Trends in Hydrological Parameters of a Southern Brazilian Watershed and its Relation to Human Induced Changes

Jorge Moraes, Giampaolo Pellegrino, Maria Ballester, Luiz Martinelli, Reynaldo Victoria and Alex Krusche

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 1998, vol. 12, issue 4, 295-311

Abstract: The Piracicaba river basin is a subtropical watershed located in the southeastern region of Brazil. With an area of 12 400 km 2 , the basin is a typical example of new landscape resulting from development in tropical and sub-tropical regions: establishment of intensive industrial and agricultural processes were followed by significant population growth and water management. This scenario has led to significant increase in water demand and decrease in water quality. The main objective of this study is the detection of changes in the patterns of flow and precipitation in the basin, and its possible relation to man-induced changes. Statistical analyses were performed on records of precipitation, evapotranspiration and streamflow, from 1947 to 1991. Precipitation and evapotranspiration totals showed significant increasing trends for the entire basin. From eight streamflow gauge stations, half showed significant decreasing trend. The most probable cause of such trends is the export of water from the basin to the metropolitan region of São Paulo city. Copyright Kluwer Academic Publishers 1998

Keywords: changing-point; human induced changes; hydrology; time series; trend analysis (search for similar items in EconPapers)
Date: 1998
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Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:spr:waterr:v:12:y:1998:i:4:p:295-311

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DOI: 10.1023/A:1008048212420

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