域土壤侵蚀定量评价

Quantitative Evaluation of Soil Erosion at the Basin of Jian Lake Based on RUSLE

为了解剑湖流域土壤侵蚀状况,以云南省剑川县剑湖流域为研究区,利用RS与GIS相结合的手段,基于修正的美国通用流失方程(RUSLE),对各个因子数据进行采集、分析和计算,估算剑湖流域土壤侵蚀模数。结果表明,研究区年均土壤侵蚀模数为12.56 t/(hm^2·a),侵蚀强度为轻度,其中土壤侵蚀中度及以下占到流域面积的94.5%,而强度侵蚀、极强度侵蚀和剧烈侵蚀分别为1.8%、2.2%和1.5%。

To understand the situation of soil erosion in the Basin of Jian Lake in the Jianchuan County of Yunnan Province, the data of each factor of RUSLE were collected, analyzed and calculated by RS combined with GIS in order to estimate the soil erosion modulus. The results showed that the soil erosion modulus of the Basin of Jian Lake was 12.56 t/（hm2 · a）, so it was in the category of slight erosion. The moderate and under moderate erosion occupied 94.5% of the total watershed areas. The intensive erosion, extreme intensive erosion and severe erosion were 1.8%, 2.2% and 1.5%, respectively.