河北省30米分辨率土壤可蚀性因子数据集

该数据集为河北省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。河北省土壤可蚀性因子（K）栅格数据的利用河北省边界在中国土壤可蚀性因子栅格数据中裁切出河北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 Hebei Province. The calculation was initially conducted using the data from China’s Second National Soil Survey carried out between 1979 and 1994. The calculated results were then revised with observed data from runoff plots. The revised results were interpolated via the Inverse Distance Weighting (IDW) method to generate the national raster dataset of soil erodibility factor (K) for China. For special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock, the K factor values were forcibly set to 0. If the user adopts higher-precision land use data, it is recommended to forcibly set the K factor value to 0 for the following land types again: rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock. For pixels with a K value of 0 but not belonging to the above-mentioned land types, the K factor can be determined according to the following principles: take the K value of adjacent patches of the same land type, or calculate the average K value of all adjacent patches with non-zero K values. The raster dataset of soil erodibility factor (K) for Hebei Province was finally obtained by clipping the national raster dataset of China’s soil erodibility factor using the boundary of Hebei Province.

搜集汇总

背景与挑战

背景概述

该数据集提供了河北省30米分辨率的土壤可蚀性因子（K）栅格数据，基于全国土壤普查和径流小区观测数据计算并修正，适用于水土流失和环境科学研究。数据包含特殊地类的处理建议，确保数据质量可靠。