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 14 of 14 for “"hydrogeomorphic"”.
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Hydrogeomorphic characterization and classification of Pacific Northwest mountain streams for biomonitoring
… integrate hydrologic and geomorphic (i.e., hydrogeomorphic) typologies and none explicitly describe physical processes and boundary conditions of relevance to stream biotic assemblages. I used a geographical information system (GIS) to describe hydrologic regimes and geomorphic boundary …
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Forest Disturbances: Occurrences and Impacts of Recreational, Hydrogeomorphic, and Climatic Disturbances
… bridged gaps in knowledge of recreational, hydrogeomorphic, and climatic disturbances in forested ecosystems which can be used to develop management strategies.
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Beaver as drivers of hydrogeomorphic and ecological processes in a mountain valley
In aquatic and semi-aquatic environments of North America, beaver (Castor canadensis) affect landscape structure and dynamics at a level rivaled only by humans. The objective of this dissertation is to identify the influence of beaver dams on hydrologic, geomorphic, and ecological processes in a …
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Food webs in the lower Waikato River and the role of hydrogeomorphic complexity
… depending on temporal and spatial variation in hydrogeomorphic conditions. The geographic spread of studies addressing carbon flow in large river food webs is steadily increasing, although information remains sparse on temperate Southern Hemisphere rivers and long-term data sets on carbon flow …
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Small scale hydrogeomorphic features influence macroinvertebrate food webs in two Great Plains rivers
… the years. I analyzed the influence of local hydrogeomorphic variables on the structure and function of food webs in two U.S. Great Plains rivers, the Little Missouri and Niobrara. I used stable isotope analysis to reveal hydrogeomorphic relationships with δ13C in the food web, consumer …
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Multi-scale hydrogeomorphic influences on bull trout spawning habitat in snowmelt-dominated headwater streams
I investigated relationships between geomorphology, hydrogeology, and bull trout (Salvelinus confluentus) redd occurrence and density at multiple spatial scales in gravel-bed, pool-riffle, snowmelt dominated headwater streams of northwestern Montana. Subreach redd occurrence tended to be associated …
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Multi-scale hydrogeomorphic influences on bull trout spawning habitat in snowmelt-dominated headwater streams
I investigated relationships between geomorphology, hydrogeology, and bull trout (Salvelinus confluentus) redd occurrence and density at multiple spatial scales in gravel-bed, pool-riffle, snowmelt dominated headwater streams of northwestern Montana. Subreach redd occurrence tended to be associated …
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Flood Processes, Forest Dynamics, and Disturbance In the Congaree River Floodplain, South Carolina
… complex overland flow processes and quantifying hydrogeomorphic environmental data for use in ecological analysis. The 2D flood model is developed using high resolution terrain data and historical flows. The flood simulation model measures flood extent, depth, frequency and flood water retention …
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Hydrologic Variations Within Created and Natural Wetlands in Southeastern Virginia
… Quaternary aged surfaces with very similar hydrogeomorphic conditions. The Sandy Bottom Nature Park site (SBNP) located in Hampton, VA and rests on the sandy loam Tabb Formation while the Charles City Wetland site (CCW) lies on the older and clay-rich Shirley Formation. This study documents …
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Ecohydrology of Natural and Restored Wetlands in a Glacial Plain
… Corps of Engineers was tasked with developing a hydrogeomorphic assessment approach for wetlands in the various regions throughout the U.S. to facilitate wetland restoration. This effort was redirected in the aftermath of Hurricane Katrina, but the need for assessment tools persists for several …
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A Comparison of Four Wetlands Assessment Procedures Relevant to the Alluvial Valleys of East Texas
… <em>A Regional Guidebook for Applying the Hydrogeomorphic Approach to the Functional Assessment of Forested Wetlands in Alluvial Valleys of East Texas</em> (ETXHGM); <em>Texas Rapid Assessment Method</em> (TXRAM); and the <em>Wildlife Habitat Appraisal Procedure </em>(WHAP). Little previous …
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Ecology and climates of early Middle Pleistocene interglacials in Britain
… processes (herbivore activity, wildfire, hydrogeomorphic processes) in driving and maintaining local vegetation structure and habitat heterogeneity. This is explored further (in Chapter 8), emphasising the apparent importance of site-specific factors, rather than those shared between …
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Evaluation of the Basis and Effectiveness of Habitat Assessments in Wetland Functional Assessment Methods
… Technique (HAT), Rocky Mountain Riparian Hydrogeomorphic (HGM), Southern California Riparian Model, and Reference Wetland assessment methods. The rankings of these site scores were also calculated for each method. Correlation coefficients (r) were calculated between the site scores of the …
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Plant introductions and community dynamics across environmental gradients in Great Lakes coastal wetlands
… no clear trends in the relationships between hydrogeomorphic class and non-native plant prevalence. Higher peak lake level fluctuations were associated with decreased non-native richness and increased non-native relative cover. Damming upstream of wetlands generally predicted increased …