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Water quality in the estuary

Water quality in the estuary. Exploring NERRS real-time data at South Slough and field work at Empire docks. What is an estuary?. An estuary is formed where rivers meet the sea An estuary is a semi-enclosed river mouth or bay where salty seawater is diluted by freshwater from rivers and creeks

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Water quality in the estuary

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  1. Water quality in the estuary Exploring NERRS real-time data at South Slough and field work at Empire docks

  2. What is an estuary? • An estuary is formed where rivers meet the sea • An estuary is a semi-enclosed river mouth or bay where salty seawater is diluted by freshwater from rivers and creeks • An estuary is made up of tidal marshes, tidal flats, and open water channels • An estuary is flooded by the tides

  3. What does an estuary look like from the air?

  4. PacificOcean Coos Bay South Slough NERR South Slough NERR NERRS • a 4,771+ acre protected natural area • A place to investigate and conduct studies (research) • A place for people to learn about estuaries and their watersheds (education) • A place to restore and protect estuaries and their watersheds (stewardship)

  5. Temperatures (˚C) in Coos bay & South slough… • Where is the shallowest water in the bay? • Where would we find the coldest water? • The warmest water?

  6. Explain the pattern over a year

  7. Explain the pattern over a day Data in the classroom

  8. Understanding Dissolved Oxygen (mg/L) • Different factors influence levels of DO • Fast flowing water mixes and absorbs more DO • Organisms living in the water may deplete oxygen levels because they need it (biological demand) • Primary producers generate (add) oxygen through photosynthesis. • Should oxygen levels in water rise or fall on a sunny day? • How much DO can fit into water depends on the temperature of the water. This is called the solubility of oxygen.

  9. Explain the pattern found on June 1st, 2009 Data in the classroom

  10. Introducing salinity (ppt) • Varies in the ocean very little • Why then do estuaries vary so much? Sixes Estuary

  11. Examining salinity in South Slough Data in the Classroom

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