四川省30米分辨率土壤可蚀性因子数据集

该数据集为四川省30米分辨率土壤可蚀性因子（K）栅格数据，数据是利用中国1979-1994年的全国第二次土壤普查的成果数据进行计算；再利用径流小区观测数据修正计算结果；将修订结果利用反距离权重插值法插值生成中国土壤可蚀性因子栅格数据。特殊地类河湖库塘、冰川及永久积雪、裸岩土地类型K因子值强制赋值为0。如果用户采用的土地利用精度较高，建议重新对以下土地类型的K因子强制赋值为0：河湖库塘、冰川及永久积雪、裸岩。如果有K值为0，但不属于上述类型的，K因子可按如下原则：取邻近相同土地类型图斑的K值，或取与该图斑邻近且不等于0的所有图斑K值的平均值。四川省土壤可蚀性因子（K）栅格数据的利用四川省边界在中国土壤可蚀性因子栅格数据中裁切出四川省土壤可蚀性因子数据。

This dataset is a 30-meter resolution raster dataset of soil erodibility factor (K) for Sichuan Province. It was calculated using the results of China’s Second National Soil Survey conducted from 1979 to 1994, and the preliminary calculation outcomes were revised with observational data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate the national raster dataset of soil erodibility factor for China. For special land types including rivers, lakes, reservoirs and ponds, glaciers and permanent snow, and bare rocks, the K factor values were mandatorily set to 0. If users employ land use data with higher spatial resolution, it is recommended to mandatorily reset the K factor values of the following land types to 0: rivers, lakes, reservoirs and ponds, glaciers and permanent snow, and bare rocks. For instances where the K factor value is 0 but the corresponding land type does not belong to the aforementioned categories, the K factor can be determined following these principles: either take the K value of adjacent land patches with the same land type, or calculate the average of the K values of all adjacent land patches with non-zero K values. The raster dataset of soil erodibility factor (K) for Sichuan Province was obtained by clipping the national raster dataset of China’s soil erodibility factor using the boundary of Sichuan Province.