Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 34 for “"arid environment"”.
-
A comparison of three seismic methods in the arid environment
… five to ten feet deep; The surface geologic environment in the southwestern desert was found to be unfavorable to the optimum offset reflection profiling method and the delay time method. Both yield misleading results when applied to shallow targets in the desert southwest. The refraction …
-
Evaluation of geophysical methods to characterize alluvial soils in the arid environment
Non-intrusive geophysical investigations, both seismic and electrical, were performed at several locations on the Las Vegas Springs Preserve in Las Vegas, Nevada, along with intrusive drilling. These investigations were conducted to determine whether it is possible use geophysical methods to detect …
-
Probabilistic estimation and prediction of groundwater recharge in a semi-arid environment
… recharge rates are difficult to resolve in dry environments, where groundwater is often most important. Motivated by such concerns, this thesis presents a new probabilistic approach for analyzing diffuse recharge in semiarid environments and demonstrates it for the Southern High Plains (SHP) in …
-
Remote Sensing For An Improved Geospatial Flash Flood Susceptibility Modeling Over An Arid Environment
… floods are the foremost cause of irretrievable environmental damage in the arid Arabian Peninsula. The better understanding of the geomorphologic, topographic, climatic, and hydrologic characteristics of a selected watershed, and determining their geospatial relationships with respect to the …
-
Ecology and morphology of the Kalahari tent tortoise, Psammobates oculifer, in a semi-arid environment
… Testudinid species, many of which inhabit arid or semi-arid areas, but ecological information on these species is scant. I studied the habitat, morphology and ecology of Kalahari tent tortoises over 13 months in semi-arid Savanna at Benfontein farm, Northern Cape Province, South Africa. In …
-
An economic and institutional assessment of groundwater recharge in an arid environment: Tucson Basin case study
The City of Tucson, located in a semi-arid region, faces escalating pressure on its groundwater resources associated with rapid urbanization and population growth over tbe past 50 years. Because of concern that the declining water table will threaten the city's development, bringing water from …
-
Physiological and behavioural adaptions of the hairy-nosed wombat (Lasiorhinus latifrons Owen) to its arid environment
v, 137 leaves : ill., (part col.) ; 26 cm.
-
Micrometeorological approaches to measure and model surface energy fluxes of irrigated citrus orchards in a semi-arid environment
The object of the research project was to propose and develop innovative theoretical methods for evaluating mass and energy exchange processes within one of the most relevant crop of the agricultural Sicilian context. The study was conceived as a long monitoring program of micrometeorological …
-
Seasonal patterns in body temperature and behaviour in Cape ground squirrels, Xerus inauris, living in a semi-arid environment
Miniature temperature-sensitive data loggers were implanted into the abdominal cavities of 16 free-ranging Cape ground squirrels, Xerus inauris, to investigate seasonal body temperature patterns. Data loggers recorded body temperature at 5-min intervals while microclimate variables were recorded in …
-
Irrigation of acacia and eucalyptus species with waters of different salinities in a semi-arid environment in Formentera, Balearic Islands
… rates could be obtained for trees in a semi-arid environment (Formentera, Balearic Islands) using small quantities of highly saline irrigation water. Soil improvement and avoidance of detrimental long term effects was a prime objective. Two species, Eucalyptus gomphocephala D.C. and Acacia …
-
Investigating the habitat selection and dietary preferences of a largely sedentary population of blue wildebeest in the Kgalagadi Transfrontier Park – impacts of permanent surface water provision in a semi-arid environment
… the Kgalagadi Transfrontier Park. However, other environmental variables may influence the distribution of this resident herd within the riverbeds of the Park. I explore the effects of water quality, forage abundance, tree density and river width on wildebeest habitat selection. I do this through …
-
Habitat utilisation by the white rhinoceros and status of the species in Namibia
… rhinoceros (Ceratotherium simum simum) in a semi-arid environment and established the history and current status of the species, following its introduction to Namibia.Most early introductions of white rhinos to private land were not successful due to poaching, over-hunting and poor management. The …
-
Quantifying Chlorophyll a Content Through Remote Sensing: A Pilot Study of Utah Lake
… a really large but shallow lake located in the arid environment of the Western United States. Due to a variety of factors it is listed by the Environmental Protection Agency as an "impaired water body" and must be closely monitored. Because of its large extent and shallow depth the water …
-
Life-history evolution and cooperative breeding in the sociable weaver
… nester that inhabits an unpredictable semi-arid environment. Sociable weavers face no obvious constraints on independent reproduction, yet cooperative breeding is common. Therefore, I also aimed at determining what factors prompt delayed reproduction in this species, since this life history …
-
Forage Production and Quality of Forage Sorghum Intercropped with Sunnhemp at Different Seeding Rates
… potential for the growth of sunnhemp in a semi-arid environment such as the Texas High Plains. Another objective of this research was to determine the effects of intercropping sunnhemp with forage sorghum at different seeding rates on dry matter production and forage quality. Results from this …
-
Studies of herbivory and vegetation change in Karoo shrublands
… of herbivore regimes might affect this arid environment. Specific objectives were to determine how grazing by domestic livestock brings about vegetation change, why such changes are sometimes irreversible, and whether existing conceptual models of vegetation dynamics adequately explain …
-
Modelling runoff generation and connectivity for semi-arid hillslopes and small catchments
… relating to runoff generation in a semi-arid environment at the hillslope scale are poorly understood. This research considers the amount and origin of water reaching the channel during a storm event using a combination of field experiments and computer simulation techniques. From the …
-
Human-Plant Interactions in Semi-Arid Regions: An Archaeobotanical Study of the Iron Age Site of Mtanye, Southwestern Zimbabwe
… where both symbionts benefit each other in an environment. The evidence of this relationship is confirmed by the use of plants across the globe, which constitutes a critical component in the livelihoods of people. It is likely to have been the case during the Iron Age period in Southern Africa, …
Page 1 of 2