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Assessing the eutrophication of stormwater ponds using visible aerial imagery (Collier County, FL)

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Date Issued:
2018
Abstract/Description:
Since 1982, stormwater ponds are mandated in Florida to remove more than 80% of the pollutants from the runoff loading into them as well as mimic, through flow regulation, the natural hydro-patterns. However, such ponds are often mismanaged because of questionable aesthetic practices which render them more eutrophic. Most sponsored water quality studies conducted on SW Florida ponds have been conducted on 1.5% of the ponds of Lee and Collier counties. It is unsure whether such studies reflect the real inclusive water quality of all the other ponds since, generally, ponds are studied because of their visual dystrophic state. Thus, this study uses visible aerial Google Earth Pro pictures and utilizes the red, green and blue (RGB) composition of the pictures of the limnetic zone of the ponds to determine their degree of eutrophication. Only 1401 residential ponds out of 4220 (33%) were studied. The RGB measurement was conducted using the software GNU Image Manipulation Program GIMP2. A review of the algorithms used to determine the chlorophyll concentration using RGB pictures was subsequently performed and an algorithm was then selected to be used for our data. A simple linear relationship was then used to convert the algorithm results into chlorophyll a concentrations which were subsequently transformed into Trophic Status Indexes using the proper formula developed for Florida lakes. A histogram was then generated and showed that the vast majority of Collier pond seemed nutrients rich.
Title: Assessing the eutrophication of stormwater ponds using visible aerial imagery (Collier County, FL).
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Name(s): Fischer, Marissa, author
STEM Undergraduate Research Symposium
Type of Resource: text
Genre: Exhibition Posters
Issuance: single unit
Date Issued: 2018
Physical Form: PDF
Language(s): English
eng
Abstract/Description: Since 1982, stormwater ponds are mandated in Florida to remove more than 80% of the pollutants from the runoff loading into them as well as mimic, through flow regulation, the natural hydro-patterns. However, such ponds are often mismanaged because of questionable aesthetic practices which render them more eutrophic. Most sponsored water quality studies conducted on SW Florida ponds have been conducted on 1.5% of the ponds of Lee and Collier counties. It is unsure whether such studies reflect the real inclusive water quality of all the other ponds since, generally, ponds are studied because of their visual dystrophic state. Thus, this study uses visible aerial Google Earth Pro pictures and utilizes the red, green and blue (RGB) composition of the pictures of the limnetic zone of the ponds to determine their degree of eutrophication. Only 1401 residential ponds out of 4220 (33%) were studied. The RGB measurement was conducted using the software GNU Image Manipulation Program GIMP2. A review of the algorithms used to determine the chlorophyll concentration using RGB pictures was subsequently performed and an algorithm was then selected to be used for our data. A simple linear relationship was then used to convert the algorithm results into chlorophyll a concentrations which were subsequently transformed into Trophic Status Indexes using the proper formula developed for Florida lakes. A histogram was then generated and showed that the vast majority of Collier pond seemed nutrients rich.
Identifier: fgcu_UGR_0091 (IID)
Note(s): Poster from the 2018 STEM Undergraduate Research Symposium. Research Mentor: Dr. Serge Thomas.
Subject(s): Dystrophic State
Chlorophyll Concentration
Eutrophication.
Persistent Link to This Record: http://purl.flvc.org/fgcu/fd/fgcu_UGR_0091
Use and Reproduction: Copyright held by author.
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Owner Institution: FGCU

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