Spatial variability of the rainfall erosive potential in the State of Mato Grosso do Sul, Brazil

Engenharia Agrícola

Paulo T. S. Oliveira¹  Dulce B. B. Rodrigues¹  Teodorico A. Sobrinho²  Daniel F. De Carvalho¹  Elói Panachuki¹ 

[1] ,Universidade Federal de Mato Grosso do Sul CCET Campo Grande MS

关键词: water erosion;    rainfall erosivity index;    geostatistics;    erosão hídrica;    índice de erosividade;    geoestatística;   

DOI  :  10.1590/S0100-69162012000100008

来源: SciELO

【 摘 要 】

Information about rainfall erosivity is important during soil and water conservation planning. Thus, the spatial variability of rainfall erosivity of the state Mato Grosso do Sul was analyzed using ordinary kriging interpolation. For this, three pluviograph stations were used to obtain the regression equations between the erosivity index and the rainfall coefficient EI30. The equations obtained were applied to 109 pluviometric stations, resulting in EI30 values. These values were analyzed from geostatistical technique, which can be divided into: descriptive statistics, adjust to semivariogram, cross-validation process and implementation of ordinary kriging to generate the erosivity map.Highest erosivity values were found in central and northeast regions of the State, while the lowest values were observed in the southern region. In addition, high annual precipitation values not necessarily produce higher erosivity values.

【 授权许可】

CC BY   
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