Made available in DSpace on 2014-07-29T15:01:44Z (GMT). No. of bitstreams: 1 DAnnyell Nogueira.pdf: 1253060 bytes, checksum: f659e9378a6f840582e2bff89b8b243e (MD5) Previous issue date: 2010-09-03 / The research developed sought to contribute to the conservation of groundwater resources, aiming in developing a Geographic Information System (GIS) as a tool to manage the use of groundwater targeting the sustainable use, for public supply in the city of Aparecida de Goiânia/GO. In order to achieve this, a Geographic Information System (GIS) was used for the registration of deep wells, continuing the research with a study of natural vulnerability by mapping the information obtained wich relates the potential sources of contamination. Data collection took place through a consultation with the Information System for Groundwater (SIAGAS) and through the System of Statistics and Geographic Information of the State of Goiás (SIEG). Through the database development it was possible to apply the DRASTIC method adapted by Narciso and Gomes (2005) and GOD method proposed by Foster and Hirata (1988) for mapping vulnerability to contamination of groundwater resources. In order to apply the DRASTIC method adapted, maps were generated for slope, land use, geology, geomorphology, water resources and human occupation. The map resulting from this method shows four classes: low, medium, high and very high, showing that of the 288 square kilometers of this city, almost 80% were classified as having medium vulnerability fir the groundwater quality. For the GOD method, maps of the degree of hydraulic confinement, geology and depth or distance of the groundwater level were generated. The map resulting from this process had only three classes: negligible, low and high, showing that 76% of the area was classified as having a negligible vulnerability. This occurred because this method does not consider human occupation. / A pesquisa desenvolvida buscou contribuir para a conservação dos recursos hídricos subterrâneos, tendo como objetivo o desenvolvimento de um Sistema de Informação Geográfica (SIG) como instrumento de gestão para a utilização das águas subterrâneas visando o seu uso sustentável, para o abastecimento público na cidade de Aparecida de Goiânia/GO. Para atingí-lo utilizou-se um Sistema de Informações Geográficas (SIG) para o cadastramento dos poços tubulares profundos, procedendo assim ao estudo da vulnerabilidade natural, através do mapeamento das informações obtidas, além de relacionar as fontes potenciais de contaminação. A obtenção dos dados deu-se através da consulta ao Sistema de Informações de Águas Subterrâneas (SIAGAS) e através do Sistema Estadual de Estatística e de Informações Geográficas de Goiás (SIEG). Estes dados possibilitaram a elaboração do banco de dados e a aplicação do método DRASTIC adaptado por Narciso e Gomes (2005) e do método GOD proposto por Foster e Hirata (1988), para a geração de mapas de vulnerabilidade à contaminação dos recursos hídricos subterrâneos. Para a elaboração do método DRASTIC adaptado foram gerados os mapas de declividade, uso do solo, geologia, falhas geológicas, recursos hídricos e ocupação humana. O mapa resultante desse método apresentou quatro classes: baixa, média, alta e muito alta, sendo que dos 288 quilômetros quadrados deste município, aproximadamente 80% foi classificado como tendo vulnerabilidade média para a qualidade das águas subterrâneas. Para o método GOD foram gerados os mapas de grau de confinamento hidráulico, ocorrência do substrato litológico e profundidade ou distância do nível da água subterrânea. O mapa resultante desse processo apresentou apenas três classes: desprezível, baixa e alta, sendo que 76% da área foi classificado como vulnerabilidade desprezível, por este método não considerar a ocupação humana.

From the Proceedings of the 1973 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - May 4-5, 1973, Tucson, Arizona / A change in groundwater quality, averaging approximately +0.13 millimhos electrical conductivity and +35 ppm chloride per year, has been documented between 1940 and 1972 with data from ten long -term sample wells. The decrement in the water quality of the surficial aquifer seems to be attributable to four major mechanisms. An increase in salinity may be expected from leakage of saline water from the artesian aquifer. Such leakage would be stimulated by pumping- caused reduction of confining pressure, and by the puncture of the cap beds by deep wells. Water reaching the aquifer from natural recharge may contribute salts to the system. Such recharging water, if passed through soluble beds, could contribute to the salt. Lateral movement of water through similar deposits may be a contribution, and the concentration and infiltration of agricultural water could also add to aquifer salinity. The economic analysis of the Safford Valley, based on the modeling of a "Representative Farm" analog, indicates that cotton will remain economical to produce on the basis of the projected salinity trends, for a significant time beyond limits of prediction. The analysis indicates that the optimum salt-resistant crops for the area are being cultivated, and, of these, alfalfa will cease to be productive in large areas of the valley by 1990. The entire valley will not produce alfalfa for profit by 2040. The methodologies shown in the paper indicate how pumping influences salinity change and outline salinity control recommendations for the area.