青藏高原坡度因子L与坡长因子S数据

本数据是青藏高原30m分辨率的坡度因子（S）和坡长因子（L）栅格数据。基于青藏高原12.5m地形数据，采用土壤侵蚀模型地形因子计算工具软件（简称：LS计算工具软件），分幅计算S因子和L因子，通过重采样和镶嵌处理生成30m分辨率的L因子与S因子分布图，采用WGS_1984坐标系和Albers投影（中央经线105°E，标准纬线25°N和47°N），地形因子是影响水力侵蚀的重要因子，也是CSLE、RUSLE等模型计算的基础因子。12.5m分辨率地形数据的精度高，提高地形因子LS估算的准确性，也有助于进一步精确估算青藏高原土壤侵蚀量。

This dataset provides 30-meter resolution grid data of the slope steepness factor (S) and slope length factor (L) over the Qinghai-Tibet Plateau. Based on the 12.5-meter topographic data of the Qinghai-Tibet Plateau, the S and L factors were calculated tile by tile using the topographic factor calculation tool software for soil erosion models (hereinafter referred to as the LS calculation tool). Subsequently, distribution maps of the L and S factors with 30-meter resolution were generated via resampling and mosaic processing. The dataset adopts the WGS_1984 coordinate system and Albers projection with a central meridian of 105°E and standard parallels of 25°N and 47°N. These topographic factors are critical influencers of water erosion, and serve as fundamental input parameters for calculations in models such as the Chinese Soil Loss Equation (CSLE) and the Revised Universal Soil Loss Equation (RUSLE). The high-precision 12.5-meter topographic data enhances the accuracy of LS factor estimation, and also facilitates more accurate quantification of soil erosion on the Qinghai-Tibet Plateau.

搜集汇总

背景与挑战

背景概述

该数据集是青藏高原30m分辨率的坡度因子（S）和坡长因子（L）栅格数据，基于12.5m高精度地形数据计算生成，采用WGS_1984坐标系和Albers投影，覆盖2019年。数据主要用于土壤侵蚀模型（如CSLE、RUSLE）的地形因子计算，支持青藏高原土壤侵蚀量的精确估算，具有高空间分辨率和专业应用价值。