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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.
11

Geology and hydrology of the Roswell Artesian basin, New Mexico.

Maddox, George Edward,1926- January 1969 (has links)
Three aquifers of diverse lithology and hydraulic character form the ground-water reservoir in the Roswell basin. The main aquifer, the carbonate aquifer, is developed in carbonate rocks of Permian age. It is the source of about two-thirds of the ground water pumped in the basin and receives more than 90 percent of the recharge to the basin. The second most important aquifer is the shallow aquifer which lies near the Pecos River in beds of sand and gravel of both Permian and Holocene age. About one-third of the ground water pumped in the basin comes from the shallow aquifer. Prior to pumping, the main source of recharge to the shallow aquifer was probably ground water leaking upward from the carbonate aquifer. Since pumping began, the main source of recharge to the shallow aquifer is probably return flow of irrigation water pumped from the carbonate aquifer. Natural discharge of ground water from the shallow aquifer into the Pecos River causes a gain in th.e base flow of the Pecos River in the Roswell basin. The third aquifer, the shallow-artesian aquifer, is in red beds and evaporite beds of Permian age. This aquifer overlies the carbonate aquifer and underlies the shallow aquifer. The shallow-artesian aquifer acts as a minor aquifer and also as a semi-permeable unit which partly confines ground water in the carbonate aquifer. Vertical permeability of the shallow-artesian aquifer is variable and depends on the lithology and thickness of the aquifer. Hydraulic head in the shallow-artesian aquifer also varies quite widely depending on the depth to which a well penetrates the aquifer. All ground-water aquifers in the basin transect formational boundaries and are therefore not closely related to the named geologic formations. A flow net analysis of the carbonate aquifer and of the shallow aquifer imply that geologic structure is important in the movement of ground water in the basin by limiting the transmissivity of the shallow and carbonate aquifers, by forming the present pattern of surface water drainage, and possibly by the contamination of fresh ground water by highly saline ground water. The flow net analysis also shows areas of recharge to the shallow and carbonate aquifers, and areas where the carbonate aquifer looses water to the shallow-artesian aquifer and to the shallow aquifer.
12

Bioassessment and the Partitioning of Community Composition and Diversity Across Spatial Scales in Wetlands of the Bonneville Basin

Keleher, Mary Jane 13 July 2007 (has links)
The Bonneville Basin encompasses an area that was covered by ancient Lake Bonneville and which today lies within the Great Basin province. The Bonneville Basin is distinguished geologically by its characteristic parallel north-south mountain ranges that are separated by broad, alluviated desert basins and valleys. Benches and other shoreline features of ancient Lake Bonneville prominently mark the steep, gravelly slopes of these ranges. Numerous artesian desert springs are present at the base of the mountains and in the valley floors that form various sizes of both isolated wetlands and wetland complexes. Many these wetlands are some of the most unique and currently some of the most threatened wetlands in the United States. Several aquatic species and communities have maintained an existence as relict populations and communities in these wetlands since the receding of Lake Bonneville over 10,000 years ago. For example, Hershler has described 58 previously undescribed species of hydrobiid snails, 22 of which are endemic to single locations. Like hydrobiid snails, numerous other species, such as the least chub, Iotichthys phlegethontis and the Columbia spotted frog, Rana luteioventris, depend on these wetlands for their continued existence, many of which are already imperiled. The continued decline and loss of these wetlands would further push many of these species toward endangerment and/or extinction. Several factors have already eliminated or altered many of these habitats including capping and filling,water depletions, agricultural practices, livestock grazing, and introduction of nonnative species. In recent years, the significant loss and degradation of wetlands resulting in sensitive species designations have provided impetus for resource agencies to develop and implement management plans to conserve and protect these vital ecosystems. One problem facing appropriate management is the lack of biological information for determining which wetlands should receive protection priorities based on the presence of viable, functioning characteristics. The purpose of this dissertation project was to obtain biological information needed to support defensible decisions concerning conservation, protection, acquisition, restoration, and mitigation of the artesian springs in the Bonneville Basin. The primary objectives of this project were to 1) Develop bioassessment procedures for artesian wetlands of the Bonneville Basin using macroinvertebrates and 2) Determine patterns of community composition and diversity for macroinvertebrates and metaphyton algae at multiple scales in Bonneville Basin artesian wetlands.
13

A Generalised Two Layer Model For Transient Flow To A Pumped Well

Badarinath, A 01 1900 (has links) (PDF)
No description available.
14

Modelo de negocio: T’andino, pan artesanal con cereales andinos / T’andino, handmade bread with Andean cereals

