宁夏回族自治区30米分辨率土壤可蚀性因子数据集

该数据集为宁夏回族自治区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。宁夏回族自治区土壤可蚀性因子（K）栅格数据的利用宁夏回族自治区边界在中国土壤可蚀性因子栅格数据中裁切出宁夏回族自治区土壤可蚀性因子数据。

This dataset is a 30-meter resolution grid dataset of soil erodibility factor (K) for the Ningxia Hui Autonomous Region. The calculation was conducted using the results of the Second National Soil Survey of China carried out between 1979 and 1994. Subsequently, the calculated results were revised with observational data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate the national-scale grid dataset of soil erodibility factor for China. For special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow/ice, and bare rock, the K factor values were forcibly set to 0. If users employ land use data with higher accuracy, it is recommended to forcibly set the K factor values of the following land types to 0: rivers, lakes, reservoirs, ponds, glaciers and permanent snow/ice, and bare rock. For patches with a K value of 0 that do not fall into the aforementioned types, the K factor can be determined following these principles: take the K value of adjacent patches with the same land type, or calculate the average K value of all adjacent patches with non-zero K values. This dataset for the Ningxia Hui Autonomous Region was extracted by clipping the national-scale grid data of soil erodibility factor for China using the boundary of the Ningxia Hui Autonomous Region.