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Middle Fork Project Flow and Temperature Modeling (Status
Report)
September 9, 2008 Agenda 9:00 AM - 12:00 PM 12:00 PM
Introductions
Status Report/Discussion of Water Temperature Modeling Reservoir
Models Tunnel Models River Models Data Schedule and Key Decisions
12:00 PM Adjourn Principal Project Tasks
Model Implementation/Construction Reservoirs (complete) Rivers (in
progress) Tunnel (complete) Model Calibration Reservoirs French
Meadows Hell Hole Ralston Rivers (pending) Tunnel model calibration
(in progress) Other Tasks field visits model refinement Technology
transfer Model Implementation and Construction
Reservoir model implementation (CE-QUAL-W2): previously presented
River model implementation Geometry (complete) Flow (daily flow
complete, peaking flows in progress) Temperature (boundary
condition and calibration data largely complete) Meteorology
(complete) Tunnel model Field data has been collected Calibration
River Models: Geometry
X-Y description (complete) Profile (Z) description (complete) Cross
section form (in progress) X-Y-Z River Representation: MF X-Y-Z
River Representation: Rubicon Reservoir Model Calibration
Flow: explicitly defined in model, i.e., user specifies inflow and
outflow Stage: measured vs. simulated Water Temperature: measured
vs. simulated profile measured vs. simulated outflow temperature
French Meadows and Hell Hole preliminary results Ralston in
progress (pending river model results) Reservoir Outflow French
Meadows Hell Hole Reservoir Stage French Meadows Hell Hole Water
Temperature Models started under isothermal conditions in January
(largely insensitive to initial temperature condition) Vertical
profiles available for summer months: 2006 and 2007 Two locations:
near dam and near tunnel intake (mid-reservoir profiles not
available at all times) French Meadows Reservoir at Dam (2006)
French Meadows Reservoir at Tunnel Intake (2006) Hell Hole
Reservoir at Dam (2006)
No data at mid-reservoir in 2006 Tunnels Tunnels in the project
area - review
General Tunnel information Tunnel Specifications As built drawings
Field data Tunnel Statistics Recent Tunnel Temperature Data Tunnel
Model - Updates Model Element: Tunnels Tunnels Tunnels are
generally unlined and horseshoe shaped.Some sections are piped, and
other sections have various shapes of concrete liners Overbreak
(e.g., excess excavation for car passes may add to tunnel volume)
Tunnel Statistics Tunnel Volume Length Flow Velocity Travel Time
Time*
(ft^3) (ft) (cfs) (ft/s) (min) 1. Duncan n/a 7,700 400 TBD 2.
Middle Fork 8,124,000 55,105 900 6.1 150 165 135 3. French Meadows
1,713,000 13,681 3.2 71 79 64 4. Ralston 5,840,500 35,397 5.5 108
119 97 * Travel time at +10 % volume ** Travel time at -10% volume
TBD to be determined for Duncan Tunnel as open channel flow Tunnel
Temperature Data: August 2008
French Meadows to Hell Hole Interbay to Ralston Tunnel Model Where,
t = time step (sec)
Ts = Outside/rock temperature (oC) D= Diameter (m) Cp = Specific
heat of water (J kg-1 oC-1) = density of water (kg m-3) h = Heat
exchange coefficient (Wm-2 oC-1) n = time temperature profile along
the tunnel with time a = calibration coefficient ( unitless )
Where, k = thermal conductivity of water (Wm-1 oC-1) R = hydraulic
radius (m) Re = Reynolds number Pr = Prandtl number b = calibration
coefficient (unitless) Other Tasks Field Visits Reservoir model
refinement
River model calibration Tunnel model calibration Technology
transfer Technology Transfer CE-QUAL-W2: model introduction Model
input files
Control file Flow input Temperature input Model Output files
CE-QUAL-W2 Compaq Array Viewer AGPM Model Framework -
Reservoirs
Input Control: Model Parameters (W2-con.npt) Reservoir Model
CE-QUAL-W2 Input Data: Geometry Flow Temperature Meteorology Other
Software: Compaq Array Viewer Model Output: Flow Temperature AGPM
Post-Processing Processes Output: Animation Profile Time Series
Comparison with field data Other CE-QUAL-W2 Public Domain Version
3.2 Supported by PSU and US ACOE
2-dimensional reservoir model (vertical and longitudinal
representation) Software Requirements (Compaq) CE-QUAL-W2 Input
Files Control File: logic control, model parameters, I/O control,
initial conditions, etc. Bathymetry Flow input (reservoir inflow
and reservoir outflow): Time series Temperature of inflows: Time
series CE-QUAL-W2 Output Files
Warning files Reservoir outflow Reservoir outflow temperatures
(mass balance) Other summary files CE-QUAL-W2 File Structure
Fixed format flat files Input files must reside in same directory
as executable Output files are written to same directory File
management is important AGPM The Animation and Graphics Portfolio
Manager (AGPM)
Version 3.5 for Windows XP/Me/2K/9x/NT4 (32-bit) I Post-processing
software for graphically displaying results of two-dimensional
reservoir water quality models such as CE-QUAL-W2 (as well as
BETTER, and WASP). Allows the modeler build a series of plots using
a Windows interface for one simulation, and then efficiently
reproduce all the same plots for a subsequent simulation. The
portfolio concept dramatically reduces the time and expense of
plotting multi-constituent model results and shortening calibration
times Profiles Animation (Screen Captures) Dam Release Temperatures
Time Depth Plots Hands On Application