Altamirano Campos, Alisson Diana, Goicochea Garcia, Yaritza Ilyke, Omonte Salazar, Cesar Alejandro, Portugal Reyna, Klaudia Rocio Candy, Utus Salazar, Karolinne Brigite 04 December 2020 (has links)
Hoy en día, hay una creciente tendencia por consumir productos más saludables y al mismo tiempo también hay un gran interés del público por adquirir y consumir productos elaborados artesanalmente. Proponemos contribuir a esta tendencia, mediante el presente trabajo de investigación, de esta manera presentamos un pan elaborado artesanalmente, libre de preservantes, el cual tiene como principales ingredientes dos granos andinos, maca y quinua, que contribuyen positivamente a la salud cuando se consume regularmente. El producto esta ideado para formar parte de la vida cotidiana de las personas, sin hacer un esfuerzo grande, pues el pan es un alimento que se consume frecuentemente en los desayunos y forman parte de loncheras y/o refrigerios de las personas. Actualmente, en el mercado existen marcas que ofrecen panes con características similares, sin embargo, carecen de diversidad de productos en lo que respecta la variedad de presentación, sabores e insumos. Por este motivo, pretendemos satisfacer la creciente demanda a través de nuestros productos, y ofrecer al público lo que actualmente no encuentran en otras marcas; variedad de presentación, delicioso sabor e innovación en la elaboración del pan artesanal con insumos más variados. Asimismo, para la validación del negocio propuesto utilizamos herramientas como el design thinking para realizar los experimentos y la metodología concierge para validar las intenciones de compra y compras concretadas de nuestros productos, con los resultados obtenidos se procedió a realizar las proyecciones de ventas, para finalmente conocer el rendimiento financiero del emprendimiento. / Nowdays, there is a growing trend to consume healthier products and at the same time there is also a great public interest in acquiring and consuming artisan products. We propose to contribute to this trend, by means of the present research work, in this way we present a handmade bread, free of preservatives, which has as main ingredients two Andean grains, maca and quinoa, which contribute positively to health when consumed regularly. The product is designed to become part of people's daily lives, without making a great effort, as bread is a food that is frequently consumed at breakfast and forms part of people's lunch boxes and/or snacks. Currently, there are brands in the market that offer bread with similar characteristics, however, they lack diversity of products in terms of variety of presentation, flavors and inputs. For this reason, we intend to satisfy the growing demand through our products, and offer the public what they currently do not find in other brands; variety of presentation, delicious taste and innovation in the elaboration of artisanal bread with more varied inputs. Likewise, for the validation of the proposed business we used tools such as design thinking to carry out the experiments and the concierge methodology to validate the purchase intentions and concrete purchases of our products, with the results obtained we proceeded to make the sales projections, to finally know the financial performance of the venture. / Trabajo de investigación
15

Competitive Groundwater Usage from the Navajo Sandstone

Doye, F. H., Roefs, T. G. 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 / Groundwater modeling is used to theoretically relate mining pumpage of the Navajo Sandstone to declines in the potentiometric surface at Navajo and Hopi Indian community, domestic, and stock usage locations. The shallow wells on top of Black Mesa are shown to be part of a perched water table condition which is dependent upon the hydraulic conductivity of an aquatard known as the Mancos Shale. The isolation of the aquatard allows the shallow wells to be treated as a problem separate from that of the artesian and recharge areas. Computer modeling of the groundwater system is concerned only with those Indian wells which directly tap the Navajo Sandstone in either artesian or free water table areas. The computer simulation developed is a modified version of the basic artesian aquifer routine used by the Illinois State Water Survey. Computer results correspond with the low percentage of storage withdrawal calculated for the artesian area under Black Mesa.
16

Natural mechanisms of erosion prevention and stabilisation in a Marakele Peatland ; implications for conservation management

Bootsma, Antoinette Alexandra 12 1900 (has links)
The Matlabas mire, an actively peat accumulating wetland, is located in the headwaters of the Matlabas River, Marakele National Park, Limpopo Province, South Africa. Various seepage zones and artesian peat domes are contained in this peatland that consists of two tributaries of which the western one is partially channelled. The occurrence of decaying peat domes and desiccated areas with terrestrial vegetation, as well as the apparent erosion on the western tributary, have raised concerns on the health of this wetland. A network of piezometers was installed in the mire and results confirm that the system is fed primarily from seepage from the slopes of the catchment. Chemical analysis and temperature recorded indicate an isolated groundwater source of which the water does not mix with surface water. This is linked with isotope analysis of the age of peat in various sections of the mire. Erosion was attributed to anthropogenic changes in the catchment. Management recommendations include rehabilitation and reinstating the driving forces that support the mire. / Environmental Sciences / M. Sc. (Environmental Management)
17

