View source for Monitoring:Temperature and DO

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==Model Application: Temperature and Dissolved Oxygen==

===Objective===

In this<ref name="Howington">Howington, Stacy E., 1988 (Aug). "Application of a Two-Dimensional Model of Hydrodynamics and Water Quality (CE-QUAL-W2) to Cordell Hull Reservoir, Tennessee," Technical Report H-88-19, US Army Engineer Waterways Experiment Station, Vicksburg, MS.</ref> study, A CE-QUAL-W2 model was developed to simulate hydrodynamics, temperature, and DO within Cordell Hull Reservoir in Tennessee for a wet, an average, and a dry April through October for the purposes of (a) developing a better understanding of the interactions between stratification and hydrodynamics in this reservoir; (b) evaluating the water quality impacts of proposed submerged weir placement; and (c) evaluating the effects of hydropower operations on reservoir water quality characteristics.
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===Data Needs===
[[Image: CordellHull.jpg |right|thumb|350 px|Cordell Hull Reservoir, Tennessee]]

#''Initial Conditions''
#*<u>Initial Temperature</u>: The entire reservoir was assumed to be homogenous on 1 April of each year simulated
#*<u>Initial DO Concentration</u>: The entire reservoir was assumed to be homogenous on 1 April of each year simulated
#''Boundary Conditions''
#*<u>Meteorology</u>
#*# Solar radiation: Computed using air temperature, cloud cover, dew point temperature, and wind speed on a daily average basis.  Data were obtained from the Meteorological Support Group at Scott Air Force Base, Illinois, for the Nashville Airport weather station.
#*# Coefficient of surface heat exchange: Provided on a daily averaged basis by the Nashville District as computed from the Nashville weather station located at the Nashville Airport which is about 69 km west of the dam.
#*# Equilibrium temperature: Provided on a daily averaged basis by the Nashville District as computed from the Nashville weather station located at the Nashville Airport which is about 69 km west of the dam.
#*# Wind speed and direction
#*<u>Branch Inflows</u>
#*<u>Branch Outflows</u>
#*<u>Inflow Temperatures</u>
#*<u>Inflow DO Concentration</u>
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===Monitoring Needs===

#''In-Pool/In-Situ Data''
#*<u>Temperature profiles</u>: Taken at six different locations
#*<u>Release temperatures</u>
#*<u>DO profiles</u>
#*<u>Release DO concentrations</u> 
#''Water Budget''
#*<u>Daily water surface elevations</u>
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===Reference===
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