Estimating groundwater exchange with lakes. 2. Calibration of a three-dimensional, solute transport model to a stable isotope plume
- Geological Survey, Madison, WI (USA)
- Univ. of Wisconsin, Madison (USA)
A three-dimensional groundwater flow and solute transport model was calibrated to a plume of water described by measurements of {delta}{sup 18}O and used to calculate groundwater inflow and outflow rates at a lake in northern Wisconsin. The flow model was calibrated to observed hydraulic gradients and estimated recharge rates. Calibration of the solute transport submodel to the configuration of a stable isotope ({sup 18}O) plume in the contiguous aquifer on the downgradient side of the lake provides additional data to constrain the model. A good match between observed and simulated temporal variations in plume configurations indicates that the model closely simulated the dynamic of the real system. The model provides information on natural variations of rates of groundwater inflow, lake water outflow, and recharge to the water table. Inflow and outflow estimates compare favorably with estimates derived by the isotope mass balance method. Model simulations agree with field observations that show groundwater inflow rates are more sensitive to seasonal variations in recharge than outflow.
- OSTI ID:
- 5607300
- Journal Information:
- Water Resources Research; (USA), Journal Name: Water Resources Research; (USA) Vol. 26:10; ISSN 0043-1397; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
DEVELOPED COUNTRIES
EVEN-EVEN NUCLEI
FEDERAL REGION V
GROUND WATER
HYDROGEN COMPOUNDS
HYDROLOGY
ISOTOPES
LAKES
LIGHT NUCLEI
MATHEMATICAL MODELS
NORTH AMERICA
NUCLEI
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PLUMES
SOLUTES
STABLE ISOTOPES
SURFACE WATERS
USA
WATER
WISCONSIN