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Freshwater flows to bays and estuaries

Freshwater flows to bays and estuaries. Paul Montagna George Ward University of Texas at Austin. PROBLEMS. SCIENTIFIC:. WHAT IS THE RELATION BETWEEN INFLOW AND THE ESTUARY ECOSYSTEM?. POLICY:. WHAT ARE THE SOCIETAL TRADE-OFFS BETWEEN POPULATION GROWTH AND ECOSYSTEM MAINTENANCE?.

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Freshwater flows to bays and estuaries

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  1. Freshwater flows tobays and estuaries Paul MontagnaGeorge Ward University of Texas at Austin

  2. PROBLEMS SCIENTIFIC: WHAT IS THE RELATION BETWEEN INFLOW AND THE ESTUARY ECOSYSTEM? POLICY: WHAT ARE THE SOCIETAL TRADE-OFFS BETWEEN POPULATION GROWTH AND ECOSYSTEM MAINTENANCE? REGULATORY: HOW DO WE IMPLEMENT THE AGREED POLICY AND ENSURE THAT IT WORKS?

  3. SCIENCE E = f(Q) monitor Q (s,t) POLICY REGULATORY

  4. HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES (currents, mixing, water depths) (distribution & abundance of organisms) (water quality) CAUSE EFFECT

  5. HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES (currents, mixing, water depths) (distribution & abundance of organisms) (water quality) WARD MONTAGNA

  6. RIVER ESTUARY OCEAN BOUNDARY ZONE

  7. ESTUARIES transitional systems, between freshwater and marine hydrography and chemistry governed by both terrestrial and marine controls terrestrial controls: freshwater influxes, flooding & inundation, runoff and inflow loads (sediment, nutrients, pollutants), and atmospheric deposition marine controls: tides, waves, non-astronomical sea-level variations, marine storms, salinity, and littoral sediment influx predominance of these factors depends upon position in estuary: pronounced environmental gradients extreme time variability in estuary

  8. Sabine Lake Galveston Bay Matagorda Bay San Antonio Bay Aransas-Copano Bays Corpus Christi Bay Upper Laguna Madre-Baffin Bay Lower Laguna Madre

  9. HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS

  10. EXTERNAL (FORCING) VARIABLES EXTERNAL VARIABLES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES INTERNAL VARIABLES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS

  11. METEOROLOGY INFLOW LOADS INSOLATION MIGRATION OCEANSALINITY TIDES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS

  12. SCIENTIFIC STRATEGIES 1 - Model cause-and-effect linkages

  13. SCIENTIFIC STRATEGIES 1 - Model cause-and-effect linkages 2 - Relate variables statistically

  14. SCIENTIFIC STRATEGIES 1 - Model cause-and-effect linkages 2 - Relate variables statistically

  15. METEOROLOGY INFLOW LOADS INSOLATION MIGRATION OCEANSALINITY TIDES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS

  16. METEOROLOGY INFLOW LOADS INSOLATION MIGRATION OCEANSALINITY TIDES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS

  17. METEOROLOGY INFLOW LOADS INSOLATION MIGRATION OCEANSALINITY TIDES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS 1 - Model cause-and-effect linkages

  18. METEOROLOGY INFLOW LOADS INSOLATION MIGRATION OCEANSALINITY TIDES HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES SOLIDS CURRENTS HYDRODYNAMIC TRANSPORT WATERBORNECONSTITUENTS BIOLOGICALCOMMUNITIES FLORA NUTRIENTS DENSITY HERBIVORES SALINITY MIXING CARNIVORES OTHERS 2 - Relate variables statistically

  19. TWO PRECEPTS Any assumed functional variation of a model represents a source of error. Any external variable not explicitly modeled represents a source of variance.

  20. Hydrologyof Texas estuaries

  21. TWO (2) FACTS ABOUT TEXAS RAINFALL PRODUCED ALMOST ENTIRELY FROM DEEP CONVECTION DECLINES PRECIPITOUSLY FROM EAST TO WEST

  22. Isohyets in inches/year

  23. TWO (2) FACTS ABOUT TEXAS RUNOFF SMALL AS A PROPORTION OF RAINFALL DECLINES EVEN MORE PRECIPITOUSLY FROM EAST TO WEST

  24. RUNOFF / RAINFALL

  25. TWO (2) FACTS ABOUT TEXAS STREAM FLOW FLASHY SUBSTANTIAL YEAR-TO-YEAR (& LONG-TERM) VARIABILITY

  26. Guadalupe River at Victoria daily flow 30-day sliding mean

  27. 2.7 3.9 8.9 14.3 years

  28. Mid-Galveston Bay salinity versus Trinity River flow

  29. Freshwater flows tobays and estuaries Paul MontagnaGeorge Ward University of Texas at Austin

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