Event Title

Two-zone Solute and Temperature Transport Model Formulation, Data Collection, and Calibration for Quantifying Hyphorheic Interaction

Presenter Information

Bethany T. Neilson

Location

ECC 307/309

Event Website

http://water.usu.edu/htm/conference/past-spring-runoff-conferences

Start Date

5-4-2007 11:30 AM

End Date

5-4-2007 11:50 AM

Description

The mechanisms of transient storage of solutes in rivers have typically been approximated using a one zone modeling approach that provides a lumped characterization of the surface and subsurface storage. Other investigators have stressed the importance of determining the volume and rate of exchange for instream storage and hyporheic storage with the main channel separately. The key concern with multi-zone model development is the need to estimate parameters associated with exchange processes in each zone. A two-zone temperature and solute model representing characteristics of both the surface and subsurface storage was developed. Additionally, tracer and temperature data were collected in the Virgin River, Utah (USA) to provide independent information for parameter estimation within each storage zone. Due to the large number of calibration parameters associated with two-zone modeling and the calibration time series representing different characteristics of the system, the two zone model was coupled with a multiobjective automatic calibration algorithm, Multiobjective Shuffled Complex Evolution Metropolis (MOSCEM) to assist in parameter estimation. Preliminary two-zone model calibration results using different types of data (solute concentration and temperature data) and data from different locations (main channel and dead zone concentrations or hyporheic temperatures) will be presented.

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Apr 5th, 11:30 AM Apr 5th, 11:50 AM

Two-zone Solute and Temperature Transport Model Formulation, Data Collection, and Calibration for Quantifying Hyphorheic Interaction

ECC 307/309

The mechanisms of transient storage of solutes in rivers have typically been approximated using a one zone modeling approach that provides a lumped characterization of the surface and subsurface storage. Other investigators have stressed the importance of determining the volume and rate of exchange for instream storage and hyporheic storage with the main channel separately. The key concern with multi-zone model development is the need to estimate parameters associated with exchange processes in each zone. A two-zone temperature and solute model representing characteristics of both the surface and subsurface storage was developed. Additionally, tracer and temperature data were collected in the Virgin River, Utah (USA) to provide independent information for parameter estimation within each storage zone. Due to the large number of calibration parameters associated with two-zone modeling and the calibration time series representing different characteristics of the system, the two zone model was coupled with a multiobjective automatic calibration algorithm, Multiobjective Shuffled Complex Evolution Metropolis (MOSCEM) to assist in parameter estimation. Preliminary two-zone model calibration results using different types of data (solute concentration and temperature data) and data from different locations (main channel and dead zone concentrations or hyporheic temperatures) will be presented.

http://digitalcommons.usu.edu/runoff/2007/AllAbstracts/8