土壤坡面侵蚀模型在水土流失监测中的应用研究

土壤坡面侵蚀模型是当前水土流失监测预报的重要工具，明确其应用存在的问题有助于指导生产实践并提升水土流失监测与水土保持评价的科学性。采用同一数据源，对比研究三因子模型、USLE模型及CSLE模型的坡面侵蚀监测结果，揭示了3种模型侵蚀强度分级的差异性。三因子模型与USLE模型的侵蚀等级划分结果相近，而CSLE模型划分的侵蚀等级偏高。CSLE模型划分的中度及以下等级侵蚀分布在3.0°以下坡耕地，5.0°以上坡耕地以强烈及以上侵蚀等级为主且极强烈和剧烈侵蚀面积占总侵蚀面积的80%以上，3.0°～5.0°的坡耕地各侵蚀强度等级所占比例相当，5.0°可以确定为东北地区坡耕地侵蚀强度由轻变重的临界坡度。

Application of Soil Slope Erosion Model to Soil and Water Loss Monitoring

Soil slope erosion model is an important tool for current soil and water loss monitoring and forecasting. Clarification of problems in its application can help guide production practices and improve the scientificity of soil and water loss monitoring and soil and water conservation assessment. Using the same data source, the results of slope erosion monitoring of the three-factor model, the USLE model, and the CSLE model were compared and compared, and the differences in erosion intensity classification among the three models were revealed. The erosion factor classification results of the three-factor model are similar to those of the USLE model, while the erosion classification of the current CSLE model is relatively high. Compared with the other two models, CSLE has the smallest area of mild erosion, the largest area of severe erosion, and moderate intensity The following erosion is distributed on slope farmland below 3 °, the slope farmland above 5 ° is dominated by strong erosion, and the area of extremely strong and severe erosion accounts for more than 80% of the erosion area. The erosion intensity grade of slope farmland from 3 ° to 5 ° The proportions are similar, and 5 ° can be determined as the critical slope of the slope-arable land erosion intensity from light to heavy in Northeast China.