Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil
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.
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Sociedade Brasileira de Ciência do Solo
2016
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oai:scielo:S0100-068320160001005512016-12-20Estimates of Annual Soil Loss Rates in the State of São Paulo, BrazilMedeiros,Grasiela de Oliveira RodriguesGiarolla,AngelicaSampaio,GilvanMarinho,Mara de Andrade erosion USLE soil conservation GIS geoprocessing 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.info:eu-repo/semantics/openAccessSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo v.40 20162016-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100551en10.1590/18069657rbcs20150497 |
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Medeiros,Grasiela de Oliveira Rodrigues Giarolla,Angelica Sampaio,Gilvan Marinho,Mara de Andrade |
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Medeiros,Grasiela de Oliveira Rodrigues Giarolla,Angelica Sampaio,Gilvan Marinho,Mara de Andrade Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
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Medeiros,Grasiela de Oliveira Rodrigues Giarolla,Angelica Sampaio,Gilvan Marinho,Mara de Andrade |
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Medeiros,Grasiela de Oliveira Rodrigues |
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Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
title_short |
Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
title_full |
Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
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Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
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Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil |
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estimates of annual soil loss rates in the state of são paulo, brazil |
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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. |
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Sociedade Brasileira de Ciência do Solo |
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2016 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100551 |
work_keys_str_mv |
AT medeirosgrasieladeoliveirarodrigues estimatesofannualsoillossratesinthestateofsaopaulobrazil AT giarollaangelica estimatesofannualsoillossratesinthestateofsaopaulobrazil AT sampaiogilvan estimatesofannualsoillossratesinthestateofsaopaulobrazil AT marinhomaradeandrade estimatesofannualsoillossratesinthestateofsaopaulobrazil |
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