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Manatee River Watershed

Manatee River Watershed

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Description

Explore general as well as scientific information about the movement, chemistry and biology of area surface and ground water environments.

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Groundwater Quantity: Aquifer Resource Indicator

Groundwater Quantity

Southwest Florida Water Management District calculates the Aquifer Resource Indicator (ARI) for their three groundwater regions each month. The ARI was created to provide the public with a gauge of groundwater levels in their area, so they can develop an understanding of the severity and cycles of drought and recovery. The three regions include: North (Citrus, Hernando, Lake, Levy, Marion and Sumter counties), Central (Hillsborough, Pasco, Pinellas, and Polk counties), and South (Charlotte, DeSoto, Hardee, Highlands, Manatee, and Sarasota counties). Learn More about the Aquifer Resource Indicator >>

To determine the ARI for a region, each well is compared weekly to its respective low-normal value and the difference is calculated. The weekly differences are reduced to a monthly value for all monitoring wells within a region, and the resulting ARI value represents how far water levels in the aquifer must rise or fall to reach their respective low-normal values.

One Year Graph of ARI
Source: SWFWMD Hydrologic Data Section Data
Click here to view a period of record graph for the central, north, and south groundwater regions


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    Water Quality

    Water Quality

    The following data are summarized as seasonal average values for lake and river sampling locations located within the watershed. While these data are useful to serve as a general picture of watershed health, these data must be viewed with caution because these samples have been taken from ecologically different water resources.

    Rivers:
    Samples from most rivers located in this watershed are averaged as part of these data summaries.
    Season Total Nitrogen Nitrate (NO3) Total Phosphorus Orthophosphate Number of Sample Stations Number of Samples
    JAN-MAR 2014 No Data Available 358.9 ug/l 384 ug/l 0.33 mg/l 17 45
    OCT-DEC 2013 1,082 ug/l 505.0 ug/l 272 ug/l 0.21 mg/l 34 93
    JUL-SEP 2013 1,173 ug/l 261.5 ug/l 334 ug/l 0.27 mg/l 35 98
    APR-JUN 2013 1,081 ug/l 207.1 ug/l 305 ug/l 0.25 mg/l 34 96
    JAN-MAR 2013 864 ug/l 188.2 ug/l 266 ug/l 0.21 mg/l 34 94
    OCT-DEC 2012 947 ug/l 286.3 ug/l 306 ug/l 0.25 mg/l 35 98
    JUL-SEP 2012 1,178 ug/l 220.7 ug/l 323 ug/l 0.29 mg/l 35 98
    APR-JUN 2012 1,075 ug/l 151.7 ug/l 395 ug/l 0.32 mg/l 35 78
    JAN-MAR 2012 760 ug/l 238.1 ug/l 290 ug/l 0.22 mg/l 35 97
    Five Year Seasonal Graph
    Five Year Graph of All Samples

    Source(s): FDEP Historic Data from Legacy STORET, Lower watershed program (LWP), FDEP Ambient Monitoring Sampling Data, Manatee County Environmental Management Sampling Data, South West Florida Water Management District Sampling Data, USGS National Water Information System

    Lakes:
    Samples from most lakes located in this watershed are averaged as part of these data summaries.
    Season Total Nitrogen Nitrate (NO3) Total Phosphorus Orthophosphate Number of Sample Stations Number of Samples
    JAN-MAR 2014 No Data Available 258.8 ug/l 261 ug/l 0.22 mg/l 2 6
    OCT-DEC 2013 1,102 ug/l 271.0 ug/l 269 ug/l 0.22 mg/l 4 12
    JUL-SEP 2013 1,318 ug/l 203.5 ug/l 304 ug/l 0.28 mg/l 4 12
    APR-JUN 2013 1,062 ug/l 88.8 ug/l 205 ug/l 0.17 mg/l 4 12
    JAN-MAR 2013 1,000 ug/l 187.7 ug/l 225 ug/l 0.18 mg/l 4 10
    OCT-DEC 2012 1,114 ug/l 212.9 ug/l 243 ug/l 0.23 mg/l 4 11
    JUL-SEP 2012 1,138 ug/l 148.0 ug/l 272 ug/l 0.31 mg/l 4 12
    APR-JUN 2012 1,305 ug/l 64.1 ug/l 291 ug/l 0.22 mg/l 3 8
    JAN-MAR 2012 925 ug/l 211.6 ug/l 230 ug/l 0.19 mg/l 4 12
    Five Year Seasonal Graph
    Five Year Graph of All Samples

    Source(s): Lower watershed program (LWP), FDEP Ambient Monitoring Sampling Data, Manatee County Environmental Management Sampling Data, USGS National Water Information System

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      Stream Flow and Levels

      Stream level and flow data for the Manatee River Watershed. Learn More about Stream Flow »

      Stream Flow and Levels
      River Flows Whole River Range Flows Data by Segment Levels Whole River Range Levels Data By Segment
      Cypress Strand In the past 30 days
      No data available
      Recent river flow data is unavailable.
        No data table or graph available
      In the past 30 days
      up Average water levels are higher than they have been historically.
      Gamble Creek In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      down Average water levels are lower than they have been historically.
      Wares Creek In the past 30 days
      No data available
      Recent river flow data is unavailable.
        No data table or graph available
      In the past 30 days
      same Average water levels are the same as they have been historically.
      Lower Manatee River In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      same Average water levels are the same as they have been historically.
      Upper Manatee River In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      up Average water levels are higher than they have been historically.
      Braden River In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      up Average water levels are higher than they have been historically.

      Source(s): Hillsborough County Environmental Protection Commission, LAKEWATCH, Manatee County Department of Environmental Management, Southwest Florida Water Management District, Southwest Florida Water Management District, USGS National Water Information System

      Source(s): Not Available
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        Advanced Data Features

        Files Graphs

        Data Download and Advanced Graphing Tool
        Download and/or graph water quality, hydrology, and rainfall trends using the data presented on the Atlas for use in your own analyses and reports.

         
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