论文部分内容阅读
在分析上海市水土流失特点与成因的基础上,筛选拟定了水土流失重点防治区划分的指标,应用美国通用土壤流失方程(USLE),计算了上海市的水土流失强度,同时利用放射性核素示踪技术,通过对典型地块土壤样品中137Cs存量的测量与分析,对各采样地块的水土流失强度进行了分析与评价,并根据水土流失重点防治区划分指标,对上海市水土流失重点预防区和重点治理区进行了划分。
Based on the analysis of the characteristics and causes of soil and water loss in Shanghai, the indexes of the key soil and water loss prevention and control areas were selected and formulated. By using the US Universal Soil Loss Equation (USLE), the intensity of soil and water loss in Shanghai was calculated, and the radionuclide The soil erosion intensity of each sampling plots was analyzed and evaluated through the measurement and analysis of the 137Cs stock in the typical soil samples. According to the classified indexes of the key prevention and control areas of soil and water loss, the key prevention and control measures of soil and water loss District and key control areas were divided.