Spatial variability of rainfall erosivity in Brazil

被引：0

作者：

Ferreira Trindade, Ana Luiza ^{[1
]}

Sanches de Oliveira, Paulo Tarso ^{[2
]}

Ayach Anache, Jamil Alexandre ^{[1
]}

Wendland, Edson ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Hidraul & Saneamento, Caixa Postal 359, BR-13560590 Sao Carlos, SP, Brazil

[2] Univ Fed Mato Grosso do Sul, Caixa Postal 549, BR-79070900 Campo Grande, MS, Brazil

来源：

PESQUISA AGROPECUARIA BRASILEIRA | 2016年 / 51卷 / 12期

关键词：

soil and water conservation; EI30; kriging; USLE; SOIL-EROSION; MATO-GROSSO; PRECIPITATION; PATTERNS; COSTS; RUSLE;

D O I：

10.1590/S0100-204X2016001200002

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The objective of this work was to develop a new rainfall erosivity map for Brazil, using rainfall time series longer than 20 years, and to analyze the spatial distribution of erosivity values. Rainfall data from 1,521 rain gauges were applied to 75 regression equations that relate the mean annual precipitation (P) and the rainfall coefficient (R-c) with the rainfall erosivity index (EI30). Rainfall erosivity values for ungauged regions were obtained by interpolation using the ordinary kriging method. The highest indices were observed between November and February. The results are interpolations that show satisfactory performance for estimating the spatial distribution of the mean annual rainfall erosivity and the EI30 during the months of the year. Therefore, those maps can help on soil and water conservation planning, considering the design of those areas and periods of the year that are considered more critical for rainfall erosivity in Brazil.

引用

页码：1918 / 1928

页数：11

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