Impact of 2006-2007 Drought on Impact of 2006-2007 Drought on Jackson Blue SpringJackson Blue Spring

Kris Barrios

Northwest Florida Water Management District

Rank    Value      Year  

Number of Days

Missing Values

1 29.09 1954 0

2 38.92 1952 1

3 39.15 1981 0

4 40.66 1955 0

5 41.24 1974 0

6 41.65 1940 30

7 41.83 1968 0

8 42.76 2007 0

9 42.86 1943 0

10 44.23 1999 62

11 44.21 2000 0

12 45.18 2006 0

13 45.46 1990 0

14 46.08 1962 0

15 46.96 1972 0

16 47.14 1941 10

17 48.83 1986 0

18 49.02 1976 31

19 49.08 1969 0

20 49.14 1971 0

Period RankTwo-Year

Cumulative Rainfall

1954-1955 1 69.75

2006-2007 2 87.94

1999-2000 3 88.44

1940-1941 4 88.79

1951-1952 5 89.66

1968-1969 6 90.91

1980-1981 7 91.34

1967-1968 8 93.71

1953-1954 9 95.68

1971-1972 10 96.1

1955-1956 11 97.36

1939-1940 12 99.14

1942-1943 13 99.69

1957-1958 14 102.24

1950-1951 15 102.39

1981-1982 16 103.42

1966-1967 17 103.43

1976-1977 18 103.76

1941-1942 19 103.97

1985-1986 20 104.31

Historic Rainfall Amounts – Annual and Biennial Record Lows

2006-2007 Rainfall Defecit

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

1/1

/2006

2/1

/2006

3/1

/2006

4/1

/2006

5/1

/2006

6/1

/2006

7/1

/2006

8/1

/2006

9/1

/2006

10/1

/2006

11/1

/2006

12/1

/2006

1/1

/2007

2/1

/2007

3/1

/2007

4/1

/2007

5/1

/2007

6/1

/2007

7/1

/2007

8/1

/2007

9/1

/2007

10/1

/2007

11/1

/2007

12/1

/2007

date

cum

ula

tive r

ain

fall (

in)

30- Year Normal

2006- 2007 Rainfall

30-Year Normal Annual Rainfall Total = 58.24 inches

On June 5, 2007 the NWFWMD responded with a water shortage warning:

Order 07-001, Issuance of a Water Shortage Warning within the NWFWMD

“All users in all classes are encouraged to reduce water use and to conserve water to the maximum extent possible.”

Time Series Plot of Pittman VISA Ground Water Elevation vs. Jackson Blue Spring Discharge

77.00

78.00

79.00

80.00

81.00

82.00

83.00

84.00

85.00

86.00

87.00

88.00

89.00

90.00

91.00

92.00

93.00

94.00

95.00

12/2

1/04

01/1

8/05

02/1

5/05

03/1

5/05

04/1

2/05

05/1

0/05

06/0

7/05

07/0

5/05

08/0

2/05

08/3

0/05

09/2

7/05

10/2

5/05

11/2

2/05

12/2

0/05

01/1

7/06

02/1

4/06

03/1

4/06

04/1

1/06

05/0

9/06

06/0

6/06

07/0

4/06

08/0

1/06

08/2

9/06

09/2

5/06

10/2

3/06

11/1

9/06

12/1

7/06

01/1

4/07

02/1

1/07

03/1

1/07

04/0

8/07

05/0

6/07

06/0

3/07

07/0

1/07

07/2

9/07

08/2

6/07

09/2

3/07

10/2

1/07

11/1

8/07

12/1

6/07

01/1

3/08

Date

GW

Ele

vati

on

(fe

et,

NA

VD

88)

20

40

60

80

100

120

140

160

180

200

220

240

260

280

Dis

char

ge

(cfs

)

Pittman VISA GW Elevation (ft)

Discharge Measurement (cfs)

In May 2006, both ground water level and spring discharge drop below average.

Measurements conducted by Karst Environmental Services

Jackson Blue Spring Basin Refinement - 2007

The previous basin delineation used topographic elevation values with +/-5-foot accuracy resulting in 10-foot contours.

The spring basin refinement used LiDAR (Light Detection And Ranging) elevation data with 0.5-foot accuracy. NWFWMD Staff collected water elevation data from 79 wells. The refinement increased the resolution of the Floridan Aquifer surface contours to 2 feet.

water level measurement

LiDAR Elevation Detail

Sinkholes

Karst Depressions

Long term predictions indicate severe drought conditions ahead for the next few months to several years………..

For more information on the springs of Merritt’s Mill Pond:

NWFWMD Technical File Report 07-01: Merritt’s Mill Pond Spring Vent Characterization

Questions?