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Universidade Federal de Alagoas (2022)

Análise sobre o estado de conservação das nascentes no município de Olho D’Água do Casado, Alagoas.

Bezerra, Aerton de Andrade

Titre : Análise sobre o estado de conservação das nascentes no município de Olho D’Água do Casado, Alagoas.

Analysis pm the conservation status of springs in the municipality of Olho D’água do Casado, Alagoas

Auteur : Bezerra, Aerton de Andrade

Université de soutenance : Universidade Federal de Alagoas

Grade : Mestrado em Geografia 2022

Résumé partiel
The springs in the semiarid region, in addition to their environmental characteristics and qualities, have socio-environmental actions that may have their conservation status altered. The study area is located in the municipality of Olho D’Água do Casado, in the Mesoregion of Alagoas and in the Alagoas microregion of the Sertão do São Francisco, the springs are inserted in these circumstances, where the low level of water related to the environmental situation of the place and the anthropic actions have been causing problems of environmental degradation. Faced with these questions, the general objective of the research was to carry out a study aiming at an analysis of the state of conservation of the springs. The method that conducted the study was the experimental one, with a quantitative and qualitative approach. Bibliographic and documentary studies were carried out, water collections were carried out for analysis of the physical parameters : Total Dissolved Solids (mg/L), Electrical Conductivity (μS/cm), Turbidity (NTU) and Temperature (°C), chemicals : Hydrogen Potential (pH ), Total Nitrogen (mg/L), Total Phosphorus (mg/L), Biochemical Oxygen Demand (mg/L) and Dissolved Oxygen (mg/L), and biological : Thermotolerant Coliforms (NMT) in the laboratory, having the collection in December 2020 for the dry season and in May 2021 for the rainy season. Sediments were also collected for sedimentological analysis in October 2020, in the identification of watercourses and the mapping of springs, geological maps and land use and occupation maps were prepared, characterization regarding the perenniality and the development of an educational booklet , aimed at improving the relationship between Society and nature and the presentation of the activities carried out by the project in the period 2018/2021. The results showed that the analyzed springs presented perenniality during the researched years, in accordance with the physical, chemical and biological parameters through the seasonality of the dry and rainy seasons. Some samples showed values above the reference limit established by government agencies

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