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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 11 of 11 for “"hydric soils"”.
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Loblolly pine response to drainage and fertilization of hydric soils
Loblolly pine (<i>Pinus taeda</i>) productivity on wet flats of the lower coastal plain of Virginia is largely affected by the presence of high water tables and infertile soil. Site preparation by bedding and ditching can alleviate high water tables and increase aerated soil rooting volume, …
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Exploring the Utility of High Resolution Imagery for Determining Wetland Signatures
… creating anaerobic conditions that generate hydric soils and support hydrophytic vegetation. Wetland habitats provide important ecological functions including breeding grounds for fish, other wildlife, water purification, reduction in flooding, species diversity, recreation, food production, …
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Environmental and Digital Data Analysis of the National Wetlands Inventory (NWI) Landscape Position Classification System
… properties with public domain terrain, soils, hydrology, and vegetation data within the Coastal Plain of Virginia. Environmental properties were applied to a non-metric multidimensional scaling technique to identify similarities within individual landscape positions based on wetland …
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Using Digital Methods to Reconstruct Original Topography and Landscape Wetness in the Judicial Ditch 66 Watershed, Polk County, Minnesota
… if the areas of wetness correspond with hydric soils. </p><p>GIS software provides helpful tools, which can produce models that can simultaneously show multiple layers of information for an area. By estimating areas of wetness, this method allows the effects of restoration to be …
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Determining an Appropriate Organic Matter Loading Rate for a Created Coastal Plain Forested Wetland
… in soil organic matter than native forested hydric soils. However, optimal loading rates for created wetland soil reconstruction have not been rigorously established. Our objective was to determine appropriate organic amendment loading rates for a Coastal Plain mitigation wetland based on 1) …
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Assessing recharge and discharge across the prairie pothole landscape: application of spatial hydrological data and statistical analysis in a groundwater flow model
… spatial distribution of observed wetlands and hydric soils. Within the watershed, recharge and discharge zones were mapped, the configuration of the water table was estimated, and areas with a shallow water table identified. Model output was found to be strongly controlled by the initial …
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Climatic and hydrologic processes leading to recent wetland losses in Yellowstone National Park, USA
… I integrated analyses of hydrology, climate, soils, and vegetation. In 2009 I selected 24 study wetlands and instrumented each with an average of five shallow groundwater monitoring well-and-piezometer nests. To quantify historic wetland area I mapped hydric soils, analyzed aerial photographs, …
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An Analysis of Palustrine Mitigation Wetlands in the Virginia Coastal Plain
… significantly over the five-year study period. Soils in the mitigation area were more uniform and considerably less differentiated when compared to those of the reference area. Testing for Fe(II) with alpha-alpha, dipyridyl dye solution produced mixed results, obtaining both positive and …
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Physical and Chemical Soil Properties of Ten Virginia Department of Transportation (VDOT) Mitigation Wetlands
… soil reconstruction practices on mitigation site soils, (ii) to assess the degree to which hydric soil indicators were present, and (iii) to evaluate the relative edaphic potential of mitigation site soils. Soil physical, chemical and morphological properties were analyzed in ten mitigation …
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Wetland hydrology and soils as components of Virginia bog turtle (Glyptemys muhlenbergii) habitat
… and temporally characterize the hydrology and soils of wetlands that are used by bog turtles in an effort to determine how these factors are related to the species' habitat requirements, movement, and activity. In Chapter 1, I evaluated hydrology over a continuous 28-month period using shallow …
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Vernal Pool Mapping and Geomorphology in the Appalachian Mountains of Pennsylvania
Vernal pools are small seasonally-ponded wetlands that provide crucial habitat for amphibian reproduction and support trophic levels beyond their boundaries. The Ridge and Valley physiographic province in Pennsylvania is known to have vernal pools, but a regional inventory and geomorphology …