广东省30米分辨率土壤可蚀性因子数据集

该数据集为广东省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。广东省土壤可蚀性因子（K）栅格数据的利用广东省边界在中国土壤可蚀性因子栅格数据中裁切出广东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 Guangdong Province. The initial calculation was conducted using the outcomes of the Second National Soil Survey of China, which was carried out from 1979 to 1994. Subsequently, the resulting calculation values were revised based on observational data collected from runoff plots. The revised results were interpolated using the inverse distance weighting (IDW) method to produce the national-scale raster dataset of soil erodibility factor for China. Specifically, the K factor values for specific land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow/ice, and bare rocks are mandatorily set to 0. If users employ higher-precision land use data, it is recommended to mandatorily set the K factor values of the following land types to 0: rivers, lakes, reservoirs, ponds, glaciers and permanent snow/ice, and bare rocks. For raster cells with a K factor value of 0 that do not belong to the aforementioned land types, the K value can be determined according to the following principles: either use the K value of adjacent raster cells with the same land type, or calculate the average K value of all adjacent raster cells with non-zero K values. The Guangdong Province soil erodibility factor (K) raster dataset was finally derived by clipping the national-scale soil erodibility factor raster dataset of China using the boundary vector of Guangdong Province.