湖南省30米分辨率土壤可蚀性因子数据集

该数据集为湖南省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。湖南省土壤可蚀性因子（K）栅格数据的利用湖南省边界在中国土壤可蚀性因子栅格数据中裁切出湖南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 Hunan Province. The calculation was first performed using the results of the Second National Soil Survey of China conducted from 1979 to 1994, followed by revision of the calculated results with observation data from runoff plots. The revised results were interpolated via the Inverse Distance Weighting (IDW) method to generate the national grid data 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 value was forcibly assigned as 0. If users utilize 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 cases where the K value is 0 but the corresponding land type does not fall into the aforementioned categories, the K factor can be determined following these principles: take the K value of adjacent land parcels with the same land type, or calculate the average K value of all adjacent non-zero K value land parcels. The grid dataset of soil erodibility factor (K) for Hunan Province was obtained by clipping the national soil erodibility factor grid data of China using the boundary of Hunan Province.

搜集汇总

背景与挑战

背景概述

该数据集提供了湖南省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生成，适用于土壤侵蚀和水土流失研究。数据经过严格的质量控制，并包含特殊地类的处理方法和用户使用建议。