Monitoring:Temperature

Modeling Application: Temperature

Objectives

Laurance Lake is located in Hood River County, OR

In 2005, a hydrodynamic and temperature model was developed with CE-QUAL-W2 for Laurance Lake in Hood River County, Oregon. The reservoir empties into the Middle Fork of the Hood River, and since Hood River currently violates temperature standards, a hydrodynamic and temperature CE-QUAL-W2 model was developed to assess strategies for improving temperatures in the Middle Fork River.

The objectives of this study were defined as:

• Develop a hydrodynamic and temperature model of Laurance Lake
• Calibrate the model to field data collected from November 2002 through Spring 2004
• Use the model to evaluate strategies for temperature improvement through operational or structural changes to Lake Laurance
  
  

Data Needs

1. Geometry Data
   • Lake bathymetry: Bathymetry was developed using depth soundings, a USGS digital elevation map (DEM), and a bathymetric contour map provided by the Middle Fork Irrigation District.
2. Initial Conditions
   • Initial Temperature: A single vertical profile was used for the initial temperature
3. Boundary Conditions
   • Meteorological data: Meteorological data was measured at the dam and at an agrimet station located in a nearby city.
   • Daily outflows: The outflow file was developed from data provided by the Middle Fork Irrigation District (MFID)
   • Daily inflows: Inflows were based on gaging station data. Where gaging data was not available, a regression equation was used.
   • Inflow temperatures: Inflow temperatures were measured directly.

Monitoring Needs

1. In-Pool/In-Situ Data
   • Vertical temperature profiles: Temperature probes located along the dam were measured continuously over the simulation period.
2. Water Budget
   • Daily water level at upstream system boundary