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Comprehensive Modeling and Performance Monitoring of Constructed Wetlands in Arid Climates

This project focuses on the Hemet/San Jacinto Water Treatment Facility, managed by Eastern Municipal Water District in Riverside County. Aimed at educational purposes and wildlife habitat enhancement, the study monitors key environmental parameters and models critical processes in wetlands. The comprehensive computer program developed includes sensitivity analysis to identify essential processes for robust planning of constructed wetlands in arid regions. Parameters like temperature, nitrogen, and phosphorus levels are monitored to optimize water treatment and ecological benefits.

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Comprehensive Modeling and Performance Monitoring of Constructed Wetlands in Arid Climates

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  1. Wetlands Treatment Modeling David Crohn, Andrew Chang, Nels Ruud Department of Soil and Environmental Sciences University of California, Riverside

  2. The Site • Located at Hemet/San Jacinto Water Treatment Facility • Managed by Eastern Municipal Water District of Riverside County • Financed by EMWD and the Bureau of Reclamation

  3. The Site • Multipurpose • education • wildlife habitat • water finishing • Completely constructed • Three phase design

  4. The Project • Monitor the performance of the EMWD • Identify and monitor key parameters • Model key processes • Develop comprehensive computer program • Sensitivity analysis • Eliminate less important processes • Develop simpler, more robust, planning tool for designing constructed wetlands in arid climates

  5. Parameters • Temperature • Solar radiation • Wind speed • Inflow and outflow • Depth • Nitrogen (organic, ammonium, nitrate) • Phosphate

  6. The Site

  7. Tracer Study Design ••••• ••••• ••••• ••••• • • • • • • • • ••••• ••••• ••••• ••••• ••••• • • • •

  8. Sample Collection

  9. 3 Phase System

  10. Inlets

  11. Outlet

  12. Outlets

  13. h: water surface (L) hg: ground surface (L) x: distance from influent weir (L) W: channel width (L) n: channel porosity (L3/L3) , : hydraulic friction coefficients P: precipitation rate (L/T) E: evapotranspiration rate (L/T) Advection-Diffusion Processes

  14. Channel 1

  15. Channel 2

  16. Channel 3

  17. Channel 4

  18. Border

  19. SolarRadiation Influent (Treatment Plant [& Stormwater]) Precipitation EmergencySpillway Evapo-transpiration Outflow(TreatedWater) Water Column Soil Water Impeding Layer DeepPercolation Water Cycle

  20. Influent (Treatment Plant [& Stormwater]) SolarRadiation SuspendedSolids &Particulates WaterTemp. Plankton& Algae Macro-phytes DissolvedCompounds Outflow(TreatedWater) Water Column Sediments Energy Cycle

  21. Influent (Treatment Plant [& Stormwater]) Atmospheric Carbon(carbon dioxide or methane) SolarRadiation Dissolved Recalcitrant Carbon Dissolved Labile Organic Carbon WaterTemp. Plankton& Algae Macro-phytes Suspended Recalcitrant Carbon SuspendedLabile Organic Carbon Outflow(TreatedWater) Denitrification Water Column Sediments Oxygen Cycle

  22. Influent (Treatment Plant [& Stormwater]) Avian wastes SolarRadiation Atmospheric Carbon dioxide Dissolved Labile Carbon WaterTemp. Plankton& Algae Macro-phytes SuspendedLabile Carbon Solution Oxygen Outflow(TreatedWater) Nitrification Water Column Sediments Carbon Cycle

  23. Influent (Treatment Plant [& Stormwater]) SolarRadiation Avian wastes SuspendedSolids &ParticulatePhosphorus WaterTemp. Plankton& Algae Macro-phytes DissolvedPhosphorus Outflow(TreatedWater) Water Column Sediments Phosphorus Cycle

  24. Avian wastes Ammonia Denitri-fication Precipitation Influent (Treatment Plant [& Stormwater]) SolarRadiation Fixation OrganicNitrogen inSuspendedSolids WaterTemp. Plankton& Algae Macro-phytes DissolvedAmmonium nitrification Outflow(TreatedWater) DissolvedNitrate Water Column Sediments Nitrogen Cycle

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