基于GIS和USLE模型的安徽舒城县土壤侵蚀空间分析

Analysis on Soil Erosion in Shucheng County Based on GIS Techniques and USLE Model

基于通用土壤侵蚀模型(USLE),利用安徽舒城县逐月降雨数据、土地利用图、土壤类型图、DEM,通过确定土壤侵蚀方程中各因子,在GIS平台上对研究区2010年土壤侵蚀量和空间分布特征进行了研究。结果表明:舒城县的年平均土壤侵蚀模数为303.89t·km-2·a-1,侵蚀强度为轻度。区域土壤侵蚀在轻度以下的面积占研究区面积的97.98%。区域内土壤侵蚀的空间分布差异较大,不同侵蚀等级零散分布;东北部平原地带土壤侵蚀不明显,中南部低丘陵山区及西南部大别山区土壤侵蚀较严重,尤其是龙河口水库区域土壤侵蚀状况严重。通过以上研究分析,以期为当地经济发展及土地利用规划提供参考。

Based on the Universal Soil Loss Equation （USLE）, the soil erosion and spatial distribution characteristics in Shucheng Anhui in 2010 were analyzed by applying the GIS platform and combining with the monthly rainfall data of Shucheng county, land utilization chart, soil type chart and DEM. The results showed that the annual average soil erosion modulus in this area was 303.89 t· km^-2 2 a^-1 ; and the area with mild erosion intensity accounted for 97.98% of the total research area. The spatial distribution of soil erosion showed a great heterogeneity and erosion grade also re vealed a scattered distribution in the basin. The soil erosion condition of the Northeast Plain of the county was not obvious, while in the Central South Low Hills Areas and the Southwest Da Bie Shan Area was more serious, especially in the Long Kou Reservoir Area with the worst damage According to the above research analysis, the findings of this research could provide some implications for the economic development and land planning of the county.