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 15 of 15 for “"stream length"”.
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Characterizing and modeling wet stream length dynamics in Appalachian headwaters
Headwater streams change in wet length in response to storm events and seasonal moisture conditions. These low-order channels with temporary flow are pervasive across arid and humid environments yet receive little attention in comparison to perennial waterways. This dissertation examines headwater …
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Part I--Stream length distributions, hillslope effects and other refinements of the geomorphologic IUH ; part II--Topologically random channel networks and Horton's laws : the Howard network simulation model revisited
Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1988.
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Potential beaver colony density in parts of Québec
… colony densities increased with density of stream length between 2% and 6% gradient and amount of wetland broadleaf cover forest area and decreased with forest stand area between 60 and 100 years of age. A set of decision rules was developed to help managers select the best model for …
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Fluvial systems : a re-evaluation of Horton's laws
<p>The number of different order streams entering a channel of known order can be approximated by a geometric progression similar to the Law of Stream Numbers. Hence, the frequency and order of different size tributaries along any channel can be described by a single parameter. Similarly, the …
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Predicting the Downstream Impacts of Headwater Burial in Kemptville Creek Watershed (Ontario) Using the SWAT Model
Headwater streams can compose up to 80% of the total stream length within a watershed but remain most susceptible to stream burial during land use change or management. Rerouting streams into tile drains, canals, non-perforated pipes and paving over, are all examples of stream burial. This study …
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Drainage Timescale Estimates and Storage Change Analysis on A Basin Scale
… unconfined aquifer, such as watershed area, stream length, saturated thickness, aquifer slope, hydrologic conductivity. A satisfactory statistical result and the interpretation are obtained showing the general agreement of the obtained from the recession analysis and the groundwater theory …
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The influence of elevated arsenic concnetrations on stream biota and leaf breakdown in a headwater stream
… may be found at high concentrations. A headwater stream adjacent to an 85 year-old abandoned arsenic mine was investigated to determine the influence of arsenic on stream biota and processes using an upstream (reference) and downstream (mine-influenced) comparative approach. Arsenic concentration …
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Basin-scale spatiotemporal analysis of hydrologic floodplain connectivity
… curves (FDC). Inundation area (normalized to stream length) was found to increase with drainage area, suggesting larger streams have more area available for biogeochemical activity. Annual connectivity increased with drainage area, suggesting larger streams, having higher connectivity, should …
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Case study to document the condition of McConnell creek and the effect of redcedar revetments
… accelerating the natural erosion rates of the stream banks and decreasing water quality. This case study was conducted to document overall creek condition at McConnell Creek in Wichita, Kansas and estimate the effect of streambank stabilization installations. The effects of the revetments were …
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Characterization of dissolved fluvial carbon from landscape characteristics across High Arctic headwater streams
Stream runoff is an important conduit of carbon from the terrestrial ecosystem to the Arctic Ocean, where fluvial carbon is a product of both the source and pathway of the stream network through a watershed. Small headwater streams in the High Arctic are understudied and account for a significant …
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Modeling the temperature response of small rivers to land cover changes using satellite-based spatial data
… which constitute roughly 97% of total global stream length: for such rivers, field collection of temperature data is labor intensive and often covers short time scales, while satellite-based temperature predictions are often inaccurate for smaller rivers. This lack of high-resolution spatial …
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Meltwater stream temperature responses to air temperature and characteristics
… size of glacier catchment area, air temperature, stream characteristics including distance travelled by meltwater in determining water temperature in meltwater rivers draining from Alpine Glaciers. Hood et al, (2013) suggested that percentage glacierisation was the determining influence on water …
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The spatiotemporal dynamics of bacterial and fungal abundance in Great Plains non-perennial streams
Non-perennial streams comprise approximately 50% of global stream length and 59% across the continental U.S. Non-perennial streams are also predicted to become more common, since increased length and time of drying in rivers and streams is a widespread symptom of climate change. These substantial …
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Development of monitoring methods for crayfish populations
… assessing the community structure and health of stream fisheries, freshwater mussels, and insects have been used for several decades. However, such methods are woefully lacking for crayfish. The research of this project involved evaluation of several methods for assessing crayfish populations. …
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Banking on offsets: a political ecological and eco-geomorphic analysis of Section 404 compensatory stream mitigation banking in Illinois and Missouri
… to the dredging and filling of jurisdictional streams and wetlands nationally. Section 404 oversight is triggered when an applicant—such as a land or highway developer—proposes to fill or dredge a stream or wetland as a part of their development project. As a part of their project, the …