Thesis (M.Sc.(Engineering Geology))--University of Pretoria, 2000. / Abstract in English. Includes bibliographical references (leaves 60-62).

Thesis--University College of Denver, 2005. / Includes bibliographical references (p. 229-236) and abstract. Also available on the Internet.

Thesis (M.S.)--University of California, Santa Cruz, 1998. / Typescript. Includes bibliographical references (leaves 42-45).

Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisors: David M. Hillis and Dean Hendrickson. Vita. Includes bibliographical references.

Thesis (M.Sc.)--York University, 2004. Graduate Programme in / Typescript. Includes bibliographical references (leaves 152-169). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: LINK NOT YET AVAILABLE.

Submitted by Renato de Toledo Peres null (renatperes@yahoo.com.br) on 2017-04-21T17:07:18Z No. of bitstreams: 1 Peres Renato Dissertacao.pdf: 7038574 bytes, checksum: d9f1ed96e483b611af44c57d2cb6ca20 (MD5) / Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-04-25T19:01:22Z (GMT) No. of bitstreams: 1 peres_rt_me_rcla.pdf: 7038574 bytes, checksum: d9f1ed96e483b611af44c57d2cb6ca20 (MD5) / Made available in DSpace on 2017-04-25T19:01:22Z (GMT). No. of bitstreams: 1 peres_rt_me_rcla.pdf: 7038574 bytes, checksum: d9f1ed96e483b611af44c57d2cb6ca20 (MD5) Previous issue date: 2017-02-13 / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Com o aumento da produção agrícola do país nas últimas décadas, a água, recurso fundamental na agricultura, passou a merecer especial atenção. Estudos recentes mostram que boa parte da água utilizada não é recarregável, principalmente quando se trata de fontes profundas, como de aquíferos confinados (GASTMANS et. al, 2013). Esta condição pode levar a situações de déficit hídrico, agravadas pela possibilidade de seca em boa parte do território nacional, como foi registrada nos últimos anos. Uma das formas propostas para contribuir com o melhor aproveitamento dos recursos hídricos é entender a relação que existe entre retirada das águas subterrâneas com seu uso na produção agrícola. Diante disto, este trabalho propõe um estudo sobre a água incorporada na agricultura e sua exportação, com inferências sobre os volumes da produção agrícola brasileira, e uma reflexão acerca da vulnerabilidade dos mananciais hídricos, a partir de um estudo de caso no município de Holambra/SP. / With the increase of the agricultural production of the country in the last decades, water, a fundamental resource in agriculture, has come to deserve special attention. Recent studies show that much of the water used is not rechargeable, especially when it comes from deep sources such as confined aquifers (GASTMANS et al, 2013). This condition can lead to situations of water deficit, aggravated by the possibility of drought in a large part of the national territory, as recorded in recent years. One of the ways proposed to contribute to the best use of water resources is to understand the relationship between the withdrawal of groundwater and its use in agricultural production. In view of this, this work proposes a study on the water incorporated in agriculture and its export, with inferences about the volumes of the Brazilian agricultural production, and a reflection on the vulnerability of the water sources, from a case study in the municipality of Holambra/SP. / FAPESP: 2014/05309-2

