江苏省30米分辨率土壤可蚀性因子数据集

该数据集为江苏省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。江苏省土壤可蚀性因子（K）栅格数据的利用江苏省边界在中国土壤可蚀性因子栅格数据中裁切出江苏省土壤可蚀性因子数据。

This is a 30-meter resolution soil erodibility factor (K) raster dataset of Jiangsu Province. The dataset was first calculated using the results of the Second National Soil Survey of China conducted from 1979 to 1994, followed by revision of the calculation results with observation data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate the national-scale soil erodibility factor raster dataset of China. Specifically, the K factor values of land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock were forcibly assigned a value of 0. If the user utilizes high-precision land use data, it is recommended to forcibly set the K factor values of the aforementioned land types (rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock) to 0 again. For pixels with a K factor value of 0 but not belonging to the above-mentioned land types, the K factor can be determined following these principles: take the K value of adjacent pixels of the same land type, or calculate the average K value of all adjacent non-zero K factor pixels. The soil erodibility factor (K) raster dataset of Jiangsu Province was finally obtained by clipping the national-scale soil erodibility factor raster dataset of China using the administrative boundary of Jiangsu Province.