Precipitation Trends and Variability in River Basins in Urban Expansion Areas

A. C. Oscar-Júnior ()
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A. C. Oscar-Júnior: State University of Rio de Janeiro

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2021, vol. 35, issue 2, No 14, 674 pages

Abstract: Abstract River basins are important territorial units for geographical analysis, and are crucial for environmental planning, especially in metropolitan settings. The aim of this article was to evaluate rainfall trends and variability in the Guapimirim-Macacu basin, located in an urban development area in the Rio de Janeiro Metropolitan Region. Annual, monthly and daily records were collected from twenty rain gauge stations, for the period of 1967 to 2015. Analyses conducted using the RClimDex software revealed an increase in rainfall volume and number of wet days. The remaining indicators and patterns observed across stations also suggested that changes in precipitation trends occurred mostly on the day scale, and were likely attributable to global climate change. After controlling for seasonality and normalizing the series, a linear tendency between the mean monthly precipitation in the Guapimirim-Macau basin and sea surface temperature (SST), obtained from the National Centers for Environmental Prediction, revealed that rainfall in the region is strongly correlated with Pacific and Atlantic SST, revealing the importance of the South Atlantic Convergence Zone for rainfall variability in the area of study, especially in summer. These data are important for development planning and the management of water resources and supply in the Rio de Janeiro Metropolitan Region.

Keywords: Water resources; Teleconnection; Climate change; Rio de Janeiro Metropolitan Region; South Atlantic convergence zone (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s11269-020-02749-4

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