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REGRESSÃO DAS ENCOSTAS NA SUB-BACIA DO AÇUDE NAMORADO NA REGIÃO DO CARIRI-PB

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Author(s): Pablo Rodrigues Rosa | Ivandro de F. da Silva | Paulo Roberto de O. Rosa

Journal: CLIMEP : Climatologia e Estudos da Paisagem
ISSN 1980-654X

Volume: 2;
Issue: 1;
Start page: 43;
Date: 2007;
Original page

Keywords: Erosion | Environmental Vulnerability | Slope Regression | Stream flow.

ABSTRACT
The goal of this work is to show the main aspects of regressive erosion in the hydrographic basin that supplies the dam public Namorado, in São João do Cariri-PB. This article deals with thedynamic between morfogenesis and pedogenesis from the existing interaction between morfogenetics powers and the landscape. Therefore, the erosion becomes a quantifiable indicator,because in a hydrographic basin it is clearly indicated the lose of material caused by the mechanic of pluvial and fluvial processes. Based on the digital model of elevation, and on the geoprocessingof landscape data, it became clear that there is regressive erosion in the canals resulting from the high intensity rainfalls and the lack of vegetation coverage. Canals in areas with vegetationcoverage show intense receding with intensification in some specific seasons because of rainfall, that shows the vulnerability of semi-arid environment. It is concluded that the periods of relativestability do not supply the system with pedogenesis enough to maintain the balance between erosion and soil formation.
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