
科学技术与工程

中国技术经济学会
基于月时间尺度的安徽省土壤侵蚀研究
Soil Erosion in Anhui Province Based on Monthly Time Scale
基于RUSLE模型,定量分析安徽省各月土壤侵蚀空间分布特征,了解安徽省土壤侵蚀危险时段,探讨土壤侵蚀与植被、降雨及土地利用类型之间的关系。结果表明:安徽省3月份土壤侵蚀较为剧烈,平均侵蚀模数为123.31 t/(km2·month),侵蚀总量为1.63 × 107 t /month;7月份土壤侵蚀较弱,平均侵蚀模数为24.32 t /(km2·month),侵蚀总量为3.21 × 106 t/month。安徽省各月土壤侵蚀强度均以微度侵蚀为主,各时期微度侵蚀面积占侵蚀总面积的75%以上。安徽省中度及以上土壤侵蚀主要集中在皖南丘陵山区、皖西大别山地区。皖南、皖西地区侵蚀总量占据各月侵蚀总量的84%以上。3月份皖西、皖南平均侵蚀模数分别达到了251.50、408.89 t/(km2·month)。今后应加强对皖西大别山、皖南丘陵山区的治理,应适当增加山地区域的植物物种多样性,降低土壤流失。
Based on RUSLE model, the spatial distribution characteristics of soil erosion in Each month in Anhui province were quantitatively analyzed to understand the risk period of soil erosion in Anhui Province, and to discuss the relationship between soil erosion and vegetation, rainfall and land use types. The results show as follows. The soil erosion in Anhui Province was severe in March, with an average erosion modulus of 123.31 t/(km2·month) and a total erosion of 1.63 × 107 t/month. Soil erosion was weak in July, with an average erosion modulus of 24.32 t/(km2·month) and a total erosion of 3.21 × 106 t/month. The intensity of soil erosion in Each month in Anhui province is mainly micro-erosion, and the area of micro-erosion in each period accounts for more than 75% of the total erosion area. Moderate and above soil erosion mainly occurred in the hills and mountains of southern Anhui and dabie Mountains of western Anhui. The total amount of erosion in southern and western Anhui accounted for more than 84% of the total amount of erosion in each month. In March, the mean erosion modulus in western and southern Anhui reaches 251.50 t /(km2·month) and 408.89 t/(km2·month), respectively. In the future, it is necessary to strengthen the governance of dabie mountain in western Anhui and the hilly and mountainous areas in southern Anhui, appropriately increase the plant species diversity in mountain areas and reduce soil loss.
RUSLE model / monthly soil erosion / Anhui Province / land use
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