Thesis (M. Sc.)--University of Hong Kong, 2004.

Made available in DSpace on 2014-06-11T19:32:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-02-14Bitstream added on 2014-06-13T19:21:52Z : No. of bitstreams: 1 maranesi_da_dr_rcla.pdf: 1020550 bytes, checksum: feb48c33c653eac3647154e9696768ed (MD5) / A região ocupada pelo bioma Cerrado, no Triângulo Mineiro, a partir das últimas três décadas, vem experimentando um acelerado processo de expansão agrícola/pecuária. A crescente necessidade hídrica para este desenvolvimento implicou a construção de inúmeros pequenos reservatórios superficiais de água dentro dos canais de drenagem em bacias de até 3ª ordem. Este tipo de ocupação antrópica, normalmente feita sem um conhecimento adequado tanto do meio físico como das técnicas construtivas, vem contribuindo para o surgimento de diversos problemas ambientais. Este trabalho apresenta o estudo sobre esta ocupação dentro deste bioma, realizado em uma superfície de 2918,89 km2, pertencente à folha de Tupaciguara-MG, em escala regional de 1:100.000. Inicialmente, foi produzido um levantamento de campo sobre os aspectos construtivos empregados para a confecção destes pequenos reservatórios. Em paralelo, foi desenvolvido um estudo sobre o conjunto de atributos do meio físico, adotando-se os procedimentos de mapeamento geotécnico e tendo como base a proposta metodológica de ZUQUETTE (1987 e 1993), representado em 6 documentos cartográficos básicos. A seguir, procedeu-se à análise e sistematização dos documentos cartográficos produzidos na fase anterior, resultando em dois novos documentos cartográficos (carta de declividade generalizada e carta de predisposição à erosão). A caracterização geotécnica dos materiais inconsolidados, realizada a partir de ensaios de laboratório, possibilitou a determinação da textura, massa específica dos sólidos, limites de consistência, compactação e permeabilidade. Finalmente, a análise conjunta de todos os documentos produzidos nas fases anteriores gerou a carta de avaliação geoambiental, que indica as potencialidades e as limitações para este tipo de ocupação no ambiente... / The region occupied by the environment of the Brazilian Cerrado, a typical vegetation from the west of Minas Gerais State which is called Triângulo Mineiro, since the last three decades, has been experiencing a quick process of agricultural and cattle raising expansion. The increasing hydric necessity for this developing led to the construction of many small superficial water dams inside the draining channels for bays until the 3rd order. This type of human occupation, usually done without an appropriate knowledge from either the physical medium or the constructive techniques, has been contributing for the appearance of several environmental problems. This work presents the studies about the occupation inside this environment, which is done over an area of 2918,89 km2, belonging to the chart of Tupaciguara-MG, using a regional scale of 1:100000. Initially, it was done a field research about constructive issues applied for the construction of these small dams. As a parallel work, it was developed a study about the set of features of the physical medium, using the procedures of geotechnical charting and based upon the methodological proposal of ZUQUETTE (1987 and 1993), presenting 6 basic cartographic documents. Afterwards, it was done the analysis and systematization of the cartographic documents developed on the former phase and the result was two new cartographic documents (general sloping chart and erosion tendency chart). The geotechnical description of the unconsolidated materials, which was done using laboratory tests, made possible the determination of the texture, specific solid masses, consistence limits, compactation and permeability. Finally, the analysis of all the documents together produced on the former phases generated the geoenvironmental evaluation chart that indicates the possibilities and limitations for this specific environmental occupation...(Complete abstract click electronic access below)

The sedimentary rocks of the Karoo Supergroup cover approximately 75% of the surface area of South Africa. Major projects have been constructed on and in these rocks with a number of tunnelling projects such as the Lesotho Highlands Water Project and the Orange-Fish Tunnel. The mechanical properties of these rocks have been well studied and recorded through research and construction projects. During the exploration phase for shale gas, two deep boreholes were drilled in the southern part of the Main Karoo Basin, near Willowvale and Ceres. This provided the opportunity to access rock samples from deep formations. Various laboratory tests were done on selected cores to be able to determine the engineering properties and strength characteristics of the deep Karoo Supergroup rocks, and these engineering properties and strength characteristics are compared to the shallow or near surface rocks, which is presented in this dissertation. Five core samples from the Willowvale borehole (KWV-01) were retrieved for laboratory testing, which include samples of a dolerite sill, sandstone from the Pluto’s Vale Member, carbonaceous shale from the Whitehill Formation, massive shale from the Prince Albert Formation, and lastly, tillite from the Dwyka Group. Four core samples were retrieved from the Ceres borehole (KZF-01) and, included fine sandstone from the Tierberg Formation, carbonaceous shale from the Whitehill Formation, shale from the Prince Albert Formation and diamictite from the Dwyka Group. The density, porosity, water absorption, specific gravity, slake durability, free swelling and mineralogy of the different rock samples were determined and compared between the two boreholes (KZF-1 & KWV-1), as well as with those of the known properties of the near surface Karoo rocks published in literature, and also results from twelve surface samples collected during this research project. The Geodurability Classification system is used to classify the core samples, so as to determine its durability. The sandstone, shale and tillite show increased UCS, durability, density, and lower expansiveness when moving from surface deeper into the Main Karoo Basin rocks. / Dissertation (MSc (Engineering Geology))--University of Pretoria, 2021. / Geology / MSc (Engineering Geology) / Unrestricted

