Abstract
This work describes the Meruoca’s water supply and discusses the factors that have influenced thequantity and quality of groundwater. Four hydrogeological situations in the area were considered: alteration mantle andfractured crystalline rocks, whose structure is good to storage water; no fractured crystalline rocks, represented bygranites and volcanic rocks, that aren’t good to storage water. The Meruoca’s groundwater supply is achieved mainly bydug wells (87%), followed tube wells (9%) and natural sources (4%). Dug wells water levels were monitored during 3years and was verified that the water table changes from 1.0 m up to 6,0 m. Was observed that the water level in the dugwells has immediate response during the rain, attesting the condition of an unconfined aquifer. Nine samples werecollected to complete chemical analysis and eighteen (18) samples to partial analyses, including the nitrogenous seriescompounds (NH4, NO2 e NO3). The chemical results indicated Na-HCO3 and Na-Cl water type. The quality of water isgood to human supply, in most of the cases.
Highlights
This work describes the Meruoca’s water supply and discusses the factors that have influenced the quantity and quality of groundwater
O sistema de abastecimento hídrico do município de Meruoca é composto de 245 pontos de água (Figura 1), constituídos de poços escavados (87%), poços tubulares (9%) e fontes naturais (4%), de acordo com o cadastro de poços realizado por Vasconcelos et al, (2003), o que mostra a importância da água subterrânea para o abastecimento da população local
São encontrados em todos os sistemas de Drenagem e dentre as unidades hidrogeológicas são as mais utilizadas no abastecimento do município, pois os poços escavados captam água desta unidade
Summary
Foi realizado um mapeamento geológico para a identificação das áreas relativamente favoráveis à ocorrência de águas subterrâneas. Tabela 1 - Pontos de água do município de Meruoca distribuídos por sistemas de drenagem.
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