SOCIAL AND ENVIRONMENTAL HYDROGRAPHICS IMPLICATIONS OF THE LAND USE IN THE PLAIN AND COASTAL BOARDS BETWEEN ILHÉUS AND OLIVENÇA – BA

Abstract

Listen

Translate article

Between the diverse units geomorphologicals of the Bahia, are presents also the coastal plains and the coastal trays. Following to present line of beach, healthy noticed by its sandy forms, with colorings homogeneous. Diverse works exist about the genesis litologics of those geomorphological rooms. It researches of big relevance published in national scope as the of Suguio (1975), Martin (1976) and Dominguez (1980) attribute of unanimous form the genesis of the present coastal plain and trays to the interactions between the erosive forces of the sea and depositional conditions on the part of the continental rivers. The objective of that work was map the Coastal Plain and the Coastal Tray in the stretch between Ilhéus and Olivença, and discuss about the activities of use of him soil that grant hidrographics impacts and partner-environmental about both. It was carried out the mapping in scale of detail (1:5.000) of the coastal plain utilizing image IKONUS high-resolution. The corresponding zone to the plain at present is utilized in diverse typologies of use of him soil, since cultivations to property lots. The friable texture of the substrate implies in a sensibility the antropological interventions in the same one. The deforestation in the trays, the urban growth, the extraction of sand and the absence of specific plannings for those rooms geomorphologicals are the present causes of hidrographics degradation and partner-environmental problems to same. The intention of that work is going to dispose facts for contribute with better planning in the area of study