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Showing 1 to 19 of 19 for “"Streamwater"”.
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Watershed and Streamside Management Zone Characterization in the Allegheny Plateau of West Virginia
… of forestry Best Management Practices to protect streamwater quality from non-point source pollution resulting from silvicultural operations. However, the exact width and harvest intensity of SMZs that best protects water quality while allowing for commercially valuable timber harvesting has not …
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Hydrochemical Dynamics Under Differing Winter Climate Regimes at the Hubbard Brook Experiment Forest
… ANC recovery. Nitrate concentrations in streamwater during snowmelt decreased more rapidly than the whole-year record. Dissolved organic carbon (DOC) concentrations have declined significantly in most forest floor soil waters, apparently driving a small overall decrease in streamwater DOC …
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In-Stream Reactivity of Dissolved Organic Matter and Nutrients in Proglacial Watersheds
… trends in the physical and chemical signature of streamwater through changing watershed landscapes. Stream metabolism estimates suggested glacial streams receive little DOM from landscape sources and have the potential to function as net autotrophic systems under low flow regimes with unobstructed …
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Tracing the input and evolution of municipal water in springs and tributaries of the Bull Creek watershed, Austin, TX
… sustainability. I examine the geochemistry of streamwater, municipal water, wastewater, soil, and bedrock from the Bull Creek watershed, a rapidly urbanizing watershed in Austin, Texas, to achieve a better understanding of the processes of geochemical evolution as anthropogenically-sourced …
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The impact of harvesting and site preparation on nutrient dynamics, soil erosion and stream water quality in the Virginia Piedmont
… rake-pile, disc. A combination of soil solution, streamwater and soil sampling and a series of soil incubations, both laboratory and <i>in situ</i> monitored changes in the treatment areas following site preparation. Available nitrogen reserves decreased substantially in the shear, pile, disc …
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Natural abundance of ¹⁵N as a tool for assessing patterns of nitrogen loss from forest ecosystems
… watershed will track the rapid changes in streamwater nitrate after clear-cutting. Increased foliar [delta]15 N coincided with increased streamwater nitrate concentration, suggesting that the increased nitrification that caused elevated streamwater nitrate concentration als[delta]caused …
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Understanding Effects of Anthropogenic Activities on Element Cycling in Temperate Forest Watersheds
… results from repeated synoptic surveys of streamwater chemistry for ~30 watersheds spanning one of the largest nitrogen (N) deposition gradients in North America, located within the Great Smoky Mountains National Park. We primarily focus on patterns in dissolved organic matter (DOM) …
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Impact of Isotopic Heterogeneity in Shallow Systems on Modeling of Stormflow Generation
… different sources and hydrologic pathways to streamwater. Isotopic techniques have recently gained widespread acceptance as useful tools in the investigation of sources of stream flow, but considerable debate still surrounds the question of whether the spatial and temporal variations in the …
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Effect of Golf Course Turfgrass Management on Water Quality of Non-tidal Streams in the Chesapeake Bay Watershed
… nitrate-N, ammonium-N, phosphate-phosphorus (P), streamwater temperature, specific conductance (SpC), pH and dissolved oxygen (DO) were sampled at 12-14 golf course stream sites in the James River and Roanoke River watersheds during baseflow conditions. Discharge was determined at outflow …
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NATURALLY ACIDIC OR ANTHROPOGENICALLY ACIDIFIED? UNCOVERING THE DRIVERS OF STREAM ACIDITY DURING STORMFLOW IN THE NEE SOON CATCHMENT, SINGAPORE
… throughfall and shallow groundwater and streamwater samples were analysed. Soil cores were collected for analysis of pH, particle size distribution, organic matter content, effective cation exchange capacity (ECEC) and base saturation (BS). During storm flow, all streams experienced a …
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A Hydropedological Approach to Describing Runoff Generation, Lateral Podzolization, and Spatial and Temporal Patterns of DOC in a Headwater Catchment
… two HPUs in the catchment as sources of streamwater dissolved organic carbon (DOC). While near-stream areas have typically been found to be DOC sources in headwater catchments, the HPUs identified as sources occur at high elevations in the catchment, near channel heads. Overall, these …
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Carbon and nitrogen cycling in watersheds of contrasting vegetation types in the Fernow Experimental Forest, West Virginia
… associated with NO3-N in soil solution and streamwater. In a third study, I performed a soil inoculation and incubation experiment, which utilized soil from both watersheds, mixed in ratios in order to create a gradient of soil chemical and biotic characteristics. Important differences in …
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Nitrogen spiraling in stream ecosystems spanning a gradient of chronic nitrogen loading
… series of short-term nutrient releases in which streamwater NO3-N concentration was incrementally elevated to identify conditions leading to saturation of uptake capacity. Four of six study streams showed signs of N limitation whereas there was no significant change in uptake with increasing …
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Macroinvertebrate Community Response to Spatial Patterns of Water Quality and Habitat within Mining-influenced Headwater Streams of Appalachia
… two of the six streams include channel slope, streamwater nutrients and hardness, stream channel embeddedness, and percent fines comprising the streambed. Redundancy Analysis also indicated 18 key macroinvertebrate taxa in study streams responding to location within stream, habitat, and water …
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Status and remediation of mercury in fish and aquatic ecosystems
… elevated mercury and dissolved organic matter in streamwater draining a limed watershed continued for the three years of my study. This pattern contrasts with streams that received direct channel applications which resulted in much more limited increases lasting only 72 - 96 hours. In these small …
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Episodic Increases In Stream Acidity, Catchment Flow Pathways And Hydrograph Separation
… as a whole suggest that the response of streamwater quality to changes in atmospheric deposition will appear first during periods of high flow. The strength of those conclusions owe much to the integration of observations from a two-dimensional hillslope flow system at Svartberget with …
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Biogeochemical Modeling of the Response of Forest Watersheds in the Northeastern U.S. to Future Climate Change
… and nitrification, and acidification of soil and streamwater. In contrast, the precipitation inputs depicted by ARRM downscaling overcame the risk of drought stress due to greater estimates of precipitation inputs.</p> <p>In phase three of this research, I conducted a cross-site analysis of seven …
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An analysis of solute transport on a harvested hillslope in the southern Appalachian Mountains
… because of potential effects of these solutes on streamwater quality and implications for C sequestration. Additional research will further the understanding about the dynamics of these soil solutes, particularly in response to harvesting of forests. Also, the purported role of riparian buffers, …
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Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest
… prediction of the chemical response of soil and streamwater to cutting disturbance, indicating the important role of plant uptake in regulating the recovery of the forest ecosystem. Simulations for W2 showed more intense NO3- leaching associated with the herbicide treatment resulting in an …