The Groundwater Supply of Little Chino Valley

Matlock, W. G., Davis, P. R. 06 May 1972 (has links)
From the Proceedings of the 1972 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - May 5-6, 1972, Prescott, Arizona / The little chino valley in central Arizona presents an interesting groundwater study as withdrawals exceed recharge. The groundwater surface is falling at about 2 feet per year over most of the area due to large irrigation development. A shallow water table aquifer overlies the artesian aquifer and receives recharge from irrigation runoff. Water quality in the artesian aquifer is excellent. Water quality in the water-table aquifer is poorer, being somewhat higher in total salts, but is suitable for most domestic and agricultural uses. Specific yield for the supply area to the artesian aquifer is 12 percent, with estimated annual recharge of 4000 acre feet and leakage from the aquifer of 2300 acre feet. Water budget and use for the basin is presented with water level and water quality data. The multiphase aquifer system is described and illustrated.
18

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.
19

Les Paysages du vent : géohistoire et géoarchéologie de la dépression de Kharga (désert Libyque, Égypte) du cinquième siècle avant notre ère à nos jours : 2 500 ans d'interactions entre dynamiques éoliennes et activités humaines dans un milieu hyperaride / The Landscapes of the Wind : Géohistoire and Geoarchaeology of the Kharga Basin (Western Desert of Egypt) from the fifth century before Common Era to our days : 2,500 years long interactions between eolian dynamics and anthropogenic activities in a hyperarid environment

Crépy, Maël 02 December 2016 (has links)
Dans le désert Libyque (Égypte), l'un des plus arides du monde, l'action du vent trouvant peu de limites, l'ablation et le transport éoliens sont des éléments prégnants de la morphogenèse. Au cœur de ce désert, les oasis de la dépression de Kharga, nées de l'artésianisme et des activités humaines, constituent au contraire, par la profusion de l'eau et de la végétation, des secteurs où les processus de dépôt sont renforcés. L'imbrication entre une région désertique (zone-source de sédiments) et des sites oasiens (zones de dépôt), où s'appliquent des processus opposés, maximise les dynamiques éoliennes et leur impact morphogénétique. Il en découle la formation des paysages du vent, que cette thèse vise à décrire, comprendre et expliquer. Mobilisant des méthodes de géomorphologie, de géoarchéologie, de géohistoire et de sédimentologie, ce travail rend compte de l'impact paysager des interactions entre activités humaines et dynamiques éoliennes depuis la création des oasis il y a 2 500 ans. Il présente un bilan des processus naturels et anthropiques, et aborde la question des conditions de vie des oasiens depuis l'Antiquité.Trois apports principaux résultent de cette recherche :- une typologie des formations constitutives des paysages du vent- une modélisation descriptive du système à leur origine, reposant sur des cycles asynchrones de colonisation et de déprises- un bilan des grandes tendances de l'évolution environnementale et morphogénétique sur le temps long, depuis l'implantation des oasis : les paysages du vent sont nés de la distorsion entre la dégradation environnementale régionale et l'amélioration locale et temporaire des conditions édaphiques résultant des activités humaines. / The limiting features of the wind dynamics are scarce in the Western desert of Egypt, one of the most arid areas in the world: eolian ablation and transport are the prevailing factors of the morphogenesis. Born from artesian waters and human activities, the oases of Kharga basin form an area where the deposition processes are stronger thanks to the large amount of water and vegetation. Eolian dynamics, and their morphogenetic impacts, are strengthened by the nesting of oasis sites (deposition areas) in a desert region (sediment source-zone). The landscapes of the wind are thus formed by the juxtaposition of these areas where opposed processes occur. This thesis aims to describe, understand and explain their development.This work based on geomorphology, geoarchaeology, « géohistoire » and sedimentology gives an account on the impacts on the landscapes of the interactions between eolian dynamics and human activities since the creation of the oases 2 500 years ago. It consists in an overview of the natural and anthropogenic processes and an assessment of the living conditions in the oasis since the Antiquity.The three main results of this research are:- a typology of the elements forming the landscapes of the wind;- a descriptive modelisation of the system at stake in their formations, which is based on an asynchronous cycle of colonisation and abandonment of the sites;- an overview of the main patterns of the long-term environmental and morphogenetic evolution since the creation of the oases.This triple contribution shows that the landscapes of the wind are born from the distortion between the regional environmental trend towards degraded conditions and the local and temporary improvements of the edaphic conditions due to human activities.
20

Horský hotel / Mountain hotel

Vlček, Jan January 2019 (has links)
The aim of this diploma thesis is to design a mountain hotel in the village Rokytnice nad Jizernou. The object is placed on a sloping plot located in an attractive touristic and skiing area of mountain range Krkonoše. The mountain hotel has 4 floors and a basement. In the First floor there is a restaurant with a terrace, kitchen and administrative facilities of hotel. In the second and third floor we can find guest rooms and room for the hotel staff. In the basement there is wellness, technical facilities and garage compound. Construction of building is made of the reinforced concrete monolithic transverse frames with beam filling of ceramic block.

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