甘肃省30米分辨率土壤可蚀性因子数据集

该数据集为甘肃省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。甘肃省土壤可蚀性因子（K）栅格数据的利用甘肃省边界在中国土壤可蚀性因子栅格数据中裁切出甘肃省土壤可蚀性因子数据。

This dataset is a 30-meter resolution raster dataset of the soil erodibility factor (K) for Gansu Province. The data was first calculated using the results of the Second National Soil Survey of China conducted between 1979 and 1994, then revised with observation data from runoff plots. The revised results were interpolated via the Inverse Distance Weighting (IDW) method to generate the China-wide raster dataset of soil erodibility factors. 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 employs high-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 grid cells with a K value of 0 that do not fall into the aforementioned land types, the K factor can be determined following these principles: either take the K value of adjacent grid cells of the same land type, or calculate the average of the K values of all adjacent grid cells with non-zero K values. The Gansu Province soil erodibility factor (K) raster dataset was derived by clipping the China-wide soil erodibility factor raster dataset using the administrative boundary of Gansu Province.

搜集汇总

背景与挑战

背景概述

甘肃省30米分辨率土壤可蚀性因子数据集提供了甘肃省土壤侵蚀的关键指标，数据基于全国土壤普查和实地观测数据，经过科学计算和修正，适用于水土保持和土壤侵蚀研究。