四川省矿产资源规划开采区水土流失分析

Analysis on the State of Soil Erosion in Mineral-Resource Planed Areas in Sichuan Province

以水土流失通用方程为理论基础,运用数学模型和敏感性分析相结合的方法,选取降水敏感性、地形敏感性、土壤敏感性、植被敏感性作为因子建立了评价指标体系,将降水、地形、土壤和植被敏感性专题图与矿产资源规划开采区进行空间耦合,对矿产资源开采区进行水土流失分析与预测。结果显示:在30个开采区中,对开采区水土流失产生严重影响的有10个,中度影响16个,轻度影响4个,大部分中度和严重影响区位于中度以上水土流失区域,将这一评价结果与四川省水土流失敏感性指数图进行验证,两者具有高度的一致性。这说明在矿产资源开发过程中易诱发和加剧矿区水土流失。

Based on Universal Soil Loss Equation and mathematics model and sensitivity analysis, this paper chose the spatial sensitivity of precipitation, physiognomy, soil, and vegetation as factors to establish the evaluating indicator system, then analyzed and forecasted the impact degree of soil erosion in 5 years. The results showed all of mineral resources exploit activities can be triggered soil erosion in 30-mineral-resource planed areas in Sichuan. The specific data as follows： 10 of those present serious, 16 moderate, 4 slight. Finally, contrasted with index of spatial sensitivity of soil erosion in Sichuan province, the results of assessment is reasonable.