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Blue Spring Water Quality Jackson County, FL

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NWFWMD
Kris Barrios
January 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 Discharge
NWFWMD and USGS Data
Time Series Plot of Measured Blue Spring Discharge
300
Blue Spring Discharge (cfs)
250
200
150
100
50
0
Date
Merritt’s Mill Pond Spring Locations
Merritt’s Mill Pond Submerged Springs – Discharge Measurements July 2007
Blue Spring = 39.1 cfs
Shangri-La Spring = 3.87 cfs
Twin Caves Spring = 1.60 cfs
Hole-in-the-Wall Spring = 1.28 cfs
Gator Hole Spring = 0.93 cfs
Heidi Hole Spring = 0.16 cfs
Total Measured Springs = 46.9 cfs
Merritt’s Mill Pond Outflow = 56.3 cfs
14%
17%
69%
Blue Spring
Minor Springs
Other Sources
Blue Spring as a Component of Merritt’s Mill Pond Outflow
350
300
Merritt's Outflow (cfs)
250
200
150
100
50
date
Blue Spring Averages ~ 70%
12/14/09
9/22/09
8/24/09
6/1/09
1/26/09
9/22/08
7/7/08
1/17/08
1/14/08
7/16/07
6/4/07
2/15/07
0
11/30/06
Discharge (cfs)
Blue Spring Discharge (cfs)
Elevation = 75.64’ NAVD
Merritt’s Mill Pond Outflow Control Structure
Relationship of Merritt’s Mill Pond Elevation to Blue Spring Discharge
Time Series - Merritt's Mill Pond Elevation and Measured Blue Spring Discharge
79
250
78
150
100
77
50
76
0
date
Discharge (cfs)
Ground Water Elevation, ft NAVD
200
Merritt's Mill Pond Elevation - Blue Spring Discharge Regression
300
Blue Spring Discharge, CFS
250
200
150
100
y = 1E-39e1.2222x
RВІ = 0.7034
50
0
76.00
76.50
77.00
77.50
Merritt’s Mill Pond Elevation, ft NAVD
78.00
78.50
For Discharge in Cubic Feet per Second
Q (flow) = Pipe Area * в€љ(32.17*h)
h
Q
Determining Ground Water Level
Potentiometric Surface:
A visual representation of the elevation of
the water table relative to sea level.
Ground Water Elevation, ft NAVD
Time Series - Pittman VISA Ground Water Elevation with Blue Spring Discharge
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
250
200
150
100
50
0
date
Ground Water Elevation - Blue Spring Discharge Regression
300
y = 0.0361x2 + 10.138x - 979.69
RВІ = 0.9347
Blue Spring Discharge, CFS
250
200
150
100
50
0
75
77
79
81
83
85
87
GW Elevation, ft NAVD
89
91
93
95
Time Series Plot of Rated Blue Spring Discharge
340
320
300
280
Blue Spring Discharge, CFS
260
240
220
200
180
160
140
120
100
80
60
40
20
Date
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
Time Series Plot of Rated Blue Spring Discharge and Nitrate Concentration
340
6.00
320
300
5.00
280
260
4.00
220
200
180
3.00
160
140
2.00
120
100
80
1.00
60
40
20
12/20/04
12/20/05
12/20/06
12/20/07
Date
12/20/08
0.00
12/20/09
Nitrate Concentration (mg/L)
Blue Spring Discharge, CFS
240
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