O sistema aquífero Barreiras na região de Parnamirim, RN: uso das águas e potencialidades
The study area is within the Pirangi River Basin, eastern sector of Rio Grande do Norte state, where is located of the Parnamirim city. It has an area of approximately 370 km². Urbanization has developed much fast without an appropriate infrastructure, mainly by the lack of sewage systems, with r...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/21061 |
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| Resumo: | The study area is within the Pirangi River Basin, eastern sector of Rio Grande do Norte state,
where is located of the Parnamirim city. It has an area of approximately 370 km².
Urbanization has developed much fast without an appropriate infrastructure, mainly by the
lack of sewage systems, with risks of contamination of groundwater that may cause serious
damage to the health of the population. The Barreiras Aquifer System groundwater in the area
represents the main source of water supply for urban and rural populations. The use of
groundwater occurs without adequate planning and therefore, important recharge areas are
being occupied. This study was conducted to quantify the use and evaluation of the potential
of groundwater, in order to increase good water quality supply and lower risks of being
affected by polluting activities. With these objectives, the following activities were carried
out: 268 points of water have been registered; characterization of the lithological, thickness
and hydrogeological structure of the Barreiras aquifer, based on the correlation of well logs;
and evaluation of hydrodynamic parameters of the aquifer, from the interpretation of results
well pumping tests. It was found that the saturated thickness increases from west to east
towards the sea, with values ranging from 15,47-56,5 m with an average of 32,45 m. The
hydrodynamic parameters using Cooper-Jacob method were: average transmissivity of
5,9x10-3 m²/s and average hydraulic conductivity 2,82x10-4 m/s. The effective porosity is of
15%, obtained by applying Biecinski equation. The potentiometric map shows the main
direction of groundwater flow, from west to east, and identifies the recharge areas
corresponding to the region of the tablelands of the "Barreiras". The river valleys refer to the
discharge areas of the aquifer system. The Recharge was estimated at 253 mm/year, which
corresponds to the 16.4% rate of infiltration. |
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