Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/324663
Type: Artigo
Title: Estimates Of Annual Soil Loss Rates In The State Of São Paulo, Brazil
Author: Medeiros
Grasiela de Oliveira Rodrigues; Giarolla
Angelica; Sampaio
Gilvan; Marinho
Mara de Andrade
Abstract: Soil is a natural resource that has been affected by human pressures beyond its renewal capacity. For this reason, large agricultural areas that were productive have been abandoned due to soil degradation, mainly caused by the erosion process. The objective of this study was to apply the Universal Soil Loss Equation to generate more recent estimates of soil loss rates for the state of São Paulo using a database with information from medium resolution (30 m). The results showed that many areas of the state have high (critical) levels of soil degradation due to the predominance of consolidated human activities, especially in growing sugarcane and pasture use. The average estimated rate of soil loss is 30 Mg ha-1 yr-1 and 59 % of the area of the state (except for water bodies and urban areas) had estimated rates above 12 Mg ha-1 yr-1, considered as the average tolerance limit in the literature. The average rates of soil loss in areas with annual agricultural crops, semi-perennial agricultural crops (sugarcane), and permanent agricultural crops were 118, 78, and 38 Mg ha-1 yr-1 respectively. The state of São Paulo requires attention to conservation of soil resources, since most soils led to estimates beyond the tolerance limit.
Subject: Erosion
Usle
Soil Conservation
Gis
Geoprocessing
Editor: Sociedade Brasileira de Ciência do Solo
Rights: aberto
Address: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100551
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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