基于RUSLE模型的晋城盆地土壤侵蚀特征研究

    Soil erosion characteristics in Jincheng Basin based on RUSLE model

    • 摘要: 通过分析晋城盆地内的土壤侵蚀分布状况,探讨不同坡度、土地覆被类型对侵蚀强度的影响,为区域土壤侵蚀防治提供技术支撑.利用空间分析技术,结合修正的通用土壤流失方程(RUSLE)计算土壤侵蚀速率,并划分等级.结果表明:晋城盆地内土壤侵蚀速率最大值为28 912.2 t/(km2·a),平均值为936.41 t/(km2·a),重点侵蚀地区集中于东南部丹河下游;坡度15~35°范围是区域内土壤侵蚀高发区,发生面积占总面积的72.59%、占总侵蚀量的90.28%;不同覆被类型中,土壤侵蚀发生比例最高的为耕地,达82.01%;侵蚀速率最大为坡面草地,达7 186.08 t/(km2·a).因此晋城盆地内不同坡度、覆被类型均对土壤侵蚀强弱有直接影响,应重点进行边坡改造、退耕还林,采取有效的防治措施.

       

      Abstract: This study analyzes the spatial distribution of soil erosion in Jincheng Basin to investigate the influences of slope gradient and land cover types on erosion intensity, aiming to provide technical support for regional soil erosion prevention and control. By utilizing spatial analysis techniques and the Revised Universal Soil Loss Equation (RUSLE), soil erosion rates are calculated and classified. The results indicate that the maximum soil erosion rate in Jincheng Basin reaches 28 912.2 t/(km2·a), with an average rate of 936.41 t/(km2·a). The most severe erosion is concentrated in the downstream area of Danhe River in the southeastern part of the basin. Slopes ranging from 15° to 35° are identified as the high risk zone for soil erosion, accounting for 72.59% of the total area experiencing erosion and contributing to 90.28% of the total soil loss. Among different land cover types, cultivated land exhibits the highest occurrence frequency of soil erosion at 82.01%, while grassland on slopes records the maximum erosion rate of 7 186.08 t/(km2·a). Therefore, slope gradient and land cover type directly influence the intensity of soil erosion in Jincheng Basin, calling for prioritized implementation of slope stabilization, returning farmland to forest, and other effective control measures.

       

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