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土壤侵蚀是在岷江上游面临的最严重的生态和环境问题之一。研究选取降水、土壤质地、坡度、坡长、植被覆盖度、水土保持因子等6个因子,采用修正通用土壤流失方程(RUSLE)探讨岷江上游土壤侵蚀敏感性的空间分布。结果表明,研究区土壤侵蚀中度至极度敏感性面积占研究区总面积42.45%,而轻度和不敏感的区域分别占54.29%和3.26%。由空间分布上来看,较敏感区主要分布在黑水县中部和理县的中部地区,而较不敏感位于东部及东南部地区。
Soil erosion is one of the most serious ecological and environmental problems facing the upper reaches of the Minjiang River. In this study, 6 factors including precipitation, soil texture, slope, slope length, vegetation coverage and water and soil conservation factors were selected to investigate the spatial distribution of soil erosion sensitivity in the upper reaches of Minjiang River by using the modified common soil loss equation (RUSLE). The results showed that the moderate to extremely sensitive area of soil erosion in the study area accounted for 42.45% of the total area under study, while the slight and insensitive areas accounted for 54.29% and 3.26% respectively. From the spatial distribution point of view, the more sensitive areas are mainly distributed in central Heishui County and Li County in the central region, while less sensitive in the eastern and southeastern regions.