Erosive rainfall in Rio do Peixe Valley in Santa Catarina, Brazil: Part I - Determination of the erosivity index

Revista Brasileira de Engenharia Agricola e Ambiental

Pola, Augusto C.¹  Back, Álvaro J.¹  Ladwig, Nilzo I.²  Schwalm, Hugo² 

[1] Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina, Urussanga, Brazil;Universidade do Extremo Sul Catarinense, Criciúma, Brazil

关键词: soil loss;    soil conservation;    water erosion;    precipitation.;   

DOI  :  10.1590/1807-1929/agriambi.v21n11p774-779

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This study aimed to determine the rainfall erosivity index in the Valley of Rio do Peixe, in the state of Santa Catarina, Brazil. The data series of three rain gauge stations in the cities of Campos Novos, Videira, and Caçador were used to determine the rainfall erosivity based on the EI30 index and to adjust the equations in order to estimate the EI30 value from the rainfall coefficient. On average, it was observed that erosive rains represents 81.4-88.5% of the annual precipitation. The adjusted equations can be used to estimate rainfall erosivity in locations with only rainfall data. The regional equation specified for the erosivity estimation is EI30 = 74.23 Rc0.8087. The R factor is 8,704.8; 7,340.8; and 6,387.1 MJ mm ha-1 h-1 year-1 for Campos Novos, Videira, and Caçador, respectively. In Campos Novos and Videira, the erosivity was classified as high, while in Caçador, it was classified as average.

【 授权许可】

CC BY