江西省30米分辨率土壤可蚀性因子数据集

该数据集为江西省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。江西省土壤可蚀性因子（K）栅格数据的利用江西省边界在中国土壤可蚀性因子栅格数据中裁切出江西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 Jiangxi Province. The data was calculated using the results of the Second National Soil Survey of China conducted from 1979 to 1994, then the calculated results were revised with observed data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate a national raster dataset of soil erodibility factor for China. For special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock, the K factor values are forcibly assigned as 0. If users adopt higher-precision land use data, it is recommended to re-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 cells with a K value of 0 that do not belong to the above-mentioned land types, the K factor can be determined according to the following principles: take the K value of adjacent patches with the same land type, or calculate the average of the K values of all adjacent non-zero patches. The Jiangxi Province soil erodibility factor (K) raster dataset was obtained by clipping the aforementioned national soil erodibility factor raster dataset using the administrative boundary of Jiangxi Province.

搜集汇总

背景与挑战

背景概述

该数据集是江西省30米分辨率的土壤可蚀性因子（K）栅格数据，基于1979-1994年全国第二次土壤普查数据计算，并利用径流小区观测数据修正后通过反距离权重插值生成。数据专门针对江西省区域，用于土壤侵蚀和水土保持研究，特殊地类如河湖库塘等被赋值为0，用户可根据高精度土地利用数据进一步调整。