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Estimation of local rainfall erosivity using artificial neural network

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Author(s): Teodorico Alves Sobrinho | Caroline Alvarenga Pertussatti | Lais Cristina Soares Rebucci | Paulo Tarso Sanches de Oliveira

Journal: Ambiente e Água : An Interdisciplinary Journal of Applied Science
ISSN 1980-993X

Volume: 6;
Issue: 2;
Start page: 246;
Date: 2011;
Original page

Keywords: artificial intelligence | soil conservation | water erosion

ABSTRACT
The information retrieval of local values of rainfall erosivity is essential for soil loss estimation with the Universal Soil Loss Equation (USLE), and thus is very useful in soil and water conservation planning. In this manner, the objective of this study was to develop an Artificial Neural Network (ANN) with the capacity of estimating, with satisfactory accuracy, the rainfall erosivity in any location of the Mato Grosso do Sul state. We used data from rain erosivity, latitude, longitude, altitude of pluviometric and pluviographic stations located in the state to train and test an ANN. After training with various network configurations, we selected the best performance and higher coefficient of determination calculated on the basis of data erosivity of the sample test and the values estimated by ANN. In evaluating the results, the confidence and the agreement indices were used in addition to the coefficient of determination. It was found that it is possible to estimate the rainfall erosivity for any location in the state of Mato Grosso do Sul, in a reliable way, using only data of geographical coordinates and altitude.
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