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 422 for “"semi-arid"”.
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Geoarchaeology in semi-arid landscapes
… the potential of open-air sites in the semi-arid interior. Research at open-air sites poses analytical difficulties, such as poor preservation of organic materials, which has led to an oversight of the archaeological potential of open-air sites. This creates a knowledge gap regarding …
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Water use of mature pecan orchards under semi-arid conditions
… 14-year-old mixed cultivar pecan orchard in the semi-arid Northern Cape Province of South Africa. This is one of the hotter and drier pecan production regions in South Africa and was expected to differ from where most of the pecan water use research was conducted in the United States of America …
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How rewilding impacts ecosystem health in a semi-arid region
… as a means to fund restoration projects in semi-arid settings, but ultimately concluded that a more nuanced approach is likely needed in the form of biodiversity credits. Ultimately, this study provides tentative evidence that well-managed rewilding can indeed assist in restoring degraded …
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A case study: Brown-green infrastructure in a semi-arid
… Most critically however, Windhoek is a semi-arid landscape and not necessarily “green”. This begs the question: Does “green” infrastructure have to be green? In semi-arid regions, many green infrastructure practices may not be “green” at all. 3 Windhoek, will therefore be used as a case …
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Livestock impact assessment and restoration strategies in the semi-arid Karoo
Karoo rangelands exhibit spatial and temporal patterns that have important implications for the livestock industry. Spatially, there are gradients, often abrupt, in ecosystem structure and functioning, while plant composition and productivity are highly variable over time. A predictive …
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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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Sustainable management of semi-arid African savannas under environmental and political change
… services. In addition, in highly variable semi-arid environments changing future environmental conditions will potentially have severe consequences for productivity and ecosystem dynamics. Hence, global efforts have to be made to understand the particular causes and consequences of dryland …
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Large-scale hydrological modelling in the semi-arid north-east of Brazil
Semi-arid areas are, due to their climatic setting, characterized by small water resources. An increasing water demand as a consequence of population growth and economic development as well as a decreasing water availability in the course of possible climate change may aggravate water scarcity in …
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Probabilistic estimation and prediction of groundwater recharge in a semi-arid environment
… approach for analyzing diffuse recharge in semiarid environments and demonstrates it for the Southern High Plains (SHP) in Texas. Diffuse recharge in semi-arid and arid regions is likely to be episodic, which could have important implications for groundwater. Our approach makes it possible …
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Vegetation dynamics in a semi-arid freshwater wetland: a measure for restoration success
… regeneration, in previously degraded wetlands of semi-arid regions is essential to measure restoration success. Nylsvley freshwater wetland is the largest inland flood plain found in the semi-arid region of South Africa and a Ramsar site of worldwide conservation importance. It provides a habitat …
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Non-perennial streamflow & geomorphic patterns in a semi-arid rangeland slated for development
… especially for non-perennial streams in semi-arid rangelands. Non-perennial streams tend to lack a historical baseline with complete records of streamflow presence and absence. A historical pre-development baseline allows for better consideration when making development and infrastructure …
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Machine Learning methods for providing groundwater management insights in semi-arid alluvial aquifers
Accurate regional groundwater level (GWL) forecasting is critical for evaluating the impacts of groundwater withdrawals on water resource sustainability, especially during droughts. A lack of hydrogeological data often makes it challenging to develop water balance models that forecast the impacts …
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An integrated modelling approach for sustainable management of semi-arid and arid rangelands
… sustainable resource management strategies for semi-arid and arid rangelands is acute as non-adapted grazing strategies lead to irreversible environmental problems such as desertification and associated loss of economic support to society. In such vulnerable ecosystems, successful implementation …
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Ecohydrology effects of an invasive grass (Phalaris arundinacea) on semi-arid riparian zones
… of riparian zones along low order streams in a semi-arid region. I conducted vegetation, groundwater, and stream flow surveys at nine sites along four watersheds to determine community composition and hydrologic regime measured the length of the growing season for nine riparian species. I …
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Effects of dynamic vegetation and topography on hydrological processes in semi-arid areas
… dynamics occurring in the complex terrain of a semi-arid area characteristic of central New Mexico. The study constructs a dynamic model of coupled interactions, [tRIBS+VEGGIE], that considers essential water and energy processes over the river basin and links them to the basic plant life …
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The role of rooting strategies on the eco-hydrology of semi-arid regions
Arid regions are characterized by high variability in the arrival of rainfall, and species found in these areas have adapted mechanisms to ensure the capture of this scarce resource. In particular, the rooting strategies employed by vegetation can be critical to their survival. However, land …
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State policy and food insecurity in Kenya's arid and semi-arid land (ASAL) regions
Kenya's arid and semi-arid lands (ASALs) have continued to experience chronic and persistent food crises despite the efforts made by governmental and non-governmental organizations to address the problem. Inappropriate policies and poor approaches have partly been blamed for this persistence. This …
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