山西省30米分辨率土壤可蚀性因子数据集

该数据集为山西省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。山西省土壤可蚀性因子（K）栅格数据的利用山西省边界在中国土壤可蚀性因子栅格数据中裁切出山西省土壤可蚀性因子数据。

This dataset is a 30-meter resolution grid dataset of soil erodibility factor (K) for Shanxi Province. The initial calculation was conducted using the results of the Second National Soil Survey of China carried out from 1979 to 1994. Subsequently, the calculation results were revised with observation data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate the national-scale grid dataset of China's soil erodibility factor. Specifically, the K factor values of special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock are forcibly assigned as 0. If users adopt higher-precision land use data, it is recommended to forcibly set the K factor value of 0 for the following land types again: rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock. For pixels with a K factor value of 0 but not belonging to the aforementioned land 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 factors. The Shanxi Province soil erodibility factor (K) grid dataset was obtained by clipping the national grid dataset of China's soil erodibility factor using the boundary of Shanxi Province.

搜集汇总

背景与挑战

背景概述

该数据集提供了山西省30米分辨率的土壤可蚀性因子（K）栅格数据，基于全国土壤普查数据和径流小区观测修正，采用反距离权重插值法生成，适用于水土流失研究和环境科学领域。