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Ordway Water Quality and Weather Data

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Environmental Studies Department
Olin Rice 249
1600 Grand Avenue
St. Paul, MN 55105
651-696-6274
Comments & questions to:
esson@macalester.edu



Ordway Water Quality and Weather Data

  
Water Quality Monitoring StationFunding from the Mellon Foundation provided the resources necessary to install a real-time water quality monitoring station at River Lake, a backwater lake of the Mississippi River found at Macalester’s Katherine Ordway Natural History Study Area.

The parameters include:

Water Quality

  • Temperature – this is the temperature of the water about 1 m below the surface
  • Specific Conductivity – a measure of the electrical conductivity of the water – this is related to the total number of ions in the water and is often correlated with the amount of Ca++, Mg++, Na+ and K+ – often waters with greater conductivity are more productive
  • pH – measures the acidity of the water – the lower the pH the more acidic the water
  • Turbidity – measures the amount of suspended material in the water – this can be influenced by the amount of sediment and algae in the water
  • ODOsat– Dissolved oxygen saturation – the % of O2 in the water - O2 is produced by algae during the day and consumed by them during the night - O2 is consumed by non-photosynthetic organisms both day and night – water can become super-saturated (>100%) if there is a great deal of photosynthesis
  • ODO mg/L – concentration of dissolved O2
  • PAR – photosynthetically active radiation – the amount of light hitting a sensor approximately 6 m above the water surface.

Weather

  • PAR – photosynthetically active radiation – the amount of light hitting a sensor approximately 10 m above the land surface.
  • Temperature – this is the temperature of the air about 10 m above the surface
  • Wind Direction – 0 degrees in North.
  • Wind Speed – Averaged over 15 min
  • Relative Humidity – A measure of the moisture content of the air
  • Barometric Pressure – Pressure is not corrected for elevation
  • Daily Rain - The amount of rain that has fallen in the past 24 hours
  • Rain Intensity – The average amount of rain per hour over the last 30 min.

This information can also be found at Ordway Natural History Study Area - Macalester College.

 

 

 

 


Macalester College · 1600 Grand Avenue, St. Paul, MN 55105  USA · 651-696-6000
Comments and questions to esson@macalester.edu