Yucca Pens Hydrogeologic Assessment Conducted for Charlotte Harbor - PowerPoint PPT Presentation

Yucca Pens Hydrogeologic Assessment Conducted for Charlotte Harbor National Estuary Program (CHNEP) and Florida Fish and Wildlife Conservation Commission (FWC) Conducted by Southwest Engineering & Design and Water Science Associates September 18, 2019

Projec ect Obj Objec ectives • Install two water supply wells for prescribed burns • Drill 30 borings to characterize sub-surface hydrogeologic conditions • Install 14 monitoring wells with data loggers to ease burden on FWC staff and to provide more detailed groundwater elevation data • Survey 56 cross sections in flow-ways where LiDAR data is often inaccurate

Water S Supply ly W Wells ells • Prior prescribed burns were managed with a water supply at FWC Babcock Webb field station east of I-75 (10 miles away) • North Well installed at Yucca Pens check station • South well installed at North Dead Hog Grade • Production rate > 85 gpm

Well C Constructi tion

Borings gs • Boring depths ranged from 30 to 100 feet • Depth to confining layer defined • Shallow semi-confining layers identified • Gravel/rock zones identified • Multiple confining layers found at initial location of southern production well • Alternative location ID’d for southern production well

Mon onit itorin ing W Well ells • Monitoring wells located at manual staff gaging locations established in 2011 by USGS • Manual readings difficult due to high water conditions • Draining of groundwater indicated from 2018 well near Gator Slough • Purpose of southern wells is to define the drainage effect of Gator Slough • Southern locations have wells that are 6’ and 30’ deep

Impact o of Gator Slough o on Yucc cca Pe Pens Well 3 Wet Season Depth to WT Water Levels at Well 2, Yucca Pens Concrete Weir 0 14 13 -1 WT Relative Land Surface 12 -2 11 ft-NAVD -3 10 Wells will define 9 -4 this slope 8 -5 7 Gator Slough 6 -6 4/30/18 5/20/18 6/9/18 6/29/18 7/19/18 8/8/18 8/28/18 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Distance, ft Well Water Elev STA-4 Ground Water Elev at Weir Weir Invert

Surveyed C Cross Sections Cross Section 5 27.0 25.0 23.0 21.0 ft-NAVD 19.0 17.0 15.0 13.0 11.0 0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 180.0 200.0 Distance from Left Bank, ft

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections