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.
Results
Showing 1 to 20 of 32 for “"hydrologic regime"”.
-
Hydrologic Regime and Soil Property Interactions in a Forested Peatland
… Peatland function is largely dependent on hydrologic regimes and their influences on the accumulation and properties of peat soil. Therefore, an understanding of soil-hydrology interactions is needed to inform management in drained peatlands, including expansive systems such as the Great …
-
Assessing social-ecological resilience and adaptive capacity in the face of climate change: An examination of three communities in the Crown of the Continent ecosystem
… the impacts of climate change on the ecosystem's hydrologic regime. The Crown of the Continent Ecosystem spans the U.S.-Canadian border; case study communities composed of Kalispell and Choteau, Montana and Fernie, British Columbia fall on both sides of the border.</p><p>Primary data was gathered …
-
Distinguishing the hydrologic regimes and vegetation of fens and wet meadows in the Rocky Mountains
… Organic vs. mineral soil layer classifications, hydrologic regime and vegetation indicators have been used to distinguish fens from wet meadows, but complex interactions between physical and environmental variables can make identifying wetland types challenging. Understanding the differences …
-
QUANTIFYING EFFECTS OF SEASONAL INUNDATION ON METHANE FLUXES FROM FORESTED FRESHWATER WETLANDS
… is unclear how to relate aspects of a wetland’s hydrologic regime to the timing, magnitude, and spatial extent of its methane emissions. Furthermore, discrepancies between the magnitude of global methane emissions calculated using different techniques indicate that current methods for measuring …
-
Bedload Transport in Gravel-Bed Streams under a wide range of Shields Stresses
… for this complication, including the different hydrologic regime under which different stream types operate and the wide range of particle sizes of channel bed material. Based on the hydrologic regime, there are two common types of gravel-bed streams: perennial and ephemeral. In terms of channel …
-
Modeling the potential impacts of climate change on streamflow variability in the North Fork of Elk Creek Experimental Watershed, West-Central, Montana
… the effects of global climate change on the hydrologic regime of West-Central Montana, focusing on the North Fork of Elk Creek, a 6.6 km2 (2.6 mi²) Experimental Watershed. This is important to understand in snowmelt-dominated watersheds, as it is already well documented by current trends and …
-
Modeling the potential impacts of climate change on streamflow variability in the North Fork of Elk Creek Experimental Watershed, West-Central, Montana
… the effects of global climate change on the hydrologic regime of West-Central Montana, focusing on the North Fork of Elk Creek, a 6.6 km2 (2.6 mi²) Experimental Watershed. This is important to understand in snowmelt-dominated watersheds, as it is already well documented by current trends and …
-
Forest Disturbances: Occurrences and Impacts of Recreational, Hydrogeomorphic, and Climatic Disturbances
… water quality below stream crossings. Impacts of hydrologic regime were apparent on sediment deposition and on green ash (Fraxinus pennsylvanica Marsh.) and water tupelo (Nyssa aquatica L.) radial growth along the Tensaw River in southwest Alabama. Annual dendrogeomorphic sediment accretion rates …
-
Spatially variable hydrologic regimes in relation to bog turtle (Glyptemys muhlenbergii) population density
… being typified by precipitation as the major hydrologic input. Groundwater inputs are not only important in taxonomically classifying wetland type, but also contribute in important ways to bog turtle natural history. Bog turtles ectothermically regulate body temperature by utilizing thermally …
-
Performance Evaluation of a Low Impact Development Retrofit for Urban Stormwater Treatment
… (LID) is to mimic the pre-development hydrologic regime of a catchment through infiltration, filtration, storage, evaporation, and detention of post-development runoff using small-scale hydrologic controls close to the source. A LID facility located in Northern Virginia was examined for …
-
How do sand-bed meandering rivers co-construct their own bankfull discharge and bankfull channel geometry? Analytical and numerical study
… rapid widening associated with a changing hydrologic regime. The model, which captures flow variability in terms of the flow duration curve, allows study of the effect of altered hydrologic regime on bankfull discharge and channel characteristics. Here I further examine the importance of …
-
Channel-forming discharge and river meander migration modeling of the Pilcomayo River in the area of Misión La Paz (Argentina) and Pozo Hondo (Paraguay)
… associated with the river's bed material and the hydrologic regime of the stream. In order to better understand the river's morphodynamics, RVR Meander, a 2D depth-averaged analytical model, was used to assess the channel's planform evolution in time. The model uses a single discharge value for …
-
In-Stream Hemlock Twig Breakdown and Effects of Reach-Scale Twig Additions on Appalachian Headwater Streams
… include changes in large wood inputs, changes in hydrologic regime, and increases in rhododendron cover.
-
Lessons learned from urban river restoration projects: application of restoration treatments on the Los Angeles River.
… treatments have been successful at using flow-regime management, to return many ecosystem services to riparian ecosystems. Additional objectives were to compare 1.) costs and 2.) ecosystem service restoration success between eight main on-site and eight off-site alternative treatments …
-
Drivers and Impacts of Smoldering Peat Fires in the Great Dismal Swamp
… results suggest that P. australis is aided by a hydrologic regime generated, in part, from the combined effects of drainage and deep smoldering fires. Our conclusions from these two studies contribute to the scientific understanding of smoldering peat fires and can inform management efforts.
-
Variability and Drivers of Forest Communities at the Great Dismal Swamp
… and ditching) have resulted in altered hydrologic regime, homogenized forest communities, and increased peat subsidence. In response, hydrologic restoration and forest management aim to enhance community composition and function. To help inform these efforts, we investigated variability …
-
An Assessment of Impediments to Low-Impact Development in the Virginia Portion of the Chesapeake Bay Watershed
… both. LID seeks to mimic a site's predevelopment hydrologic regime by retaining and treating stormwater at the lot level using small, cost-effective landscape features.The purpose for this study was to identify and rank impediments to the implementation of LID in the Virginia portion of the …
-
Snowmelt and rainfall runoff in burned and unburned catchments at the intermittent-persistent snow transition, Colorado Front Range
… Front Range, and wildfire can greatly affect the hydrologic regime through which these inputs are delivered to the stream. However, the specific changes to the hydrologic processes that drive runoff production made by wildfire are not clearly understood. This research examines how wildfire affects …
-
Climatic and hydrologic processes leading to recent wetland losses in Yellowstone National Park, USA
… indicators by integrating catchment-scale hydrologic processes. Wetland drying during the past few decades in Yellowstone National Park's Northern Range has caused concern among National Park managers and the public at large. My research was initiated to develop an understanding of the …
-
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 …
Page 1 of 2