Planejamento ambiental como subsídio para gestão ambiental da bacia de drenagem do açude Paulo Sarasate Varjota-Ceará

Abstract

The work aims at planning and management environmental catchment Açude Paulo Sarasate, located in the municipality of Varjota – EC, in western state of Ceará, with an area of 3,501square kilometers. In this study, tried to contextualize the research area by analysis of geoenvironmental system attributes (geology, geomorphology, climate, water resources, soils, vegetation and (fauna) and ways to use and occupy the land. The base design was used to analyze geo were made bibliographic, cartographic and fieldwork. Based on this methodology were identified three environmental units: Depression Hinterland, the river plain of the river and the Solid Acaraú Residuals. Was used as the basic tool remote sensing, through a process of digital Landsat 7 satellite images, thematic maps have been prepared having as support the leaves SUDENE / DSG SB.24-VB- I (Clover St.) and the leaf SB.24-V-B-I (IPU) (1:100,000), the portion of the unit Geoenvironmental studied represented based on a scale of 1:50,000. Upstream of the dam are the Paulo Sarasate Hidrolândia municipalities, Ipueiras, New Russia, Catunda Ararendá, Monkfish and Monsignor Tabosa, and four important reservoirs of the river basin with Acaraú accumulation capacity similar to water in the reservoir study, they were: Farias de Sousa (Nova Russas), Carão (Tamboril), Aroeiras (Nova Russas), Bonito (Ipú). Great of the areas upstream of the dam Paulo Sarasate, is in the process of deforestation rather pronounced as in the case of area sources of the river Acaraú. Thus there is an occurrence of processes siltation, solifluxion, Gullies and ravines in strands, resulting in the decreased flow river water in the gutters. Another relevant factor is the population growth of small centers urban municipalities, and the creation or change of habits, “improvement of living standards”, the industrial development (micro enterprises) and a number of other factors. The diagnosis made possible the definition of proposals for planning strategies and environmental management in order to restore, maintain and environmental preservation through zoning in scales of 1:100,000 (regional), accompanied by a plan management at municipal level, 1:100,000. Keywords: Planning. Management Environmental. Semi-Arid. River Basin.