Qualidade das águas subterrâneas do município de Frecheirinha- estado do Ceará e caracterização das obras de captação.

Abstract

This work was developed in the municipal seat of the municipality of Frecheirinha, in an area of 39km2. Frecheirinha is situated in the northwestern portion of Ceará, and borders by the following municipalities: Ubajara, south, Tianguá, west and Coreaú, east. The work began with data from 56 wells registered in SIAGAS/CPRM system. Of the 56 wells registered in SIAGAS/CPRM system, 51 could be visited throughout the municipality. When were possible updates have been made, as: owner, date of drilling, static water levei, flow, electrical conductivity, conservation status of the wells, water use and evaluated the progress of the construction of the wells. Subsequently 20 active wells, distributed in the municipal, were selected paying attention to a comprehensive spatial distribution, accessibility to measurements of electrical conductivity, pH, temperature, purpose and importance of water use. During all work the State of conservation of the wells were observed and described (with photos too). Of the 20 selected within the municipal seat wells, 10 were selected to perform Chemical analyzes. The parameters analyzed were: Chloride, Sodium, Magnesium, Calcium Sulphate, Iron, alkalinities for carbonate, bicarbonate and hydroxide, TDS, TS, and Turbidity. The results were submitted to ionic balance calculate, and treated with the computational program QualiGraf (ionic classification and irrigation), and contrasted with the 2.914 Ordinance, 2011 ofthe Ministry of Health.