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Universidade de Tras os Montes E Alto Douro (2020)

Estudo da vulnerabilidade dos sistemas hídricos do Concelho de Vila Pouca de Aguiar

Soares, Sara Maia

Titre : Estudo da vulnerabilidade dos sistemas hídricos do Concelho de Vila Pouca de Aguiar

Auteur : Soares, Sara Maia

Université de soutenance : Universidade de Tras os Montes E Alto Douro

Grade : Mestrado em Geociências Aplicadas 2020

Résumé
With the ongoing debate on climate change and the scarcity of natural resources, there is a growing awareness that the planet is changing and something must be done for the future. One of the most important resources is water. Without it, the human being can not live and it is therefore important to evaluate its quality and quantity for the population. The study area selected was Vila Pouca de Aguiar because it has a mostly underground supply system. It is an area in the interior of Portugal, belonging to the district of Vila Real. Not very populated, but in July and August, it is added by the return of emigrants and tourists on vacation. A quantitative assessment was made by calculating the discharge volumes of the springs, the vertical holes and the Torno dam that helps supply Vila Pouca de Aguiar. These values were subtracted monthly from the population consumption values and it was possible to determine that there are some areas with water deficit such as Vila Pouca de Aguiar and Bornes de Aguiar. For better management of water resources, it is suggested to create a system that combines both groundwater and surface water. The parishes with excess water would supply the reservoirs and those with deficits could use this excess of the rest for their inhabitants. The proposed location would be the Cabouço region for its good location, large vegetation cover and good groundwater availability throughout the year. As it is not just the amount of water that matters, a qualitative assessment of the water resources of the area concerned has been made. The DRASTIC method was used in the ArcGis program to calculate the seven parameters. Some of these parameters had some vulnerability percentage in some sectors of the municipality, but when all interpolated, it was possible to determine that the actual vulnerability of the municipality was low because they have different weights in the calculation. As it is an inland area where the soil is used for agricultural purposes, as regards the qualitative assessment of the possibility of nitrate contamination, it has been found that they validate the DRASTIC method calculated by the fact that something very similar and related is obtained. Nitrates have a direct relationship with precipitation. The higher the value of precipitation, the lower the value of the presence of possible contaminants. In sectors where rainfall is lower, there are other factors that delay the infiltration of potential contaminants. This municipality has its water resources at low vulnerability and is protected. However, this study suggests better management and prevention and protection of Vila Pouca de Aguiar waters.

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Page publiée le 23 mars 2021