Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Analysis of Groundwater/Surface Water
Interaction at the Site Scale
Babcock Ranch Community Development
Lee County, Florid...
Babcock Ranch Development
Groundwater/Surface Water Interaction – Babcock Ranch 2
 Land purchased in 1914
 Located on Fl...
Location
West Coast
of Florida
North of Ft.
Myers.
Babcock Ranch Location
Groundwater/Surface Water Interaction – Babcock Ranch 4
 Site located north of
Caloosahatchee Rive...
Conceptual Plan
Groundwater/Surface Water Interaction – Babcock Ranch 5
 19,500 homes concentrated in
“development pods”....
Drainage Plan
Groundwater/Surface Water Interaction – Babcock Ranch 6
 Runoff from developed areas
directed to stormwater...
Lee County Settlement Agreement
Groundwater/Surface Water Interaction – Babcock Ranch 7
 Lee County concerned about wetla...
Modelling Approach
Groundwater/Surface Water Interaction – Babcock Ranch 8
 Integrated model needed to simulate
groundwat...
GSFLOW Code
Groundwater/Surface Water Interaction – Babcock Ranch 9
 GSFLOW is a USGS code developed for
integrated GW/SW...
Grid and Development Plan
Groundwater/Surface Water Interaction – Babcock Ranch 10
 PRMS submodel was used
as a distribut...
PRMS Submodel Parameters
Groundwater/Surface Water Interaction – Babcock Ranch 11
 Four general categories:
▪ Topography
...
PRMS Soil Mapping
Groundwater/Surface Water Interaction – Babcock Ranch 12
 Grouped into 9 categories
▪ Mostly fine sand,...
PRMS Land Cover
Groundwater/Surface Water Interaction – Babcock Ranch 13
 FLUCS data
 Natural cover is mainly
wetland, u...
PRMS Rainfall
Groundwater/Surface Water Interaction – Babcock Ranch 14
 Rainfall shows wet-season/dry
season variation
 ...
PRMS PET
Groundwater/Surface Water Interaction – Babcock Ranch 15
 ET is very high year-round
 Averages about 1323
mm/yr...
PRMS Results
Groundwater/Surface Water Interaction – Babcock Ranch 16
 PRMS outputs daily values for Precipitation, Inter...
PRMS Results
Groundwater/Surface Water Interaction – Babcock Ranch 17
November 2007 Rainfall August 2007 Rainfall
PRMS Results
Groundwater/Surface Water Interaction – Babcock Ranch 18
August 2007 Overland Runoff August 2007 Cascade Flow...
PRMS Results
Groundwater/Surface Water Interaction – Babcock Ranch 19
August 2007 Infiltration August 2007 GW Recharge (af...
PRMS Results
Groundwater/Surface Water Interaction – Babcock Ranch 20
August 2007 2007 GW Recharge - Natural
(Less RO, mor...
Groundwater Submodel
MODFLOW Calibration Targets
Groundwater/Surface Water Interaction – Babcock Ranch 22
 13 significant streams
 10 gages w...
MODFLOW Calibration Targets
Groundwater/Surface Water Interaction – Babcock Ranch 23
 155 wells with water level
data
 M...
Existing Structures
Post-Development Features
Groundwater/Surface Water Interaction – Babcock Ranch 25
 130 Storm Water Ponds
 130 Wetland P...
GSFLOW Submodel Results
Groundwater/Surface Water Interaction – Babcock Ranch 26
 Groundwater model outputs daily values ...
GW Calibration
Groundwater/Surface Water Interaction – Babcock Ranch 27
 Simulated average wet
season heads versus
observ...
GSFLOW Streamflow Calibration Results
Groundwater/Surface Water Interaction – Babcock Ranch 28
 Simulated
(blue) and
Obse...
Wetland Stage Calibration Results
Groundwater/Surface Water Interaction – Babcock Ranch 29
 Simulated
(blue) and
Observed...
GSFLOW Results
Groundwater/Surface Water Interaction – Babcock Ranch 30
August 18, 2008 Streamflow August 19, 2008 Streamf...
GSFLOW Results
Groundwater/Surface Water Interaction – Babcock Ranch 31
 Best seen as animation.
 Shows rainfall, heads,...
GSFLOW Results
Groundwater/Surface Water Interaction – Babcock Ranch 32
 Detailed daily water budgets for each
cell for a...
GSFLOW Results
Groundwater/Surface Water Interaction – Babcock Ranch 33
 Simulated wetland
hydroperiod
 Ranges between 1...
GSFLOW Prediction Results
Groundwater/Surface Water Interaction – Babcock Ranch 34
 Simulated flow under current and post...
GSFLOW Prediction Results
Groundwater/Surface Water Interaction – Babcock Ranch 35
 Simulated wetland stage under current...
Area 3
Area 1 (Curry Lake)
Area 2
Wetland Stage Hydrographs
Natural, Post-development, and Current Conditions
GSFLOW Predictive Simulations
Groundwater/Surface Water Interaction – Babcock Ranch 37
 Simulated 5-yr, 25-yr and 100 yr ...
Conclusions
Groundwater/Surface Water Interaction – Babcock Ranch 38
 Integrated modelling is a
powerful tool for evaluat...
Upcoming SlideShare
Loading in …5
×

