REDB-BR: Rainfall Erosivity Database for Brazil

This is REDB-BR, the Rainfall Erosivity Database for Brazil from the MSWEP rainfall dataset.

It provides the R factor from the Universal Soil Loss Equation (USLE) in a 0.1º resolution grid, developed with 37 years of rainfall data from the MSWEP dataset.

The R factor was calculated trough 73 erosivity index regression equations, which mostly uses a relation between monthly precipitation and annual precipitation, the Modified Fournier Index (MFI), and represents a good approximation to locals with no sub-hourly data for long periods. 

The main product of REDB-BR is the R factor map, available also as a .tif raster. The database also includes the equations shapefile, Thiessen Polygons shapefile and the equations table.

本数据集为REDB-BR，即基于MSWEP降水数据集构建的巴西降雨侵蚀力数据库。
该数据集提供通用土壤流失方程（Universal Soil Loss Equation，USLE）中的R因子，采用0.1°分辨率格网形式，基于MSWEP数据集37年的降水数据完成构建。
R因子通过73种侵蚀力指数回归方程计算得到，这些方程大多基于月降水量与年降水量的关联关系、修正傅里叶指数（Modified Fournier Index，MFI），对于长期缺乏逐小时降水数据的地区而言，该计算结果是较为理想的近似值。
REDB-BR的核心产品为R因子分布图，同时提供.tif格式的栅格文件。该数据库还涵盖回归方程矢量shapefile、泰森多边形（Thiessen Polygons）矢量shapefile以及回归方程数据表。