河南省30米分辨率土壤可蚀性因子数据集

该数据集为河南省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。河南省土壤可蚀性因子（K）栅格数据的利用河南省边界在中国土壤可蚀性因子栅格数据中裁切出河南省土壤可蚀性因子数据。

This dataset is a 30-meter resolution gridded dataset of soil erodibility factor (K) for Henan Province. The calculation was initially conducted using the results of the Second National Soil Survey of China spanning 1979 to 1994, followed by revision of the calculated outcomes with observational data from runoff plots. The revised results were interpolated via the inverse distance weighting (IDW) method to generate the national-scale gridded soil erodibility factor dataset for China. For special land types including rivers, lakes, reservoirs, ponds, glaciers and permanent snow, and bare rock, the K factor values were forcibly assigned to 0. If users adopt land use data with higher accuracy, it is recommended to re-forcibly assign a K factor value of 0 to the aforementioned land types. For any grid cells with a K factor value of 0 but not falling into the aforementioned land types, the K factor can be determined in accordance with the following principles: take the K value of adjacent land parcels with the same land use type, or calculate the average K value of all adjacent land parcels with non-zero K values. The gridded soil erodibility factor (K) data for Henan Province was finally extracted from the national Chinese soil erodibility factor gridded dataset using the administrative boundary of Henan Province.

搜集汇总

背景与挑战

背景概述

该数据集是河南省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成果和径流小区观测数据计算修正后生成，适用于土壤侵蚀和水土流失研究。数据通过反距离权重插值法处理，并针对河湖库塘等特殊地类强制赋值为0，提供高精度的空间分析基础。