Analysis of Groundwater/Surface Water Interaction at the Site Scale Babcock Ranch Community Development Lee County, Florida

457 views

Published on

For more information about our work please feel free to visit our website at http://earthfx.com/

Published in: Engineering
  • Be the first to comment

  • Be the first to like this

Analysis of Groundwater/Surface Water Interaction at the Site Scale Babcock Ranch Community Development Lee County, Florida

  1. 1. Analysis of Groundwater/Surface Water Interaction at the Site Scale Babcock Ranch Community Development Lee County, Florida E.J. Wexler, P.J. Thompson G.F. Rawl, Dirk Kassenaar IAH-CNC 2015 Waterloo, ON November 4, 2015
  2. 2. Babcock Ranch Development Groundwater/Surface Water Interaction – Babcock Ranch 2  Land purchased in 1914  Located on Florida west coast  Straddles Lee and Charlotte Counties  Babcock Ranch City to have 45,000 residents  First fully solar-powered city in U.S.
  3. 3. Location West Coast of Florida North of Ft. Myers.
  4. 4. Babcock Ranch Location Groundwater/Surface Water Interaction – Babcock Ranch 4  Site located north of Caloosahatchee River near Ft. Meyers, FL  Telegraph Swamp is a key wetland feature  Sold to state in 2006 as a Nature Preserve  1100 km2 Study Area includes Babcock Ranch, Telegraph Swamp and subwatersheds to either side Babcock Ranch Model Boundary Callosahatchee River Telegraph Swamp
  5. 5. Conceptual Plan Groundwater/Surface Water Interaction – Babcock Ranch 5  19,500 homes concentrated in “development pods”.  Four residential villages and five hamlets  Other light industry and commercial  50% of developed area to be left as nature reserve
  6. 6. Drainage Plan Groundwater/Surface Water Interaction – Babcock Ranch 6  Runoff from developed areas directed to stormwater lakes  Overflow to wetland preserves  Some runoff directed to treatment marshes  Aggregate mines converted to larger stormwater lakes  Remaining discharge to streams going offsite  Seepage from stormwater lakes re-hydrates wetlands
  7. 7. Lee County Settlement Agreement Groundwater/Surface Water Interaction – Babcock Ranch 7  Lee County concerned about wetlands and possible flooding in Telegraph and Trout Creek downstream of Babcock Ranch.  Wanted proof that stormwater management system will restore more “natural” (pre-settlement) conditions Telegraph Creek
  8. 8. Modelling Approach Groundwater/Surface Water Interaction – Babcock Ranch 8  Integrated model needed to simulate groundwater-fed wetlands and ET  Earthfx built an integrated GW/SW model for:  “Current Conditions”  “Post-development” conditions - increased imperviousness and stormwater management ▪ “Natural Conditions” – all ditches, berms, mines, roads removed  Compare infiltration, storm flow, groundwater recharge, heads, and wetland hydroperiod under each scenario. GSFLOW Code used for integrated Model
  9. 9. GSFLOW Code Groundwater/Surface Water Interaction – Babcock Ranch 9  GSFLOW is a USGS code developed for integrated GW/SW modelling  Based on MODFLOW-NWT and PRMS (Precipitation-Runoff Modelling System)  Fully open-source, proven and very well documented ▪ PRMS submodel handles soil moisture accounting and groundwater recharge ▪ Groundwater submodel provides water to soil zone in areas of shallow water table  Groundwater/surface interaction simulated for lakes and streams PRMS Submodel in GSFLOW
  10. 10. Grid and Development Plan Groundwater/Surface Water Interaction – Babcock Ranch 10  PRMS submodel was used as a distributed model  Calculates soil water balance for each 100 x 100 m cell.  Same grid used for MODFLOW submodel  Overland runoff routed between cells using cascading flow  Runoff can re-infiltrate downslope PRMS Submodel in GSFLOW
  11. 11. PRMS Submodel Parameters Groundwater/Surface Water Interaction – Babcock Ranch 11  Four general categories: ▪ Topography ▪ Soil Properties ▪ Land Use/Vegetation ▪ Climate  Topography from LIDAR and USGS data ▪ Total elevation change: 55 ft  Soil properties from mapping ▪ % impervious, vegetation type, CN values, cover density based on land use/cover mapping Topography
  12. 12. PRMS Soil Mapping Groundwater/Surface Water Interaction – Babcock Ranch 12  Grouped into 9 categories ▪ Mostly fine sand, but poorly drained – B/D soils ▪ Muck/Organic soils in wetlands  High runoff during wet season (May-September) due to high water table  Better drained in dry season (October-April) Soils
