This purpose of this project is to provide the students of Alee Academy with hands-on experience in water quality assessment and data reporting. The quality of a water body is often measured by the chemical, physical and biological components that make up the system. The chemical/physical component of water quality often addresses levels of available nutrients as well as temperature, pH, salinity and water clarity while the biological component often describes species composition and diversity. Changes in water quality can occur according to seasonal cycles and may vary greatly between different water bodies due to differences in geology, source water type and human impact.
The members of the Lake County Water Authority have provided this initiative in order to investigate seasonal differences in the water quality of 5 area lakes. Students will periodically sample chemical/physical parameters and conduct a biota assessment of these lakes under direct supervision of Alee faculty member Ivan Mish with periodic accompaniment by Lance Riley of the University of Florida Fisheries and Aquatic Sciences Dept. The results of these assessments will be entered into a spreadsheet by the students and posted on the Alee Academy website for public access.
Water quality assessment for each lake will be divided into two parts, Chemical/Physical Assessment and a Biological Inventory.
The Chemical/Physical Assessment will include the following parameters:
|Parameter||Instrument Used for Measurement|
|GPS Location||Garmin Hand-held GPS|
|Temperature||YSI 550 DO Meter|
|Dissolved Oxygen||YSI 550 DO Meter|
|Water Clarity||Sechi Disk|
|pH||LaMotte pH Meter|
|Salinity||Oakton SaltTester Meter|
|Phosphate||LaMotte Test Kit|
|Nitrate||LaMotte Test Kit|
|Nitrite||LaMotte Test Kit|
|Ammonia||LaMotte Test Kit|
Results from these analysis will be compared to minimum/maximum values as determined by the Florida Department of Environmental Protection (FDEP) criteria for surface water quality classifications. This criteria divides surface waters into the following 4 classes:
- Class I: Potable Water
- Class II: Shellfish Propagation or Harvesting
- Class III: Recreation, Propogation and Maintenance of Healthy Fish and Wildlife
- Class IV: Agricultural Water Supplies
- Class V: Navigation, Utility and Industrial Use
Each lake will be designated with a classification according to the values prescribed by FDEP. Values for all lakes should fall between Class I and Class III and any lake rated below a Class III will require further investigation. The following parameter values limits will be applied for rating a Class III or above water body:
|Dissolved Oxygen||mg/L||Not less than 5.0|
|Water Clarity||Meters||Not Specified|
|pH||pH Units||6 - 8.5|
|Phosphate||Micrograms/L of P||<0.1|
|Nitrate||mg/L as N||<10|
|Nitrite||mg/L as N||Not Specified|
|Ammonia (un-ionized)||mg/L as NH3||<4,300|
The Biological Inventory of each lake will focus on plants and animals along the shoreline and sediment. Particular attention will be given to benthic animals using hand excavation and dredge sampling. Plants and animals will be identified using field manuals and unknown specimens will be preserved for identification by University of Florida faculty. All unionid mussel shells will be taken to the United States Geological Survey (USGS) Biological Research Facility for identification and cataloging by Dr Jim Williams for an upcoming publication on the distribution of mussels in Florida waters. The species inventory for each lake will also be placed on the web for public access.