吉林省30米分辨率土壤可蚀性因子数据集

该数据集为吉林省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。吉林省土壤可蚀性因子（K）栅格数据的利用吉林省边界在中国土壤可蚀性因子栅格数据中裁切出吉林省土壤可蚀性因子数据。

This dataset is a 30-meter resolution grid data of soil erodibility factor (K) for Jilin Province. The data was calculated using the results of the Second National Soil Survey of China conducted between 1979 and 1994, then revised with runoff plot observation data, and finally the revised results were interpolated via the Inverse Distance Weighting (IDW) interpolation method to generate the national grid data of soil erodibility factor for China. For special land types including rivers, lakes, reservoirs and ponds, glaciers and permanent snow cover, and bare rock, the K factor values were forcibly set to 0. If users utilize land use data with higher precision, it is recommended to forcibly set the K factor values of the following land types to 0: rivers, lakes, reservoirs and ponds, glaciers and permanent snow cover, and bare rock. For cases where the K factor 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 patches with the same land type, or calculate the average K value of all adjacent land patches with non-zero K values. The grid data of soil erodibility factor for Jilin Province was derived by clipping the national grid data of soil erodibility factor for China using the boundary of Jilin Province.

搜集汇总

背景与挑战

背景概述

该数据集是吉林省30米分辨率的土壤可蚀性因子栅格数据，基于全国土壤普查数据和径流小区观测数据计算生成，适用于水土保持和土壤侵蚀研究。数据质量可靠，并提供了特殊地类的处理建议。