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Universidade Estadual do Ceará (2005)

SISTEMAS AMBIENTAIS SEMI-ÁRIDOS E AS EVIDÊNCIAS DE DEGRADAÇÃO/DESERTIFICAÇÃO NO MUNICÍPIO DE CANINDÉ - CEARÁ - BRASIL

Gomes Brito Érika

Titre : SISTEMAS AMBIENTAIS SEMI-ÁRIDOS E AS EVIDÊNCIAS DE DEGRADAÇÃO/DESERTIFICAÇÃO NO MUNICÍPIO DE CANINDÉ - CEARÁ - BRASIL

Auteur : Érika Gomes Brito

Université de soutenance : Universidade Estadual do Ceará

Grade : Mestrado 2005

Résumé
The municipality de Canindé, situated in the semiarid « sertão » central of the Ceará state was chosen for this study to show evidences of the generalized degradation of the natural resources, caused by the intensive exploration through the agriculture, the extractive vegetation and of the cattle creation. In this way, it looked to detect evidences of degradation/desertification processes of the natural resources, from an integrated geo-environmental characterization and the interventions of the land use, with the establishment of environment systems. On the basis of the systemic analysis, this study was developed in four main phases : Analysis phase - assessment of natural resources and the anthropogenic activities to provide a basic geo-environmental data set ; b) Aggregation phase - selection and linking of the most important parameters ; c) Integration phase - systematic integration of natural site and the anthropogenic impacts data to define environment systems and degradation/desertification susceptibility ; and d) Application phase - landscape assessment and detection of evidences of degradation/desertification processes. In study proceeding, the data was analyzed, aggregated and integrated by the techniques of remate sensing and geographic information systems (GIS). On the basis of the environment criterions it was identified nine semiarid environment systems : 1) Sertão of Canindé, 2) Sertão of Salão, 3) Sertão of Targinos, 4) Ubiraçu-Salitre intermountain depression, 5) Iguaçu-Campos intermountain depression, 6) Machado Residual Mountain, 7) Occidental crystalline subwet dry of Baturité Mountain, 8) Residual crestes and « Inselbergs », and 9) Alluvial plains and provisory flood areas. Application of thematic numeric evaluation showed evidences of degradation/desertification of the renewed natural resources main in the Sertão of Salão and Machado Residual Mountain.

Mots Clés : Semi-árido ; Sistemas ambientais ; Desertificação ; Canindé- Ceará.

Présentation

Page publiée le 26 décembre 2011, mise à jour le 6 septembre 2018