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The goal = “No Bad Water” TMDL Intro S.W.Q. and BASINS 2.0 Model Application(s)

Presentation Outline. The goal = “No Bad Water” TMDL Intro S.W.Q. and BASINS 2.0 Model Application(s) Model Limitations Future Work. TMDL s - T otal M aximum D aily L oads.  Maximum daily pollutant load to a waterbody while

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The goal = “No Bad Water” TMDL Intro S.W.Q. and BASINS 2.0 Model Application(s)

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  1. Presentation Outline • The goal = “No Bad Water” • TMDL Intro • S.W.Q. and BASINS 2.0 • Model Application(s) • Model Limitations • Future Work

  2. TMDLs - Total Maximum Daily Loads  Maximum daily pollutant load to a waterbody while still meeting all applicable state water quality standards Standard TMDL Used = (TMDL Actual) x (Safety Factor) Concentration TMDL Actual = (Standard) x (Waterbody Volume) Daily Load TMDL Actual TMDL Used  Section 303(d)1 of 1987 Clean Water Act - Mandates TMDLs  Texas Natural Resource Conservation Comission (TNRCC)

  3. Surface Water Quality and BASINS 2.0 • EPA Program - HSPF • Supports modeling: • Non-point sources • Permitted discharges • Hypothetical discharges • Land use changes • EPA Database • Total US coverage • Site specific data

  4. BASINS 2.0 TMDL Model Applications TNRCC Group C – Study Area

  5. BASINS 2.0 TMDL Model Applications Study Area Rivers + Waterbodies

  6. BASINS 2.0 TMDL Model Applications TNRCC FY99 TMDL Segments

  7. BASINS 2.0 TMDL Model Applications Delineated Watersheds for Segments

  8. BASINS 2.0 TMDL Model Applications Run NPSM on selected Watersheds

  9. BASINS 2.0 TMDL Model Applications Initial Results (mythical) Results after input Modification (mythical)

  10. BASINS 2.0 TMDL Model Applications NEW TMDL

  11. BASINS 2.0 TMDL Model Limitations • NPSM is Mysterious!! • We are not yet BASINS masters • NPSM does not model lakes/reservoirs • BASINS 2.0 – No grids • Import watersheds derived w/ CRWR PRE-PRO or • Hand delineate watersheds (accuracy? repeatability?) • Model Calibration – • Does output compare w/ field measurements? • Site specific data

  12. Future Work (i.e. Project + Master’s Thesis) • Model Calibration- TNRCC Group C Basins + Texas • Watershed Delineation - w/ higher resolution DEM • Lakes, Bays, Estuaries, etc. ?? • Corpus Christie Bay approach – Mass Balance • Use BASINS 2.1 – Available Jan 2000 • Supports Spatial Analyst • Other S.W.Q. models, TMDL applications: • WEPP •QUAL-TX • PRSM •WASP • CE-QUAL-W2

  13. Questions?

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