Vegetation Analysis Report (2022 December 19

Survey Metadata
Data Collector:	Greg Knothe
Survey Time Stamp (UTC):	2022 August 15 - 13:16
Starting Location:	28.101692, -81.962792
Ending Location:	28.110392, -81.950182
Distance	10.279 miles

Survey Statistics
Average Water Temperature:	87.0 °F
Survey Area:	492.149 acres
Survey Volume:	3028.442 acre ft
Percent of Waterbody Surveyed:	98.8%
Waterbody Area:	497.889 acres
Estimated Waterbody Volume	3063.764 acre ft

Survey Settings
Includes Edited Data:	Yes
Track Buffer:	95 m
BV Grid Cell Size:	19 m
BV Minimum Detection - Percent:	5.0%
BV Minimum Detection - Depth:	2.400 ft
BV Maximum Detection - Depth:	20.000 ft
BV Sonar Channel:	NA

Survey Summary

Type?	PAC?	Avg BVp?	SD BVp?	Avg BVw?	SD BVw?	Depth Range	Depth Avg	No. Depth Records
Point	7.5%	10.8%	± 11.4%	0.8%	± 5.5%	2.04 - 19.32 ft	6.469 ft	9544
Grid	3.1%	10.7%	± 6.3%	0.3%	± 2.1%	0.20 - 17.99 ft	6.153 ft	7070

Bathymetric Contour Map	Vegetation Biovolume Heat Map
0' 18'

Biovolume Analysis by Quintiles

None

None

Type ?	0 - 20%	20 - 40%	40 - 60%	60 - 80%	80 - 100%
Point	99.5%	0.0%	0.0%	0.2%	0.2%
Grid	99.7%	0.3%	0.0%	0%	0%

Biovolume Analysis by Depth

Type?	Depth	Count	PAC?	Avg BVp?	SD BVp?	Avg BVw?	SD BVw?
Point	0 - 1 m	26	21.8%	30.4%	± 31.2%	6.6%	± 20.2%
	1 - 2 m	407	11.1%	11.4%	± 12.5%	1.3%	± 7.3%
	2 - 3 m	226	4.6%	7.5%	± 7.4%	0.3%	± 1.7%
	3 - 4 m	0	0%	0%	± 0%	0%	± 0%
	4 - 5 m	0	0%	0%	± 0%	0%	± 0%
	5 - 6 m	0	0%	0%	± 0%	0%	± 0%
	6 - 7 m	0	0%	0%	± 0%	0%	± 0%
	7 - 8 m	0	0%	0%	± 0%	0%	± 0%
	8 - 9 m	0	0%	0%	± 0%	0%	± 0%
	9 m +	0	0%	0%	± 0%	0%	± 0%
Grid	0 - 1 m	1067	14.9%	11.1%	± 6.4%	1.7%	± 4.7%
	1 - 2 m	2254	2.3%	9.8%	± 5.9%	0.2%	± 1.7%
	2 - 3 m	3672	0.1%	6.2%	± 0.8%	0.0%	± 0.2%
	3 - 4 m	55	0%	0%	± 0%	0%	± 0%
	4 - 5 m	17	0%	0%	± 0%	0%	± 0%
	5 - 6 m	6	0%	0%	± 0%	0%	± 0%
	6 - 7 m	0	0%	0%	± 0%	0%	± 0%
	7 - 8 m	0	0%	0%	± 0%	0%	± 0%
	8 - 9 m	0	0%	0%	± 0%	0%	± 0%
	9 m +	0	0%	0%	± 0%	0%	± 0%

Glossary

AOI: Area of Interest: Defines the individual transects or contiguous data samples as depicted by the color coding of each trip line. Seperate areas of interest can be generated through merging of multiple trips, appending data to a single sonar log or lapses in time (greater than five minutes) within a sonar log.
BVp: Biovolume (Plant): Refers to the percentage of the water column taken up by vegetation when vegetation exists. Areas that do not have any vegetation are not taken into consideration for this calculation.
BVw: Biovolume (All water): Refers to the average percentage of the water column taken up by vegetation regardless of whether vegetation exists. In areas where no vegetation exists, a zero value is entered into the calculation, thus reducing the overall biovolume of the entire area covered by the survey.
PAC: Percent Area Covered: Refers to the overall surface area that has vegetation growing.
Grid: Geostatistical Interpolated Grid: Interpolated and evenly spaced values representing kriged (smoothed) output of aggregated data points. The gridded data is most accurate summary of individual survey areas.
Point: Individual Coordinate Point: A single point represents a summary of sonar pings and the derived bottom and canopy depths. Individual point data create an irregularily spaced dataset that may have overlaps and/or gaps in the data resulting in a increased potential for error.
Type: Individual Coordinate Point: A single point represents a summary of sonar pings and the derived bottom and canopy depths. Individual point data create an irregularily spaced dataset that may have overlaps and/or gaps in the data resulting in a increased potential for error.

Geostatistical Interpolated Grid: Interpolated and evenly spaced values representing kriged (smoothed) output of aggregated data points. The gridded data is most accurate summary of individual survey areas.
Estimated Waterbody Volume: Estimated Waterbody Volume: The total lake volume estimation is based on this dataset only and will depend on total coverage and coverage depths of collected data.

Offsets

Trip Name	Trip Date (UTC)	Manual Offset (ft)	Tide Station Name	Avg Tide (ft)	Min Tide (ft)	Max Tide (ft)	Start Tide (ft)	End Tide (ft)
Sonar_2022-08-15_1 ...	2022 August 15 - 15:08	0.750	NA	NA	NA	NA	NA	NA
Sonar_2022-08-15_0 ...	2022 August 15 - 14:56	0.750	NA	NA	NA	NA	NA	NA
Sonar_2022-08-15_1 ...	2022 August 15 - 14:15	0.750	NA	NA	NA	NA	NA	NA
Sonar_2022-08-15_0 ...	2022 August 15 - 13:58	0.750	NA	NA	NA	NA	NA	NA
Sonar_2022-08-15_0 ...	2022 August 15 - 13:16	0.750	NA	NA	NA	NA	NA	NA

Lake Gibson, Polk Florida

Survey Summary

Manual Vegetation

Manual Depth

Biovolume Analysis by Quintiles

Biovolume Analysis by Depth

Glossary

Offsets