CE-QUAL-W2 Legacy Roundtable

CE-QUAL-W2 Legacy Roundtable Summary

Scott Wells' Caretaking List and Model Wishlist

Basic CE-QUAL-W2 Model ‘Caretaking’

Bug list – fix update – mechanism for review
Mechanism for dissemination of code and review of code changes
Model maintenance support mechanism
Model updates – to make model easier to use

• Change I and K to RiverMile/RiverKM and Elevation, m
• Remove dummy segments
• Simplify input files: LPR, VPR, external head BC temp and water quality, bathymetry file

River Model Enhancements

• Initial flow for model simulation
• Trapezoidal geometry of vertical layers
• Initial water surface calculation for model start

Hyporheic Flow
Channel Bottom Heating
Fish Bioenergetics Modeling + Fish “smart particle” movement + particle transport
Bio-energetics approach
Fish Bioenergetics Model

• Parameters are a function of
  • size, age (allometry)
  • temperature
  • energy densities (predator, prey)
  • feeding duration, handling time
  • activity levels (swimming)
• Consumption has prey availability component

Daily fish growth potential

• For 30 minute timesteps:
  • Inputs are updated: temperature, stomach capacity, predator and prey distributions, feeding status, swimming speed & activity
  • Parameters are calculated
• Daily:
  • growth is calculated from sum of the parameter values and mass is updated (Growth is calculated per cell, but is a function of starting mass)

Fish-Particle Transport Model

• Random particle movement
• Passive transport
• Settling velocity
• Fish behavior movement

Improvements in nutrient, algae, macrophyte algorithms

• Variable algae stoichiometry of N, P, C
• Floating macrophytes
• Track P on Inorganic SS allowing desorption
• Add NH3/NH4+ as derived variables

W3

• 3D Version
  
  

W2 Wish List of Additional Enhancements

PC version enhancements

• 3rd party animation and visual tools for PC exe
• Multiple processor parallel version
• Need new PC compiler for exe release

Pre processor enhancements

• Enhanced checks

Post-processing
Linux/Unix version

• Multiple processor/parallel version

Source enhancements

• Code optimization
• Recovery from numerical instabilities
• Particulate inorganic P – new state variable
• Redo boundary segment numbering scheme
• River model
  • Ice cover in rivers
• Turbulence algorithm
  • Refine k-e
  • Add k-l model
  • Reynold’s analogy – eddy viscosity-eddy diffusivity a f(stability)
• Implement simultaneous equation solver in release code
• Sediment diagenesis
• Sediment transport/dynamic bathymetry
• Toxics
• Shading algorithm –simplify data requirements