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- Cadmium (1)
- Constructed wetlands -- Environmental aspects (1)
- Floods -- Lower Columbia River (Or. and Wash.) (1)
- Floods -- Oregon -- Willamette River -- Mathematical models (1)
- Green roofs (Gardening) -- Environmental aspects -- Oregon -- Portland (1)
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- Nanoparticles -- Environmental aspects -- Mathematical models (1)
- Sewage -- Purification -- Metals removal (1)
- Stormwater infiltration (1)
- Tides -- Lower Columbia River (Or. and Wash.) -- History (1)
- Tides -- Lower Columbia River (Or. and Wash.) -- Mathematical models (1)
- Titanium dioxide (1)
- Urban runoff -- Oregon -- Portland -- Analysis (1)
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Articles 1 - 3 of 3
Full-Text Articles in Engineering
Flood Dynamics In The Portland Metropolitan Area, Past, Present, And Future, Lumas Terence Helaire
Flood Dynamics In The Portland Metropolitan Area, Past, Present, And Future, Lumas Terence Helaire
Dissertations and Theses
The Portland area has an extensive flood history since it was founded in 1845. In the late 19th century, the Portland area was prone to flooding from snowmelt freshets (3-6 months duration) and brief winter rain or rain-on-snow events. Since that time the magnitude of spring freshets has been curtailed by 45% due to climate change, flow diversions, and reservoir management. Along with changes in hydrology, the bathymetry of the Lower Columbia River has been altered by the dredging of the navigation channel, diking, and land reclamation. To understand how these changes in hydrology and bathymetry have affected tidal and …
Impact Of Titanium Dioxide Nanoparticles On Nutrient And Contaminant Reduction In Wastewater Treatment Wetlands, Madeline Hubbard
Impact Of Titanium Dioxide Nanoparticles On Nutrient And Contaminant Reduction In Wastewater Treatment Wetlands, Madeline Hubbard
Civil and Environmental Engineering Master's Project Reports
Metallic nanoparticles are found in a variety of commercial products and industrial processes, and have become more common in the last few decades. As nanoparticles are toxic to biota and have the potential to spread other types of contamination, their increased use has become a concern. Research into the transport of nanoparticles in subsurface and surface waters shows a wide range in mobility, but that they are most likely to collect in systems with low linear velocities and high organic content. As a result, wetlands are the most vulnerable to nanoparticle contamination. Wetlands receiving and treating wastewater effluent have an …
Water Quality Analysis Of Ecoroof Runoff In Portland, Pranoti P. Deshmukh
Water Quality Analysis Of Ecoroof Runoff In Portland, Pranoti P. Deshmukh
Civil and Environmental Engineering Master's Project Reports
Portland, Oregon is internationally recognized for its implementation of sustainable stormwater management technologies. Ecoroof is one of the sustainable solutions to reduce stormwater runoff which also provides multiple environmental benefits. However, very little is known about the impact of ecoroofs on water quality of roof runoff. Stormwater runoff carries a significant amount of pollutants, which, if it directly enters a stream or river, degrades water quality and severely harms aquatic life.
This study evaluates the trends in the long-term water quality data from ecoroofs and conventional roofs in the Portland area. Mann Kendall trend test was used to detect the …