Saneamento urbano e qualidade das Ãguas de pequenas obras hÃdricas na Ãrea de XingÃ

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This work dealt with the environmental sanitation (water supply, sewage, drainage, solid wastes, and public health) in the urban zone of 29 municipalities of Xingà area. The research showed the main deficiencies found through surveys on site and by consultings in official institutions. The Xingà area is entirely located in the semi-arid zone of Brazil. According to the results obtained in this research, the Xingà area usually showed a deficient sanitary infrastructure and management. PoÃo Redondo municipality is located in the state of Sergipe, and it belongs to Xingà area. It was selected for a specific research. In this specific study the water quality for human consumption purposes of small sized water works (1 well with desalinator, 20 cisterns, and 8 water traps) was evaluated. Besides, semi-structured 307 questionnaires survey by house interview were applied for getting information about public services, according to the opinion of dwellers. The water quality monitoring has been accomplished in 4 wells with desalinator installed in the Xingà area. In addition, soil samples were collected in the disposal site of water desalinator wastes. Concerning the permeate produced by desalination units, several results showed that some water quality parameters did not always comply the water quality standards, as such pH (permeate produced in the Aroeira and Icozeira desalinators), TDS (total dissolved solid) and chloride (permeate produced in the Areias desalinator), and thermotolerant coliforms (permeate produced in the Areias, Aroeira, Icozeira, and Minuim desalinators). According to the results obtained, the concentrate from 4 desalinators monitored showed high concentrations of chloride, TDS, and electrical conductivity. The concentrate from Areias (PoÃo Redondo) desalinator reached the highest values: 6226 mg/L (chloride), 26826 mg/L (TDS), and 18020 mS/cm. The results of soil samples collected in the disposal sites of concentrate from these desalinators showed that the discharge is harmful to soil. Even so, the concentrate from desalinators installed in the Xingà area has been disposed without any criterion. It was found that of total of 56 desalinators, only 11 have been producing water. This occured due to the lack of suitable technical operations and maintenance. The water quality stored in the cisterns, usually, did not comply entirely with the potable water standards, mainly the pH and the presence of thermotolerant coliforms. This occured due their unsuitable sanitary protection, and because these units not have been used for storing rainwater only. The water quality stored in the water traps must not be consumed by inhabitants, because the parameters apparent colour, turbidity, and the presence of thermotolerant coliforms did not comply with the potable water standards. In the opinion of majority of the interviewed inhabitants, in the rural zone, a highest proportion (38,87%) declared that the most efficient public service was the public health, while in the urban zone the highest proportion (32,06%) answered that the best public service was the solid waste collection. On the other hand, the highest proportion of inhabitants living in both zones of PoÃo Redondo answered that the poorest public service was the sewerage

ASSUNTO(S)

educacao saneamento ambiental Ãrea de xingà water supply environmental sanitation water quality xingà area qualidade de Ãgua, abastecimento de Ãgua

ACESSO AO ARTIGO

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