Dynamic lake water quality model for the evaluation of lake treatment alternatives
A computer model which simulates several water quality parameters in a stratified lake during the main growth season has been developed. The model is process oriented and simulates heat transfer, light penetration, mixing by wind and natural convection, inflow and outflow, settling of particles and several biological and chemical processes related to primary productivity. In the simulation, the lake is subdivided into up to 40 layers of variable thickness. Typically, layer thickness is between 0.5 and 1.0 meters. The timestep of the simulation is one day. Input to the simulation includes daily weather parameters, lake morphometry, inflow rate, and inflow quality. Output consist of daily vertical distribution of water temperature, dissolved oxygen, suspended solids, up to three forms of phytoplankton, up to three forms of phosphorus and two forms of nitrogen. Graphical output is provided in the form of profiles on particular dates or time series plots at particular depths. Application of the model to three Minnesota lakes are presented.
- Research Organization:
- Minnesota Univ., Minneapolis, MN (USA)
- OSTI ID:
- 5408351
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUATIC ORGANISMS
ENVIRONMENTAL QUALITY
FEDERAL REGION V
FLOW RATE
LAKES
MATHEMATICAL MODELS
MINNESOTA
NITRATES
NITROGEN COMPOUNDS
NORTH AMERICA
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHYTOPLANKTON
PLANKTON
POLLUTION
SURFACE WATERS
TEMPERATURE DISTRIBUTION
USA
WATER POLLUTION
WATER QUALITY
WEATHER