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Full-Text Articles in Engineering
Modeling Streambed Heating In Shallow Streams, Robert Leslie Annear Jr.
Modeling Streambed Heating In Shallow Streams, Robert Leslie Annear Jr.
Dissertations and Theses
The Oregon Department of Environmental Quality is developing Total Maximum Daily Loads to address water quality concerns and threatened and endangered species habitat requirements. Approximately 940 water body segments are listed as water quality limited for temperature in Oregon. CE-QUAL-W2 Version 3 is a two-dimensional water quality and hydrodynamic model capable of modeling rivers, reservoirs and estuaries. An important aspect of modeling stream temperature is handling the short-wave solar radiation that penetrates the water surface and impacts the streambed, which can affect water temperatures under low-flow conditions. The Bull Run River-Reservoir system is a 264 km2 watershed 42 km east …
Reversion Of Poly-Phosphates To Ortho-Phosphates In Water Distribution Systems, Avinash Shekhar
Reversion Of Poly-Phosphates To Ortho-Phosphates In Water Distribution Systems, Avinash Shekhar
Electronic Theses and Dissertations
Orthophosphates and polyphosphates are rarely present at significant levels in raw water source but are purposefully added to the water in various forms to inhibit corrosion, iron oxidation (red water), or calcium carbonate precipitation (scale formation). Orthophosphates serve as building blocks for polyphosphates, which includes structures in linear chain, branched chains (metaphosphate) and "glassy" polyphosphate polymers. The advantage of polyphosphates over ortho phosphates lies in the fact that they slowly revert to orthophosphates and thus provide corrosion inhibition action over longer period of time in distribution systems. A study was completed for Tampa Bay Water on water distribution systems in …