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Water Quality Trends of the Kissimmee Chain of Quality Trends of the Kissimmee Chain of Lakes, Lake Istokpoga and Lake Okeechobee ... Jan-81 Jan-83 Jan-85 Jan-87 Jan-89 Jan-91 Jan-93

Mar 18, 2018

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    Water Quality Trends of the Kissimmee Water Quality Trends of the Kissimmee Chain of Lakes, Lake Istokpoga and Chain of Lakes, Lake Istokpoga and

    Lake OkeechobeeLake Okeechobee

    R. Thomas James, Brad Jones, Paul McCormickR. Thomas James, Brad Jones, Paul McCormickSouth Florida Water Management DistrictSouth Florida Water Management District

    Clell FordClell FordHighlands County, FloridaHighlands County, Florida

    andand

    Karl HavensKarl HavensFlorida Sea GrantFlorida Sea Grant

    University of FloridaUniversity of Florida

  • ObjectivesObjectivesEvaluate long term data for the Kissimmee Evaluate long term data for the Kissimmee Chain of Lakes, Lake Istokpoga, Lake Chain of Lakes, Lake Istokpoga, Lake OkeechobeeOkeechobeeDetermine if trends exist in Determine if trends exist in

    NutrientsNutrientsTurbidity and TransparencyTurbidity and TransparencyChlorophyllChlorophyllConductivity and IonsConductivity and Ions

    Determine relationships among lakesDetermine relationships among lakesLook for causalityLook for causality

  • WatershedWatershedDrainage Area 13,859 kmDrainage Area 13,859 km22

    6 regions6 regions61 basins61 basinsLanduseLanduse

    NaturalNaturalAgriculturalAgriculturalResidentialResidential

    Changed over timeChanged over time

  • Upper Chain of LakesUpper Chain of Lakes

    Headwaters of Kissimmee RiverHeadwaters of Kissimmee RiverSampling began in 1981Sampling began in 1981Lakes interconnected by canalsLakes interconnected by canalsWater Levels RegulatedWater Levels RegulatedHydrilla Increased through the Hydrilla Increased through the 1990s1990s

    Chemical control has been Chemical control has been partially effectivepartially effectiveLakewide treatments in late 90sLakewide treatments in late 90sHurricanes and turbidity helped Hurricanes and turbidity helped to control in the 2000sto control in the 2000s

    East Lake Tohopekaliga

  • Lake IstokpogaLake Istokpoga

    Fifth largest Lake in Fifth largest Lake in FloridaFloridaSampled since 1988Sampled since 1988Outflow Structure built in Outflow Structure built in 19611961Waters regulated within a Waters regulated within a few feetfew feet

  • Lake OkeechobeeLake OkeechobeeLargest Lake In SoutheastLargest Lake In Southeast

    1730 km1730 km22

    ShallowShallow

    Sampled since 1973Sampled since 1973Surrounded by Herbert Surrounded by Herbert Hoover DikeHoover DikeAll inflow and outflows All inflow and outflows except Fisheating Creek are except Fisheating Creek are regulatedregulated

  • SamplingSampling

    Samples taken on a monthly basisSamples taken on a monthly basisWater samples analyzed for ions, nutrients Water samples analyzed for ions, nutrients and chlorophyll using standard methods and chlorophyll using standard methods Transparency measured with a Secchi Transparency measured with a Secchi Disk Disk

  • AnalysisAnalysis

    KendallKendalls s TauTau analysis analysis GraphicsGraphics

    TimelinesTimelinesFit with 2Fit with 2ndnd order polynomial curveorder polynomial curve

