Forestation in Northeastern Brazil and Its Influence on Quantity and Quality of Runoff

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by Guilherme C. Andrade, EMPARN, Caico, Brazil,
Ricardo A. L. Brito, EMPARN, Caico, Brazil,
Walter P. Lima, EMPARN, Caico, Brazil,

Document Type: Proceeding Paper

Part of: Watershed Management in the Eighties:

Abstract: A study is being conducted in Northeastern Brazil, at Cruzeta, in the Semi-Arid Tropic, to estimate runoff and soil displacement caused by precipitation and the influence of vegetation on quantity and quality of the runoff water. Three 'micro-basins' of approximately 1. 0 ha each were selected and had pluviometers and discharge recorders installed on them. One micro-basin was kept with native vegetation, (Caatinga forest), one was cleared out, and the third one was forested with 'Algaroba' (Prosopis juliflora). Although the region has a low rainfall average (537 mm annually), the rains occur in a stormy pattern and considerable runoff occurs, as well as soil erosion.

Subject Headings: Runoff | Developing countries | Vegetation | Rainfall-runoff relationships | Rain water | Tropical soils | Water quality | Arid lands | Brazil | South America

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