NWFWMDKris BarriosJanuary 14,

2010

Blue Spring NWFWMD Hydrologic Data Collection

Completed•Blue Spring basin refinement•LiDAR elevation mapping•Ground water chemical characterization of the Blue Spring Basin

Ongoing Monitoring•Quarterly springs water quality and discharge•Continuous ground water level•Continuous rainfall•Quarterly ground water level measurements •Randomized ground and surface water quality

Blue Spring Discharge Measurements

Summary of Blue Spring Measured DischargeNWFWMD and USGS Data

Merritt’s Mill Pond Spring Locations

Merritt’s Mill Pond Submerged Springs – Discharge Measurements July 2007

Blue Spring = 39.1 cfsShangri-La Spring = 3.87 cfsTwin Caves Spring = 1.60 cfsHole-in-the-Wall Spring = 1.28 cfsGator Hole Spring = 0.93 cfsHeidi Hole Spring = 0.16 cfsTotal Measured Springs = 46.9 cfsMerritt’s Mill Pond Outflow = 56.3 cfs

Blue Spring as a Component of Merritt’s Mill Pond Outflow

Dis

char

ge (c

fs)

date

Blue Spring Averages ~ 70%

Elevation = 75.64’ NAVD

Merritt’s Mill Pond Outflow Control Structure

Relationship of Merritt’s Mill Pond Elevation to Blue Spring Discharge

h

Q

For Discharge in Cubic Feet per Second

Q (flow) = Pipe Area * √(32.17*h)

Determining Ground Water Level

Potentiometric Surface:A visual representation of the elevation ofthe water table relative to sea level.

Blue Spring Discharge December 2004 – December 2009

Average = 113 cfs, 73 million gallons per day

Maximum = 283 cfs, August 10-11, 2005

Minimum = 28 cfs, December 17-20, 2007