  • Significant Trends 1981 to 2007Significant Trends 1981 to 2007

    -0.9873-2.9379-0.1857CHLA

    0.00030.00030.0004DIN

    -0.0094-0.0179-0.0437TN

    0.0000SRP

    -0.0021-0.0045TP

    -0.0190-0.0617-0.0238SI

    0.0150SECCHI

    -0.3700-0.0333TURB

    -1.8571SCOND

    -0.2154-0.1806-0.3937-0.2322SULFATE

    CL

    0.2533CA

    KissimmeeHatchinehaCypressTohopekaligaEast TohopekaligaParameter

  • East Lake TohopekaligaEast Lake Tohopekaliga

    0

    0.01

    0.02

    0.03

    0.04

    0.05

    0.06

    0.07

    0.08Ja

    n-81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Tota

    l Pho

    spho

    rus

    (mg/

    l)

    0

    0.5

    1

    1.5

    2

    2.5

    3

    3.5

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Secc

    hi D

    isk

    Dep

    th (m

    )

    05

    1015202530354045

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Chl

    orop

    hyll

    a (

    g/l)

    0

    0.5

    1

    1.5

    2

    2.5

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Tota

    l Nitr

    ogen

    (mg/

    l)

  • Lake TohopekaligaLake Tohopekaliga

    0

    0.1

    0.2

    0.3

    0.4

    0.5

    0.6

    0.7

    0.8

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Tota

    l Pho

    spho

    rus

    (mg/

    l)

    0

    1

    2

    3

    4

    5

    6

    7

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Tota

    l Nitr

    ogen

    (m

    g/l)

    0

    0.5

    1

    1.5

    2

    2.5

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Secc

    hi D

    isk

    Dep

    th (m

    ))

    0

    50

    100

    150

    200

    250

    300

    Jan-

    81

    Jan-

    84

    Jan-

    87

    Jan-

    90

    Jan-

    93

    Jan-

    96

    Jan-

    99

    Jan-

    02

    Jan-

    05

    Jan-

    08

    Chl

    orop

    hyll

    a (

    g/l)

  • Lake CypressLake Cypress

    0

    0.05

    0.1

    0.15

    0.2

    0.25

    0.3

    0.35

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Tota

    l Pho

    spho

    rus

    (mg/

    l)

    00.20.40.60.8

    11.21.41.61.8

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Secc

    hi D

    isk

    Dep

    th (m

    )

    0

    50

    100

    150

    200

    250

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Chl

    orop

    hyll

    a (

    g/l)

    0

    1

    2

    3

    4

    5

    6

    Jan-

    82

    Jan-

    84

    Jan-

    86

    Jan-

    88

    Jan-

    90

    Jan-

    92

    Jan-

    94

    Jan-

    96

    Jan-

    98

    Jan-

    00

    Jan-

    02

    Jan-

    04

    Jan-

    06

    Jan-

    08

    Tota

    l Nitr

    ogen

    (mg/

    l)

  • Lake HatchinehaLake Hatchineha

    00.020.040.060.08

    0.10.120.140.160.18

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Tota

    l Pho

    spho

    rus

    (mg/

    l)

    0.0

    0.5

    1.0

    1.5

    2.0

    2.5

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Chl

    orop

    hyll

    a (

    g/l)

    0

    1

    2

    3

    4

    5

    6

    7

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Tota

    l Nitr

    ogen

    (mg/

    l)

    0

    0.5

    1

    1.5

    2

    2.5

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Sec

    chi D

    isk

    Dep

    th (m

    )

  • Lake KissimmeeLake Kissimmee

    0

    0.02

    0.04

    0.06

    0.08

    0.1

    0.12

    0.14

    0.16Ja

    n-82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Tota

    l Pho

    spho

    rus

    (mg/

    l)

    0.00.20.40.60.81.01.21.41.61.82.0

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Secc

    hi D

    isk

    Dep

    th (m

    )

    0

    20

    40

    60

    80

    100

    120

    140

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91

    Jan-

    94

    Jan-

    97

    Jan-

    00

    Jan-

    03

    Jan-

    06

    Chl

    orop

    hyll

    a (

    g/L)

    0

    0.5

    1

    1.5

    2

    2.5

    3

    Jan-

    82

    Jan-

    85

    Jan-

    88

    Jan-

    91