This thesis describes an investigation of the hydraulics of the southwest quadrant of a drumlin in Eastern Massachusetts. A road salt storage facility was located on the site and had contaminated the groundwater. The drumlin was found to consist of a layer of natural fill, a layer of brown till, and a layer of gray till sitting directly on bedrock. Values obtained from laboratory testing were all typical for glacial till. Groundwater monitoring wells were installed around the site for monthly groundwater quality sampling, measurement of piezometric head, and slug tests. Piezometric head varied periodically with time with variations from a yearly average that decreased with depth. Hydraulic conductivity measured from the slug tests varied almost over five orders of magnitude, with no lateral trend, but a general decreasing trend with depth. Data were analyzed with mathematical equations and a numerical three-dimensional model. Both models yielded results consistent with each other and measured values. Based on the models, bedrock was found to be permeable but incompressible. Test pits revealed oxidation, root holes, and discontinuities in the brown till. The discontinuities were analyzed using analytical equations, and it was found that these could explain the wide range of hydraulic conductivities in the brown till. The wide range of the hydraulic conductivity in the gray till could be explained by the presence boulders and cobbles in the gray till creating channels for groundwater flow. Groundwater flow was found to be primarily vertical through the brown till, then radial at the brown gray/till interface because of the lower mean hydraulic conductivity of the gray till. Highest radial flow and chloride flux occurs to the southwest towards a landfill located directly downhill from the salt storage facility, with minimal flow in the other directions. Chloride contamination was shown by the calibrated model to flow primarily by advection, so it follows the same path as the groundwater. Background chloride concentrations in the deep wells in the gray till confirm that the chloride does not enter deep into the gray till.

Thesis (M. Sc.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.

No description available.

Thesis--M. Phil., University of Hong Kong, 1986.

Thesis (M. Sc.)--University of Hong Kong, 2005.

Orientador: José Humberto Barcelos / Banca: Cláudio Antonio de Mauro. / Banca: Silvio Carlos Bray. / Banca: Antonio Giacomini Ribeiro. / Banca: Luiz Nishiyama. / Resumo: A região ocupada pelo bioma Cerrado, no Triângulo Mineiro, a partir das últimas três décadas, vem experimentando um acelerado processo de expansão agrícola/pecuária. A crescente necessidade hídrica para este desenvolvimento implicou a construção de inúmeros pequenos reservatórios superficiais de água dentro dos canais de drenagem em bacias de até 3ª ordem. Este tipo de ocupação antrópica, normalmente feita sem um conhecimento adequado tanto do meio físico como das técnicas construtivas, vem contribuindo para o surgimento de diversos problemas ambientais. Este trabalho apresenta o estudo sobre esta ocupação dentro deste bioma, realizado em uma superfície de 2918,89 km2, pertencente à folha de Tupaciguara-MG, em escala regional de 1:100.000. Inicialmente, foi produzido um levantamento de campo sobre os aspectos construtivos empregados para a confecção destes pequenos reservatórios. Em paralelo, foi desenvolvido um estudo sobre o conjunto de atributos do meio físico, adotando-se os procedimentos de mapeamento geotécnico e tendo como base a proposta metodológica de ZUQUETTE (1987 e 1993), representado em 6 documentos cartográficos básicos. A seguir, procedeu-se à análise e sistematização dos documentos cartográficos produzidos na fase anterior, resultando em dois novos documentos cartográficos (carta de declividade generalizada e carta de predisposição à erosão). A caracterização geotécnica dos materiais inconsolidados, realizada a partir de ensaios de laboratório, possibilitou a determinação da textura, massa específica dos sólidos, limites de consistência, compactação e permeabilidade. Finalmente, a análise conjunta de todos os documentos produzidos nas fases anteriores gerou a carta de avaliação geoambiental, que indica as potencialidades e as limitações para este tipo de ocupação no ambiente...(Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The region occupied by the environment of the "Brazilian Cerrado", a typical vegetation from the west of Minas Gerais State which is called "Triângulo Mineiro", since the last three decades, has been experiencing a quick process of agricultural and cattle raising expansion. The increasing hydric necessity for this developing led to the construction of many small superficial water dams inside the draining channels for bays until the 3rd order. This type of human occupation, usually done without an appropriate knowledge from either the physical medium or the constructive techniques, has been contributing for the appearance of several environmental problems. This work presents the studies about the occupation inside this environment, which is done over an area of 2918,89 km2, belonging to the chart of "Tupaciguara-MG", using a regional scale of 1:100000. Initially, it was done a field research about constructive issues applied for the construction of these small dams. As a parallel work, it was developed a study about the set of features of the physical medium, using the procedures of geotechnical charting and based upon the methodological proposal of ZUQUETTE (1987 and 1993), presenting 6 basic cartographic documents. Afterwards, it was done the analysis and systematization of the cartographic documents developed on the former phase and the result was two new cartographic documents (general sloping chart and erosion tendency chart). The geotechnical description of the unconsolidated materials, which was done using laboratory tests, made possible the determination of the texture, specific solid masses, consistence limits, compactation and permeability. Finally, the analysis of all the documents together produced on the former phases generated the geoenvironmental evaluation chart that indicates the possibilities and limitations for this specific environmental occupation...(Complete abstract click electronic access below) / Doutor

published_or_final_version / Applied Geosciences / Master / Master of Science