Soil erosion by water estimated for 99 Uruguayan basins

Abstract Soil erosion can be accelerated by agricultural intensification, and the soil loss can alter the quality of water bodies. Sustainable agricultural production therefore requires the management of erosion and potential water pollution. In Uruguay, where there is heavy use of soil for agricult...

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Autores principales:	Carrasco-Letelier,Leonidas, Beretta-Blanco,Andrés
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2017
Materias:	Erosion GIS RUSLE USLE watersheds
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200184
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spelling	oai:scielo:S0718-162020170002001842017-09-26Soil erosion by water estimated for 99 Uruguayan basinsCarrasco-Letelier,LeonidasBeretta-Blanco,Andrés Erosion GIS RUSLE USLE watersheds Abstract Soil erosion can be accelerated by agricultural intensification, and the soil loss can alter the quality of water bodies. Sustainable agricultural production therefore requires the management of erosion and potential water pollution. In Uruguay, where there is heavy use of soil for agriculture, there is a need to continually develop and update erosion management policies. In this framework, we estimated the erosion in 99 drainage basins by analyzing and managing the information required (K, L, S, C and R-factors) in the universal soil loss equation (USLE) and the revised universal soil loss equation (RUSLE) in a geographical information system (GIS). The studied drainage basins encompass 73% of the area of Uruguay. The results include the following values: the K-factor range from 0.0073 to 0.088 (t ha h)(ha MJ mm)−1, the R-factor range from 3,547 to 9,342 (MJ mm)(ha h yr)−1, the C-factor range from 0 to 0.155, the slope gradients are less than 4.3% in 78% of the soils, and the multiplicative products of L and S are less than 0.73 in 75% of the cases. The drainage basin characteristics allowed the identification of 4 homogeneous regions based on their erosion behavior. The northern-western-southern basins cluster and Sierras del Este basins clusters indicate the possibility of managing their erosion through control of vegetation cover, which is represented by the C-factor. In general, this forecast of soil erosion by water (92.9% of the soil polygons and 99.9% of the drainage basins) indicates a mean soil loss of less than 7 t (ha yr)−1 corresponding to the land cover surveyed in 2011.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.44 n.2 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200184en10.7764/rcia.v44i2.1717
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Erosion GIS RUSLE USLE watersheds
spellingShingle	Erosion GIS RUSLE USLE watersheds Carrasco-Letelier,Leonidas Beretta-Blanco,Andrés Soil erosion by water estimated for 99 Uruguayan basins
description	Abstract Soil erosion can be accelerated by agricultural intensification, and the soil loss can alter the quality of water bodies. Sustainable agricultural production therefore requires the management of erosion and potential water pollution. In Uruguay, where there is heavy use of soil for agriculture, there is a need to continually develop and update erosion management policies. In this framework, we estimated the erosion in 99 drainage basins by analyzing and managing the information required (K, L, S, C and R-factors) in the universal soil loss equation (USLE) and the revised universal soil loss equation (RUSLE) in a geographical information system (GIS). The studied drainage basins encompass 73% of the area of Uruguay. The results include the following values: the K-factor range from 0.0073 to 0.088 (t ha h)(ha MJ mm)−1, the R-factor range from 3,547 to 9,342 (MJ mm)(ha h yr)−1, the C-factor range from 0 to 0.155, the slope gradients are less than 4.3% in 78% of the soils, and the multiplicative products of L and S are less than 0.73 in 75% of the cases. The drainage basin characteristics allowed the identification of 4 homogeneous regions based on their erosion behavior. The northern-western-southern basins cluster and Sierras del Este basins clusters indicate the possibility of managing their erosion through control of vegetation cover, which is represented by the C-factor. In general, this forecast of soil erosion by water (92.9% of the soil polygons and 99.9% of the drainage basins) indicates a mean soil loss of less than 7 t (ha yr)−1 corresponding to the land cover surveyed in 2011.
author	Carrasco-Letelier,Leonidas Beretta-Blanco,Andrés
author_facet	Carrasco-Letelier,Leonidas Beretta-Blanco,Andrés
author_sort	Carrasco-Letelier,Leonidas
title	Soil erosion by water estimated for 99 Uruguayan basins
title_short	Soil erosion by water estimated for 99 Uruguayan basins
title_full	Soil erosion by water estimated for 99 Uruguayan basins
title_fullStr	Soil erosion by water estimated for 99 Uruguayan basins
title_full_unstemmed	Soil erosion by water estimated for 99 Uruguayan basins
title_sort	soil erosion by water estimated for 99 uruguayan basins
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200184
work_keys_str_mv	AT carrascoletelierleonidas soilerosionbywaterestimatedfor99uruguayanbasins AT berettablancoandres soilerosionbywaterestimatedfor99uruguayanbasins
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Soil erosion by water estimated for 99 Uruguayan basins

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