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 81 for “"Baseflow"”.
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Spatial arrangement of stormwater infiltration affects partitioning of subsurface storage and baseflow timing
… between unsaturated and saturated zones, and baseflow response duration and timing. Our findings show that more spatially distributed infiltration facilities, as compared to spatially-clustered infiltration facilities, encourage greater unsaturated zone storage, less saturated zone storage, …
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The characterisation of the hydrodynamic vortex separator using residence time distribution analysis.
… HDVS. The HDVS was operated with and without a baseflow component and with and without the sludge hopper for a range of inlet flow rates and flow splits covering design flow rates for a number of existing applications. The RTD was obtained using a pulse tracer injection method and described …
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A study of the groundwater travel time distribution at a rural watershed in Iowa: A systems theory approach to groundwater flow analysis
… density and incision depth on travel times and baseflow. The marginal impact of tile drainage density on travel times and baseflow volumes was observed to diminish with increasing density, while the impact of tile incision depth on the two variables was observed to be linear. Overall, tile …
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Complementary Effects of In-Stream Structures and Inset Floodplains on Solute Retention
… �We varied hydraulic conditions (winter baseflow, summer baseflow, and storm flow), geology (hydraulic conductivity), and stream restoration design parameters (inset floodplain length, and presence of in stream structures). �In stream structures induced hyporheic exchange during summer …
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Modelling hydrologic system change in a paraglacial catchment in the Northern Rocky Mountains
… change across the basin water balance through baseflow analysis. The research findings indicate catchment scale changes in the timing and magnitude of the flow regime in the deglaciating Swiftcurrent basin, by employing HBV and empirical baseflow analysis. While most components of the water …
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The springshed and potential recharge areas for the Downtown Salado Spring Complex, Salado, Texas.
… study delineated the Salado Springshed under baseflow conditions and identified significant recharge zones by analyzing synoptic water-level maps under different aquifer conditions, collecting groundwater samples for ionic chemistry and isotopic composition analyses, and statistically …
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Assessment of river-groundwater interactions in the Barotse floodplain, Western Zambia.
… locations had occurances of springs. The average baseflow index (BFI) in five hydrological years from October 2004 to September 2009 shows an average of 46.5 percent baseflow to the river flow across the wet and dry season. Furthermore, baseflow averages up to 90 percent of the flow during the dry …
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Thermal Pollution in Urban Streams of the North Carolina Piedmont
… and Palmer 2007, Bernhardt et al. 2008). At baseflow, urban streams are contaminated by sanitary sewage leakages, are unable to exchange water with their floodplains due to incision and with groundwater due to lower water tables, and are warmer due to canopy loss and urban heat island effects …
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Statistical-Based Hydrological Simulation and Inference
… stepwise clustered ensemble (SCE) model); (3) a baseflow-filtered stepwise clustered ensemble (BFSCE)model that helps gain insights towards sub-hydrological processes (i.e., baseflow, overland flow and interflow) in irrigated watersheds; (4) a joint probabilistic rainfall-runoff (JPRR) model that …
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Assessment of the effect of climate change in anticipated water resources availability in arid climate zones
… to overcome the limitations of the traditional baseflow separation methods, and then determine the baseflow annual variations. The water yielded from the basin storage system during the dry seasons resulted in dissimilarities in the observed baseflow index between the pre-damming and …
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Spatial and Temporal Variability of In-Stream Functioning within a Forested, Headwater Piedmont Watershed
… the temporal environmental factors controlling baseflow nitrogen retention are poorly understood, particularly temperature, shading, and dissolved organic matter dynamics. This study therefore attempts to elucidate the effects of these environmental variables on nitrogen cycling within the Fair …
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Effect of Golf Course Turfgrass Management on Water Quality of Non-tidal Streams in the Chesapeake Bay Watershed
… James River and Roanoke River watersheds during baseflow conditions. Discharge was determined at outflow locations. Unit-area loads (UALs) were calculated from monitoring data. These UALs were then compared to UALs from Chesapeake Bay Watershed Model land use acreages and simulated loads for …
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Characterizing Stream-Aquifer Interactions in the Pedernales Watershed in Central Texas
… changes in precipitation, streamflow, baseflow, and hydrologic properties of the Pedernales watershed in central Texas, as well as identify the primary aquifer contributing flow to the Pedernales River between 1940 and 2014. The USGS Ground Water Tool Box RECESS program was used to …
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Impacts of Best Management Practices on Nitrogen Discharge From a Virginia Coastal Plain Watershed
… were used in this study to quantify the surface (baseflow) and ground water lag times and effects of BMPs on N discharge from a Virginia Coastal Plain watershed. Ten-year water quantity/quality data (1986-1996) collected at the Nomini Creek (NC) watershed were used. Field (Field-N) and watershed …
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Assessing the Nonpoint Source Pollutant Removal Efficiencies of a Two-Basin Stormwater Management System in an Urbanizing Watershed
… (dry) pond. These on-stream ponds capture both baseflow and storm runoff from the southern portion of the Virginia Tech campus and surrounding lands, and release the water back to the unnamed stream shortly above its conjunction with Stroubles Creek, a tributary of the New River. Monitoring …
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Low-impact development in the Assabet River Watershed : site hydrologic design and watershed-scal implications
… flooding in rivers and streams, and increased baseflow critical to surface water quality. This thesis investigates two important aspects of any new stormwater management technology: the site level design and large-scale implications. A case study for site-level design is performed in the town …
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Nutrient dynamics in the Lake Manassas (Virginia) watershed
… South Run were higher than from Broad Run under baseflow conditions. On an annual basis, stormflow runoff contributed as much as twelve times the tributary baseflow loading of phosphorus.
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Investigating Subsurface Flow Delivery to a Small High Arctic River
… are dominant controls on the delivery of baseflow, stormflow and solutes to channels in temperate systems. Arctic systems are increasingly being shown to possess similar delivery mechanisms, however the topic is understudied, acutely so in the High Arctic. This work assesses the nature of …
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Impacts to Anadromous Fish through Groundwater Extraction
… Groundwater has historically helped maintain baseflow in the summer and fall low-flow periods and acted as a natural buffer against the regular droughts that occur in California. Today, groundwater provides 30-40% of the state’s water supply, but the pumping in many cases has reduced …
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