Friends of Hobbs
State Park-Conservation Area

Secchi Day Science Fair on Beaver Lake

13 Aug 2019 12:39 PM | Anonymous member (Administrator)

What is Secchi Day?  Let’s take a quick step back in history.  Father Pietro Angelo Secchi (1818 – 1878) who was a scientific advisor to the Pope, used the Secchi disk in 1865.  Father Secchi was asked by Commander Cialdi, head of the papal navy, to test a new transparency instrument.  This instrument, now named the Secchi disk, was first lowered from the papal steam yacht Immaculate Conception.  The original disk was plain, white, 12 inches in diameter, and used to measure water turbidity in bodies of water Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, like smoke in air. The measurement of turbidity is a key test of water quality.

Today the Secchi disk is black and white.  It is lowered into a body of water.  The Secchi reading is the depth at which the disk disappears completely from view.

On Secchi Day volunteers will take readings from all over Beaver Lake to determine the over-all clarity or water quality of the water in the lake.  As these readings come back into the Army Corps Prairie Creek Lakeside Amphitheater for posting, family activities and free food will be available.

9 am – 12:15 pm

  • Activities and Exhibits
  • Kayak Rides
  • Music and Dance
  • Fun and Games
  • Snacks, Fruit, and Frozen Desserts

11 am – 12:15 pm

  • Free Chips, Sodas, Hot Dogs and Veggie Dogs
  • Art Awards and Announcements

12:15 pm – 12:30 pm

  • Door prizes – Must be present to win

1:00 pm – Event Ends

Special Guests:

  • Emcee – Dan Skoff, KNWA Chief Meteorologist
  • Al Lopez “PaPa Rap” – Water Fun facts
  • Marshallese Neighbors – Culture of Atolls and Islands

When:  Saturday August 17, 2019  --  9 am – 1 pm

Where:  U.S. Army Corps Prairie Creek Lakeside Amphitheater, 9300 N. Park Road, Rogers, Arkansas 72756

Cost:  FREE

For more information:

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