陕西省30米分辨率土壤可蚀性因子数据集

该数据集为陕西省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。陕西省土壤可蚀性因子（K）栅格数据的利用陕西省边界在中国土壤可蚀性因子栅格数据中裁切出陕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 Shaanxi Province. The data was calculated using the outcomes of the Second National Soil Survey of China conducted from 1979 to 1994, and the initial 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 China-wide grid dataset of soil erodibility factor. For special land categories including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock, the K factor values were forcibly set to 0. If users utilize higher-precision land use data, it is recommended to forcibly reset the K factor values of the following land types to 0: rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock. For regions with a K value of 0 but not falling into the above-mentioned land categories, the K factor can be determined according to the following rules: take the K value of adjacent map patches with the same land type, or compute the average of the K values of all adjacent map patches with non-zero K values. The Shaanxi Province soil erodibility factor (K) grid dataset was obtained by clipping the China-wide soil erodibility factor grid dataset using the administrative boundary of Shaanxi Province.

搜集汇总

背景与挑战

背景概述

该数据集是陕西省30米分辨率的土壤可蚀性因子（K）栅格数据，基于全国第二次土壤普查数据计算，并经径流小区观测修正和反距离权重插值生成。数据对河湖库塘、冰川及永久积雪、裸岩等特殊地类强制赋值为0，适用于土壤侵蚀评估和土地利用规划。