重庆市30米分辨率土壤可蚀性因子数据集

该数据集为重庆市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。重庆市土壤可蚀性因子（K）栅格数据的利用重庆市边界在中国土壤可蚀性因子栅格数据中裁切出重庆市土壤可蚀性因子数据。

This dataset is a 30-meter resolution grid dataset of soil erodibility factor (K) for Chongqing Municipality. The initial calculation was performed using the results of the Second National Soil Survey of China conducted between 1979 and 1994. Afterwards, the calculated outcomes were revised with observational data from runoff plots. The revised results were then interpolated via the inverse distance weighting (IDW) method to generate the national-scale grid dataset of soil erodibility factor (K) for China. Specifically, the K factor values for land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock are forcibly set to 0. If users utilize higher-precision land use data, it is recommended to forcibly assign a K factor value of 0 to the following land types: rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock. For grid pixels with a K value of 0 that do not fall into the aforementioned categories, the K factor can be determined following these principles: adopt the K value of adjacent pixels with the same land type, or compute the average K value of all adjacent pixels with a non-zero K factor. The Chongqing-specific grid dataset of soil erodibility factor (K) was obtained by clipping the national Chinese grid dataset using the boundary of Chongqing Municipality.