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Fosnrs 7: Development of an Analytical Groundwater Model for Fate and Transport of Nitrogen from Onsite Wastewater Systems.
See more from this Division: Oral sessionsSee more from this Session: TRACK 1--Treatment and Fate of Contaminants: Nitrogen
As part of the validation process outputs from the groundwater module have been compared to field data gathered at the GCREC field site in Florida. Groundwater module outputs have also been compared to a MODFLOW model of an OWS and results indicate that the analytical model outputs are in agreement. Output uncertainty analysis has been performed based on a Monte Carlo approach using parameters representative of Florida hydrogeology to gain an understanding of the distribution of model outputs. Critical parameters were identified through a parameter sensitivity analyses to inform users which parameters to adjust from default values. Methods to accurately determine parameter values for the groundwater module have also been proposed and evaluated. Preliminary results from the integrated vadose zone and saturated zone modules indicate that it is a robust and user friendly tool that does not require extensive modeling experience to operate, while still providing outputs that are in line with field observations and industry accepted numerical models. The model provides OWS professionals an opportunity to rapidly evaluate several scenarios in a relatively short time and aids in the selection of nitrogen reduction strategies for OWS in a given watershed.
See more from this Session: TRACK 1--Treatment and Fate of Contaminants: Nitrogen