A gis-based tool for estimating soil loss in agricultural river basins.
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2016
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Resumo
Soil erosion is a major problem observed in terrestrial ecosystems. Monitoring
and identifying potential areas for erosion becomes extremely important for the better
management of these areas. The main aim of this study was to develop a Geographic
Information System script tool based on the universal soil loss equation (USLE), which
calculates soil loss in three large agricultural sub-basins. Algorithms were implemented
in the graphical interface of ModelBuilder and later in Python programming language,
thus allowing the creation of a specific script to calculate soil loss in an automatic way.
The "USLE Paracatu Watershed" script was validated and proved to be effective in estimating
erosion in the three sub-basins with an average processing time of half second
per km2. This can be added via "ArcToolbox" toolbox in ArcGIS software, so that the
user only has to add the variables of the USLE equation and the software will process
the algorithms in an automatic way, generating the final map with the soil loss value
(t/ha.year). The friendly interface of the script allows it to be used in any area, only
requiring the user to enter the updated data of parameters that compose the equation.
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Universal soil loss equation, Script, Watershed
Citação
FUJACO, M. A. G.; LEITE, M. G. P.; NEVES, A. H. C. J. A gis-based tool for estimating soil loss in agricultural river basins. REM - International Engineering Journal, v. 69, p. 417-424, 2016. Disponível em: <http://www.scielo.br/scielo.php?pid=S2448-167X2016000400417&script=sci_abstract>. Acesso em: 25 ago. 2017.