黄河流域30米分辨率土壤可蚀性因子数据集

该数据集为黄河流域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。黄河流域土壤可蚀性因子（K）栅格数据的利用黄河流域边界在中国土壤可蚀性因子栅格数据中裁切出黄河流域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 Yellow River Basin. The data was initially calculated using the results of the Second National Soil Survey of China conducted from 1979 to 1994, then revised with observed data from runoff plots. The revised results were interpolated via inverse distance weighting (IDW) to produce the national grid dataset of soil erodibility factor. For special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rocks, their K factor values are forcibly set to 0. If users utilize higher-precision land use data, it is recommended to forcibly set the K factor value to 0 for the following land types once more: rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rocks. For land patches with a K value of 0 but not falling into the above-mentioned types, the K factor can be determined in accordance with the following principles: take the K value of adjacent land patches with the same land type, or calculate the average K value of all adjacent land patches with non-zero K values. The grid dataset of soil erodibility factor (K) for the Yellow River Basin was obtained by clipping the national grid dataset of soil erodibility factor using the boundary of the Yellow River Basin.