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Full-Text Articles in Physical Sciences and Mathematics
Effects Of Beaver Dams On Urban Stream Hydraulic Response During Storm Events, Erin Poor
Effects Of Beaver Dams On Urban Stream Hydraulic Response During Storm Events, Erin Poor
Environmental Science and Management Professional Master's Project Reports
Urbanization of landscapes alters watershed hydrology, leading to changes in the natural flow regime of local streams. Runoff from impervious surfaces and routing of stormwater can cause a rapid increase in the volume and velocity of streamflow. This is observed in the hydrograph as a steep rising limb, followed by a high peak, and a rapid falling limb. This rapidly varying streamflow, often referred to as flashiness, can increase erosive forces on the channel bed and banks, leading to channel incision and bank erosion. In areas where the hydrologic regime is less impacted by humans, beaver dams and ponds attenuate …
Development Of An Effective Shade Model For Water Quality Management In Oregon, Erin Costello
Development Of An Effective Shade Model For Water Quality Management In Oregon, Erin Costello
Environmental Science and Management Professional Master's Project Reports
Warming stream temperatures degrade water quality by stressing cold-water species, promoting harmful algal blooms, lowering dissolved oxygen, and increasing the toxicity of some compounds. The influence of stream temperature on the survival of native salmon is of particular concern in the Pacific Northwest. Effective shade, the fraction of solar radiation blocked from reaching a stream, is directly related to in-stream temperature and can be manipulated by riparian management actions. Mechanistic models of effective shade are prohibitively data and cost intensive. The objective of this research was to develop an empirical model (Simple Shade) for evaluating effective shade across the state …