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 15 of 15 for “"hydrologic connectivity"”.
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Evaluating Floodplain Hydrologic Connectivity, Yakima River, WA
… baseline data to determine if and how floodplain connectivity affects water quality and quantity in side-channel habitat on the Yakima River. This research compared seasonal differences in habitat quality between connected and disconnected channels by evaluating bi-weekly measurements of surface …
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Assessing Hydrologic Connectivity using Water Temperature, Wax Lake Delta, Louisiana
… the advective factors that contribute to the hydrologic connectivity between a primary distributary channel and interdistributary island on the Wax Lake Delta of coastal Louisiana. We deployed a relatively inexpensive, open-source data logging platform to collect high quality continuous water …
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Soil-derived dissolved organic matter cycling at terrestrial-aquatic interfaces: Implications for wetland-dominated landscapes, stormwater control measures, and drinking water supply
… Water movement across TAIs, known as hydrologic connectivity, mediates the transport and transformation of biogeochemically significant substrates, such as carbon and nutrients. Dissolved organic matter (DOM) is a soluble and reactive form of carbon comprised of organic molecules …
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Dissolved Organic Matter Sources from Soil Horizons with Varying Hydrology and Distance from Wetland Edge
Understanding hydrologic controls on carbon accumulation and export within geographically isolated wetlands (GIW) has implications for the success of wetland restoration efforts intended to produce carbon sinks. However, little is known about how hydrologic connectivity along the …
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Causes and consequences of soil carbon mobilization and lake brownification in northern forested landscapes
… Increased temperatures and changes in hydrologic connectivity interacted with catchment topography to modulate the timing, magnitude, and fate of soil carbon export. Increased temperatures led to hydrologic disconnectivity that favoured export of soil carbon from carbon-rich wetlands to …
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Effects of Hydrological Connectivity on the Benthos of a Large River (Lower Mississippi River, USA)
The effects of hydrological connectivity between the Mississippi River main channel and adjacent secondary channel and floodplain habitats on macroinvertebrate community structure, water chemistry, and sediment makeup and chemistry are analyzed. In river-floodplain systems, connectivity between the …
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Connectivity dynamics and its impact on material flux and transformations in a watershed
Connectivity of a landscape is recognized in hydrology, ecology, and geomorphology as an important driver of resource redistribution within and between catchments. Catchment hydrologic connectivity can be described as the emergent property of a system resulting from the interaction of its inherent …
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Monitoring and Managing River Corridors in the Midst of Growing Water Demand
… adjacent floodplains. The importance of this hydrologic connectivity between rivers and floodplains has been emphasized in recent decades and now ecological engineering techniques such as stream restoration are often utilized to restore connectivity between streams and their riparian …
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Cumulative Impacts of Stream Restoration on Watershed-Scale Flood Attenuation, Floodplain Inundation, and Nitrate Removal
… removal rates associated with spatial, temporal, hydrologic, and restoration features. Our results showed that hydrologic conditions were the most important variable for predicting actual nitrate removal rates. Overall, both studies demonstrate the importance of hydrologic connectivity for flood …
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Surface Water and Groundwater Hydraulics, Exchange, and Transport During Simulated Overbank Floods Along a Third-Order Stream in Southwest Virginia
Restoring hydrologic connectivity between the channel and floodplain is a common practice in stream and river restoration. Floodplain hydrology and hydrogeology impact biogeochemical processing and potential nutrient removal, yet rigorous field evaluations of surface and groundwater flows during …
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Catchment Structure Regulates Hydrodynamic Drivers of Chemical Weathering in Shallow Forest Soils
… along flow paths is challenging. While hydrologic regime and soil solution acidity are known to influence weathering rates and soil transformation processes, an integrated understanding of these factors together is still lacking. This dissertation explores the effects of subsurface flow …
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Control by Vegetation Disturbance on Gully Rejuvenation Following Wildfire
… due to wildfire leads to critical thresholds of hydrologic connectivity after which runoff and erosion accelerate. The source area analysis suggests that forces of convergent flow are not fully expressed until a significant proportion of vegetation has been consumed such that flow resistance is …
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Control by Vegetation Disturbance on Gully Rejuvenation Following Wildfire
… due to wildfire leads to critical thresholds of hydrologic connectivity after which runoff and erosion accelerate. The source area analysis suggests that forces of convergent flow are not fully expressed until a significant proportion of vegetation has been consumed such that flow resistance is …
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Tracing carbon flows through Arctic and alpine watersheds
… from soils to the atmosphere and transform the hydrological routing of water and DOM across Arctic landscapes. We traced the mobilization potential of DOM at two landscape positions (hillslope and riparian) and from two soil horizons (organic and mineral) using bromide, and characterized the …
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Ecohydrology of Natural and Restored Wetlands in a Glacial Plain
… natural wetlands. Considering that unexpected ecohydrologic behaviors such as drought have been reported as a main cause of unsuccessful restoration over the U.S., understanding and quantifying water movement within the local seeing is imperative to future wetland restoration. </p> <p>From an …