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Watersheds and Flow Impacts on the Mission-Aransas Estuary

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Presentation on theme: "Watersheds and Flow Impacts on the Mission-Aransas Estuary"— Presentation transcript:

1 Watersheds and Flow Impacts on the Mission-Aransas Estuary
Sarah Douglas GIS in Water Resources Fall 2016

2 Purpose Explore the relationship between river discharge and nutrient input to an estuarine system Compare water quality and nutrient parameters in the Mission-Aransas Estuary over periods of drought to periods of drought recovery Determine potential impact of land usage in the watersheds draining to the estuary

3 UT Marine Science Institute and the NERR

4 Elevation

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6 Freshwater input to the estuary is extremely variable

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14 Conclusions Fertilizing nutrients from agriculture appear to be transported from the watershed to the estuary by the Mission and Aransas rivers Freshwater input (or lack thereof) controls the salinity of the back bays over tidal exchange

15 Long-term Impacts • Loss of critical salt marshes
• Mangrove encroachment

16 Questions? Aransas Bay

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