土壤侵蚀强度分级标准中土壤厚度参考指标适用性的探讨

利用密云水库上游区域实测的土壤容重数据,对现行的土壤侵蚀强度分级标准中的土壤流失厚度参考指标的合理性进行了研究讨论。结果发现:不同土壤和不同土地利用条件下土壤表层容重存在较大的差异;利用现行标准的参考指标判定土壤流失的强度出现较大的误差。建议在区域水土流失调查、评价时应采取区域实际土壤容重数据,以更加科学合理使用该标准,更好地服务于当地水土保持规划管理。

A Discussion on the Applicability of The Reference Index of Soil Erosion Intensity Classification

The paper discussed the applicability of the Reference Index-Annual Soil Loss Thickness, of the Criteria of Soil Erosion Intensity Classification based on measured bulk density, which we took Miyun Reservoir as an example. The results showed that there was an obvious difference of bulk density in different type of soils and land use. Soil loss intensity had a great error based on Reference Index of Soil Erosion Intensity Classification. Therefore, we should adopt the actual bulk density in area soil loss survey and evaluation, so as to use scientifically the Criteria of Soil Erosion Intensity Classification and offer better service to the soil loss management.