土壤可蚀性因子制图及其不确定性研究进展

Research Advances in Mapping of Soil Erodibility Factor and Its Uncertainty

土壤可蚀性因子是评价土壤对侵蚀敏感程度的重要指标,也是进行土壤侵蚀预报的重要参数。为促进今后相关研究的发展,较为系统地阐述了土壤可蚀性因子、土壤可蚀性因子的空间预测以及土壤可蚀性因子制图中的误差和不确定性的国内外研究现状。分析指出,准确地制作土壤可蚀性因子空间分布图具有重要的现实意义,然而,影响土壤可蚀性因子的因素相当复杂,将土壤类型、高程、遥感等辅助信息融入空间预测,量化、分析空间预测过程中的不确定性,降低制图误差、提高精度、控制风险,成为今后研究的方向。

Soil erodibility is an important indicator of assessing impact of erosion on soil,and also an important parameter for predicting soil erosion. In order to promote relevant research of soil erodibility factor in the future,we present state of the art in China and abroad in terms of its spatial prediction and error and uncertainty of mapping.Analysis shows that accurately acquiring spatial distribution of soil erodibility factor is of practical significance,but it is a difficult task due to complex factors which affect soil erodibility factor. In the future,we should lay emphasis on reducing mapping error,improving accuracy and controlling risk,and quantitatively analyzing the uncertainty of spatial prediction,in association with auxiliary information such as soil types,elevation,and remote sensing images.