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.
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Showing 1 to 20 of 21 for “"Semi arid environment"”.
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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 …
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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 …
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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 …
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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 …
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Irrigation of acacia and eucalyptus species with waters of different salinities in a semi-arid environment in Formentera, Balearic Islands
… growth 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 …
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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 …
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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 …
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Life-history evolution and cooperative breeding in the sociable weaver
… colonial 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 …
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Forage Production and Quality of Forage Sorghum Intercropped with Sunnhemp at Different Seeding Rates
… the 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 …
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Modelling runoff generation and connectivity for semi-arid hillslopes and small catchments
The processes 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 …
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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, …
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Geological, historical and present-day erosion and colluviation in Lesotho, southern Africa
… of formation, and hence a reconstruction of past environments. The link between colluviation and gullying is examined. The research aims at reaching an understanding of erosion processes over varying timescales and spatial boundaries. Contradictory and often sparse data exists about environmental …
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Variação no padrão de atividade de mamíferos em resposta à sazonalidade em um parque nacional da floresta tropical seca brasileira
… seasonally dry tropical forest (Caatinga) is a semi-arid environment marked by a long dry period and a short rainy period that results in a great fluctuation in the conditions and resources for fauna. Medium to large mammals are usually the group most threatened by human activities, and thus are …
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Tails through time: leopard population dynamics in the Little Karoo
… landscapes is limited, especially in the semi-arid regions of southern Africa. This study, to the best of my knowledge, is the only multi-session maximum likelihood spatial capture-recapture (SCR) analysis to have been conducted in a semi-arid environment outside of a protected area in …
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Tails through time: leopard population dynamics in the Little Karoo
… landscapes is limited, especially in the semi-arid regions of southern Africa. This study, to the best of my knowledge, is the only multi-session maximum likelihood spatial capture-recapture (SCR) analysis to have been conducted in a semi-arid environment outside of a protected area in …
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Cover Crop Systems Impact on Biomass Production, Carbon-to-Nitrogen Ratio, Forage Quality, and Soil Health Indices in a Semiarid Environment.
Arid and semiarid agroecosystems of the United States are characterized by perennial challenges of water deficiency including low soil moisture retention, poor soil fertility, and vulnerability to both wind and water erosion. A soil restorative strategy that has been widely practiced to protect and …
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Water Transport in the Vadose Zone and Hydrological Processes in Soil-Plant-Atmosphere Continuum (SPAC) in West Texas, USA
… study, water transport within the SPAC under a semi-arid climate, including rain infiltration and evaporation mechanisms, have been investigated by a combination of on-site monitoring of meteorological and soil water data, isotope tracers, numerical simulations, and remote sensing at a natural …
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Review and gap analysis of Water Sensitive Urban Design (WSUD) in Windhoek, Namibia
… in sub-Saharan Africa. It is characterised by a semi-arid environment, with more than 80% covered by desert or semi-desert. The country is regularly afflicted by drought and has fluctuating and unreliable rainfall patterns, often accompanied by high evaporation rates. The City of Windhoek, as the …
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An Investigation into Sustainable Forest Policies and Practices in Syria
… land can be managed in a sustainable way in arid and semi-arid zones (ASAZs) of centralized countries is limited. Accordingly, this thesis seeks to analyse the role of government and communities, including women, in the formulation and implementation of sustainable forest management (SFM) …
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