Avaliação dos recursos hídricos da sub-bacia hidrográfica do rio Taperoá.

Abstract

This work had the intention to get technical information on availability, demand and quality of water for human consumption, animal consumption and irrigated agriculture in sources of supplying located in the sub-basin of River Taperoá. The gotten information had included the area of 23 cities that the sub-basin composes and its surroundings. Bibliographical research had been used, of field and laboratory, with observance of four parameters of act 518/04 of the Health department for analyzes of water for human consumption. To classify the water of animal consumption was used the norms of the National Academy of Sciences of U.S.A. and the waters of use for irrigation had been classified according to norms of the University of California Committee of Consultants (UCCC) (1974). An availability of approximately four billion cubical meters of water per year was detected to take care of a demand of human consumption, animal consumption and irrigated agriculture, of 8.301.989, 96 / m ³/year. In the water classification for human consumption it was observed that 34.2% of 199 analyzed sources had suffered restriction to the parameters from the Health department in at least an item. For the animal water consumption 76.4% of the evaluated sources they had been considered of excellent quality. For irrigated agriculture the waters had been classified as of none to slightly restriction in 89% of the sources analyzed on the subject of the salinity risk. With regard to the risk to provoke the elevation of sodium to the ground, with RAS between 0 and 40, in variety of conditions of electrical conduction, the percentage was of 75, 4%. The reservoirs that accumulate water in the hydrographic sub-basin of River Taperoá constitute the main factor of permanence of the man in this region. The dams characterizes as the most used method to keep water in great amounts for supplying in the long periods of waterlessness. In the agricultural zone, the Amazon pool and well in the dry stream beds of the rivers, contribute with a sufficiently significant parcel in the complement of the water supply for population, even though when they present some text of salinity. These sources are constructed without no previous study of water, ground or any another parameter that can indicate the presence of salt or its level purity.