Diversos métodos geofísicos têm sido empregados para a identificação de zonas fraturadas em rochas cristalinas a fim de locar pontos de perfuração de poços tubulares. Os métodos geoelétricos têm tido um papel importante na identificação destas zonas fraturadas, no entanto, em áreas urbanas sofrem com a falta de espaço e interferências diversas, o que limita suas aplicações. O presente trabalho visou correlacionar as anomalias geoelétricas típicas de zonas fraturadas em rochas cristalinas, com medidas de emanação natural de radônio a fim de estabelecer parâmetros que possam ser aplicados em áreas onde os fatores externos impeçam a execução dos métodos geoelétricos, uma vez que os fatores que interferem na aplicação desses métodos não interferem na emanação do radônio. Os resultados encontrados nas áreas investigadas mostraram uma boa correlação entre as anomalias geoelétricas e as anomalias de emanação de radônio, bem como foram boas as correlações com os resultados de vazão dos poços existentes nas áreas investigadas. A metodologia aqui proposta alcançou os objetivos podendo ser uma excelente ferramenta para prospecção de água subterrânea, tanto como método auxiliar, quanto como ferramenta principal de prospecção de aqüíferos em áreas onde outros métodos não possam ser aplicados devido a interferências diversas tais como: tubulações metálicas, fiações elétricas, entre outras. Estes tipos de interferências são bastante comuns em áreas urbanas, justamente onde a perfuração de poços é mais requerida. / A several geophysical methods have been used for the identification of shear zones in crystalline rocks in order to mark points to water well drilling. The geoelectrical methods have had an important role on the identification of these shear zones. However, in urban areas they suffer with the lack from space and diverse interferences, what it limits the application of these ones. The present research aimed to correlate the typical electrical anomalies of shear zones in crystalline rocks, with measures of natural emanation of radon, in order to establish parameters that can be applied in areas where the external factors hinder the execution of the geoelectrical methods, because the factors that intervene with the application of these methods do not intervene with the emanation of the radon. The results found in the investigated areas had shown a good correlation with the electrical anomalies and the radon emanation anomalies, as well as had been good the correlations with the results of yield of water wells on the investigated areas. The methodology proposal reached the objectives being able to be an excellent tool for groundwater prospection, as a auxiliary method auxiliary, as a main tool of prospection of fractured aquifers in areas where other methods cannot be applied due several interferences, as metallic pipes, electric wirings, and others. These types of interferences are sufficiently common in urban areas, exactly where the water well drilling its more necessary.

The Madison Limestone forms a highly productive aquifer in the Powder River basin, Wyoming. The Madison in the study area is a highly fractured limestone, 90 to 200 m thick, with significant percentages of dolomite. Study of Madison water quality in Weston and Crook Counties, Wyoming indicated rapid flow through the aquifer, little or no intrusions from adjacent strata, and absence of evaporite deposits throughout the study area. Ground-water ages near the Black Hills monocline were calculated by using tritium data and flow-net analysis. Both methods predicted water ages of less than 210 years at Newcastle and Osage, Wyoming. Calculated seepage velocities were on the order of 0.8 m/day. Geochemical and hydrodynamic data suggested that the Black Hills monocline is a major feature in the Madison flow system. Changes in the water quality and potentiometric gradient perpendicular to the axis of the monocline indicated that little water is traveling westward from the recharge areas into the deep centeral basin, a high-transmissivity zone exists along the axis of the monocline, and the high-transmissivity zone along the monocline may be the major pathway for Madison ground water flowing out of the eastern Powder River basin.

The Tucson Basin is a semi-arid alluvial basin in southeastern Arizona in which the Santa Cruz River, an ephemeral stream, flows south to north with its flows resulting directly from rainfall. The City of Tucson discharges treated sewage effluent into the bed of the Santa Cruz and to some irrigated farms. Previous investigations indicate that sewage effluent is recharging the Tucson Basin Aquifer with the water spreading horizontally in the Fort Lowell Formation. The ¹⁸0/¹⁶0 ratios determined in water samples by the author support the findings of these previous investigations. Sewage effluent had an average δc0-18 value of -7.9 per mil and water samples from the north Santa Cruz wells had an average δc0-18 value of -9.3 per mil. Up hydraulic gradient, the ¹⁸0/¹⁶0 ratios are lighter indicating that sewage recharge water has mixed with ground water. In the case of one well in the mixed zone, it is calculated that approximately 70 percent of the water comes from sewage recharge and 30 percent from normal ground water. Recharge water spreads horizontally in the Fort Lowell Formation up to two miles on each side of the river. The δc0-18 values of water samples from the south Santa Cruz wells averaged -8.9 per mil and compared closely to the average δc0-18 values for summer flows in the Santa Cruz River of -8.2 per mil.

Magister Scientiae - MSc / Aquifer vulnerability assessment is increasingly becoming a very significant basis in order to fulfill the water demands in South Africa. Knowledge of soil hydraulic properties that consists of the soil water retention and hydraulic conductivity functions is a prerequisite for predicting solution transport in soils. The overall objective of the study was to develop a database of hydraulic properties for collected undisturbed samples and to test selected models by making use of this database. / South Africa