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Impact of Livestock in the Water Quality of Pinhal River Sub-Basin, Santa Catarina State-Brazil

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica  701P0210cd.(doi:10.13031/2013.29460)
Authors:   Julio Cesar Pascale Palhares, Antonio Lourenço Guidoni, Jalusa Deon Kich, Ricardo Luis R Steinmetz, Magda Regina Mulinari, Jaqueline Bianca Klein, Luciane Coldeblla, Gustavo Plieske, Gilbert C Sigua
Keywords:   dairy cow, pig, poultry, water quality, watershed

Brazil is one of the largest producers of animal protein in the world. Productions are concentrated in certain regions of the country. It is a constant threat to the quantity and quality of water resources. The objective of this study was to evaluate the impact of livestock in the superficial water quality of Pinhal River. Sub-basin is located in Concordia, West part of Santa Catarina State. Eight sampling Sites representing different land-uses (LU1- dairy cattle; LU2- without animals; LU3- dairy + pigs + poultry + crops; LU4 pigs + poultry + crops; LU5 dairy + pigs + poultry + crops + human; LU6 dairy + pigs + crops; LU7 and LU8- dairy + pigs) along the Pinhal River were sampled from 2006 to 2009. Compare the collection points was normal factor. These points were assessed longitudinally, we create two other factors to be combined: 8 points x 2 seasons (dry and wet) and 8 points x 4 seasons (summer, spring, autumn, winter). LU1 presented the worst water quality with high concentrations of TSS, COD, TP, Fecal Coliform and E. coli. In this point, cows had access to the river. The highest concentration of nitrate was found at the mouth of the river. There were higher concentrations of TSS, DO, N-NO2 and NO3-N in wet season. At this time, there was intensive soil management with fertilizers to planting corn. Autumn and winter presented the worst water quality to nitrogen, phosphorus and coliforms. During spring and summer presence of Salmonella was higher. There was a relationship between the type of pollution source, cows, pigs and poultries, and water quality. Control the use of animal and chemical fertilizers in agriculture and repair the riparian zone will improve water quality.

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