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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Aplicação de sistemas de informações geográficas e, gestão de recursos hídricos subterrâneos /

Barbosa, Sérgio Augusto. January 2007 (has links)
Orientador: Chang Hung Kiang / Banca: Monica Ferreira do Amaral Porto / Banca: Cláudio Antonio de Mauro / Resumo: Sistemas de informações geográficas permitem a visualização, manipulação e análise de dados espaciais, que podem incorporar diversos modelos hidrológicos. Esta dissertação apresenta a aplicação de Sistemas de Informações Geográficas em Gestão de Recursos Hídricos Subterrâneos, desenvolvendo funcionalidades de análises que possibilitam consistir as coordenadas de implantação de um poço contra temas da base cartográfica da aplicação; consistir a profundidade projetada para a poço contra as espessuras das unidades hidroestratigráficas; analisar dentro de um raio de proximidade do poço projetado a existência de outros poços e as vazões outorgadas; calcular o raio de interferência do poço; calcular a vazão explorável em função do tempo de bombeamento; analisar espacialmente a sobreposição dos raios de interferências entre poços e cadastrar as análises efetuadas. Foi utilizado a software ArcGIS como plataforma de SIG. 0 banco de dados foi implementado em formato Personal Geodatabase. A documentação de desenvolvimento de software utilizada seguiu os padrões estabelecidos pelo RUP­Rational Unified Process. 0 sistema foi aplicado e testado na Unidade de Gerenciamento de Recursos Hídricos do Pontal do Paranapanema (UGHRI-22), no estado de São Paulo, tendo sido incorporadas as unidades hidroestratigráficas dos sistemas aqüíferos Bauru e Guarani. / Abstract: The geographic information systems (GIS) are capable of visualization, manipulation and analysis of georeferenced data, providing interface capability with different hydrological models. This dissertation focus on the application of geographic information systems in the context of groundwater management, proViding functionalities of analysis which allow to link and check the coordinates and the depths of a projected water well to the various thematic database. It analyzes within a range of the radius of influence of the projected well the number and total discharge of the existing wells. Furthermore, it calculates the interference radius of the well and the maximum rate of production as function of pumping time. It analyzes the overlapping of wells and records the results of the analysis. The dissertation uses the ArcGIS software system as working platform for GIS. The database was implemented in the Personal Geodatabase format. The documentation of software development followed the protocols established by RUP - Rational Unified Process. The system was applied and tested in the Water Resource Management Unit of Pontal do Paranapanema (UGHRI-22), in the state of Sao Paulo, incorporating hydrostratigraphical units of the Bauru and Guarani aquifer systems. / Mestre
2

Applications of Finite Element and Computer Graphics Techniques in Aquifer Analysis

O'Donnell, D. F., Wilson, L. G., Rasmussen, W. O. 12 April 1975 (has links)
From the Proceedings of the 1975 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 11-12, 1975, Tempe, Arizona / Aquifer flow systems have been simulated by a variety of techniques. The results of these simulations can be presented in several ways. Of the approaches in modeling groundwater flow, the finite element method offers an advantage through its ease in approximating various boundary conditions. Graphic methods offer a means of simplifying data presentation. This study demonstrates the use of a finite element technique in modeling aquifer flow systems, and illustrates a 3-dimensional graphic approach when representing the results of the modeling.
3

Aplicação de sistemas de informações geográficas e, gestão de recursos hídricos subterrâneos

Barbosa, Sérgio Augusto [UNESP] 04 December 2007 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:26:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-12-04Bitstream added on 2014-06-13T20:54:22Z : No. of bitstreams: 1 barbosa_sa_me_rcla_prot.pdf: 4243732 bytes, checksum: d8d48af38f82a7055a18d2daabc32e88 (MD5) / Sistemas de informações geográficas permitem a visualização, manipulação e análise de dados espaciais, que podem incorporar diversos modelos hidrológicos. Esta dissertação apresenta a aplicação de Sistemas de Informações Geográficas em Gestão de Recursos Hídricos Subterrâneos, desenvolvendo funcionalidades de análises que possibilitam consistir as coordenadas de implantação de um poço contra temas da base cartográfica da aplicação; consistir a profundidade projetada para a poço contra as espessuras das unidades hidroestratigráficas; analisar dentro de um raio de proximidade do poço projetado a existência de outros poços e as vazões outorgadas; calcular o raio de interferência do poço; calcular a vazão explorável em função do tempo de bombeamento; analisar espacialmente a sobreposição dos raios de interferências entre poços e cadastrar as análises efetuadas. Foi utilizado a software ArcGIS como plataforma de SIG. 0 banco de dados foi implementado em formato Personal Geodatabase. A documentação de desenvolvimento de software utilizada seguiu os padrões estabelecidos pelo RUP­Rational Unified Process. 0 sistema foi aplicado e testado na Unidade de Gerenciamento de Recursos Hídricos do Pontal do Paranapanema (UGHRI-22), no estado de São Paulo, tendo sido incorporadas as unidades hidroestratigráficas dos sistemas aqüíferos Bauru e Guarani. / The geographic information systems (GIS) are capable of visualization, manipulation and analysis of georeferenced data, providing interface capability with different hydrological models. This dissertation focus on the application of geographic information systems in the context of groundwater management, proViding functionalities of analysis which allow to link and check the coordinates and the depths of a projected water well to the various thematic database. It analyzes within a range of the radius of influence of the projected well the number and total discharge of the existing wells. Furthermore, it calculates the interference radius of the well and the maximum rate of production as function of pumping time. It analyzes the overlapping of wells and records the results of the analysis. The dissertation uses the ArcGIS software system as working platform for GIS. The database was implemented in the Personal Geodatabase format. The documentation of software development followed the protocols established by RUP - Rational Unified Process. The system was applied and tested in the Water Resource Management Unit of Pontal do Paranapanema (UGHRI-22), in the state of Sao Paulo, incorporating hydrostratigraphical units of the Bauru and Guarani aquifer systems.
4

Salinity Problems of the Safford Valley: An Interdisciplinary Analysis

Muller, Anthony B. 05 May 1973 (has links)
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.
5

Water Quality Problem of the Urban Area in an Arid Environment, Tucson, Arizona

Hansen, G. 15 April 1978 (has links)
From the Proceedings of the 1978 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 14-15, 1978, Flagstaff, Arizona / The U.S. Environmental Protection Agency 's two-year 208 area-wide Water Quality Management Study for Pima County, Arizona, is discussed in terms of the specific problems of municipal wastewater effluent, industrial wastewater, urban stormwater runoff, land disposal of residual wastes, septic systems, and construction activities related to the City of Tucson urban area. The primary groundwater and the slow cycling of the hydrologic system in this arid urban environment reduce many water pollution problems to insignificant levels in the short term, (2) there does exist significant long-term pollution problems in the area. These problems include urban stormwater runoff and landfill leachate, and are related to the pollution of groundwater recharge and aquifer water supplies, and (3) there is a strong need for total water resource planning in arid urban areas which includes planning for wastewater reuse, water harvesting, and proper management of groundwater recharge systems.

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