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 “"ecohydrology"”.
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Ecohydrology of a seasonal cloud forest in Dhofar
The hydrology of a semiarid broadleaf forest in Dhofar (Oman) is investigated by performing a field experiment and a modeling study. Based on the results of the field experiment, the ecosystem in Dhofar is classified, for the first time, as a seasonal deciduous cloud forest. Owing to the seasonal …
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Ecohydrology and self-organization of black ash wetlands
Wetlands self-organize through reciprocal controls between vegetation and hydrology, but external disturbance may disrupt these feedbacks with consequent changes to ecosystem state. Imminent and widespread emerald ash borer (EAB) infestation throughout North America has raised concern over possible …
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The nitrogen cycle and ecohydrology of seasonally dry grasslands
This thesis addresses the coupling of hydrologic and biogeochemical processes and, specifically, the organization of ecosystem traits with the water, carbon, and nitrogen cycles. Observations from a factorial irrigation-fertilization experiment in a seasonally dry annual grassland are combined with …
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Ecohydrology of Natural and Restored Wetlands in a Glacial Plain
<p>More than half of wetland area in the U.S. have been converted to other land use types for agricultural use and development. Limited understanding of ecological services provided to society by wetlands is another reason for the massive wetland loss in the past. Section 404 of the Clean Water Act …
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Geomorphology and ecohydrology of water-limited ecosystems : a modeling approach
The role of vegetation in shaping landforms and how these landforms respond to disturbances are the subjects of this work. A numerical model is developed to help develop a mechanistic understanding of the hydrological, ecological and geomorphic interactions in water-limited ecosystems. The growth …
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Ecohydrology effects of an invasive grass (Phalaris arundinacea) on semi-arid riparian zones
… key ecological functions that are linked to the ecohydrology however; they are particularly susceptible to invasion by alien species. In much of the western United States, riparian zones are shifting from native woody and herbaceous species to invasive grass dominated ecosystems that may alter …
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Hillslope-scale soil moisture estimation with a physically-based ecohydrology model and L-band microwave remote sensing observations from space
… with an existing spatially distributed ecohydrology model. Application of the EnKF to estimate hillslope-scale soil moisture in a watershed critically depends on: (1) identification of factors contributing to uncertainty in soil moisture, (2) adequate representation of the sources of …
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Satellite-based estimates of net radiation and modeling the role of topography and vegetation on inter-annual hydro-climatology
… of a physically-based, fully distributed ecohydrology model with a numerical atmospheric model, using high performance computing. The ability of the ecohydrology model (in an offline mode) to accurately resolve hydro-climatic signatures and vegetation dynamics is first examined. The …
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Ecologically Based Methods for Multi-Objective Water Resources Management in Taiwan
… requirements can be identified. The Taiwan Ecohydrology Index System (TEIS) has been developed by adding species habitat and ecological needs of fish communities to hydrological statistics to analyze flow requirements. This analysis is then used to develop indicators of an ecological flow …
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Geochemical Approaches to Paleobiology, Paleoclimatology, and Chronostratigraphy of the Cretaceous Cloverly Formation
… Cretaceous nonmarine deposits. I examine the ecohydrology and paleoenvironment of a local Cloverly fossil assemblage by analyzing the 18O of biogenic phosphates from a large set of vertebrate fossils. This has resulted in the first quantitative surface-air temperature estimate (22.3 +/- ~ 5 …
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Linking groundwater level fluctuations and water quality to vegetation and habitat condition in blanket bog ecosystems in Ireland
… some gaps in knowledge related to blanket bog ecohydrology and its influence on ecosystem services to water, through flow and water quality. <br/><br/><br/>This project investigated the link between hydrology and ecology in blanket bog environments on the island of Ireland to help determine …
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Predicting malaria dynamics under climate change
… in malaria incidence rates. Here, a coupled ecohydrology-malaria dynamics model is developed to predict malaria dynamics under projected climate change. The impacts of ecologic acclimation on soil moisture and persistence of ponded water that provide habitat for mosquitoes are captured using …
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Predicting the Downstream Impacts of Headwater Burial in Kemptville Creek Watershed (Ontario) Using the SWAT Model
… highlight the importance of headwater streams to ecohydrology within watersheds and contributes to the understanding of ecosystem response as hydrologic regimes are altered following stream burial.
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Quantifying seasonal snow using very-high-resolution stereo optical satellite images
… This water resource serves multiple roles in ecohydrology, climate modulation, and nutrient cycling. Measuring snow distributions is critical to estimating water storage and to predict melt volumes and timing. Interconnected, multi-scalar processes control snow distributions, and at the …
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Assessment of river-groundwater interactions in the Barotse floodplain, Western Zambia.
… green vegetation. Digital filtering using “EcoHydRology Library” in R statistical package was used to determine the Base Flow Index (BFI) from the hydrograph discharge data collected from the three main gauging stations (Lukulu, Matongo and Senanga) along the Zambezi River. Hydrochemistry …
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Quantifying the Responses of Vegetation to Environmental Stresses
I examined interactions between plants and the environment they live in along the soil-plant-atmospheric continuum and addressed the effects of drought and acid deposition on plant water use. Using a novel stable isotope technique, I showed that plant water source utilization can be modulated in …
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Temporal information partitioning networks to infer ecohydrologic behaviors
"An ecohydrologic system is a complex network, in which the shifting behavior of individual components and the connectivity between them determines the dynamics. This connectivity between components can act to constrain, accentuate, or otherwise modify the variability of individuals. In an …
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Groundwater Dependence of Aquatic Ecosystems associated with the Table Mountain Group Aquifer
Results from this study enables a better understanding of groundwater surface water interactions in the TMG, particularly regarding aquatic ecosystems. It has also highlighted the necessity to do proper impact assessments before proceeding with bulk abstraction from this important aquifer. The …
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