  13. 13. PRMS Land Cover Groundwater/Surface Water Interaction – Babcock Ranch 13  FLUCS data  Natural cover is mainly wetland, upland forest, and rangeland  Agriculture is the primary land use ▪ Limited urban development in south  Cover type modified for “post-development” and “natural” conditions Land Use
  14. 14. PRMS Rainfall Groundwater/Surface Water Interaction – Babcock Ranch 14  Rainfall shows wet-season/dry season variation  Rainfall also shows year-to-year variation  Averages about 1370 mm/yr Annual Rainfall Monthly Rainfall NEXRAD
  15. 15. PRMS PET Groundwater/Surface Water Interaction – Babcock Ranch 15  ET is very high year-round  Averages about 1323 mm/yr  Nearly matches average rainfall Annual PET Monthly PET
  16. 16. PRMS Results Groundwater/Surface Water Interaction – Babcock Ranch 16  PRMS outputs daily values for Precipitation, Interception, ET, Hortonian and Dunnian runoff, fast/slow interflow, infiltration, and recharge  Easier to look at Monthly Averages Daily Rainfall WY2006
  17. 17. PRMS Results Groundwater/Surface Water Interaction – Babcock Ranch 17 November 2007 Rainfall August 2007 Rainfall
  18. 18. PRMS Results Groundwater/Surface Water Interaction – Babcock Ranch 18 August 2007 Overland Runoff August 2007 Cascade Flow (in/mon)
  19. 19. PRMS Results Groundwater/Surface Water Interaction – Babcock Ranch 19 August 2007 Infiltration August 2007 GW Recharge (after ET) - Current
  20. 20. PRMS Results Groundwater/Surface Water Interaction – Babcock Ranch 20 August 2007 2007 GW Recharge - Natural (Less RO, more ET) August 2007 GW Recharge (after ET) – Post (Less GW recharge due to impervious)
  21. 21. Groundwater Submodel
  22. 22. MODFLOW Calibration Targets Groundwater/Surface Water Interaction – Babcock Ranch 22  13 significant streams  10 gages with 2-4 years continuous data  505 wetlands represented in current model  Structures at Curry Lake and Telegraph Swamp  All agricultural ditches and berms represented Wells
  23. 23. MODFLOW Calibration Targets Groundwater/Surface Water Interaction – Babcock Ranch 23  155 wells with water level data  Most are in surficial aquifer  All have 2-4 years of continuous data  Shallow wells in wetlands used as surrogates for wetland stage Surface Water Features
  24. 24. Existing Structures
  25. 25. Post-Development Features Groundwater/Surface Water Interaction – Babcock Ranch 25  130 Storm Water Ponds  130 Wetland Preserves  12 Treatment Marshes  121 Structures  Added code to GSFLOW to calculate stage/discharge for weirs, gates, and orifices Surface Water Features
  26. 26. GSFLOW Submodel Results Groundwater/Surface Water Interaction – Babcock Ranch 26  Groundwater model outputs daily values for heads, lake stage/volume, stream stage/discharge.  Data can be analyzed to determine hydroperiod.  Calibration can be done to average heads or to hydrographs Daily Rainfall WY2006
  27. 27. GW Calibration Groundwater/Surface Water Interaction – Babcock Ranch 27  Simulated average wet season heads versus observed
  28. 28. GSFLOW Streamflow Calibration Results Groundwater/Surface Water Interaction – Babcock Ranch 28  Simulated (blue) and Observed (red) flows at three key gages Daily Rainfall WY2006 JEI-570 JEI-567 JEI-569
  29. 29. Wetland Stage Calibration Results Groundwater/Surface Water Interaction – Babcock Ranch 29  Simulated (blue) and Observed (red) stage at three key wetlands JEI-509 JEI-1476 JEI-510
  30. 30. GSFLOW Results Groundwater/Surface Water Interaction – Babcock Ranch 30 August 18, 2008 Streamflow August 19, 2008 Streamflow
  31. 31. GSFLOW Results Groundwater/Surface Water Interaction – Babcock Ranch 31  Best seen as animation.  Shows rainfall, heads, streamflow, wetland and lake depth Click for Animation
  32. 32. GSFLOW Results Groundwater/Surface Water Interaction – Babcock Ranch 32  Detailed daily water budgets for each cell for all inflow/outflow components  Averaged for monthly and annual conditions  Averaged by basin and sub-basins  Results compared with natural and post- construction conditions
  33. 33. GSFLOW Results Groundwater/Surface Water Interaction – Babcock Ranch 33  Simulated wetland hydroperiod  Ranges between 120-365 days  Blue areas are 365 days  Results compared with natural and post- construction conditions
  34. 34. GSFLOW Prediction Results Groundwater/Surface Water Interaction – Babcock Ranch 34  Simulated flow under current and post-development conditions JEI-570 JEI-567 JEI-569
  35. 35. GSFLOW Prediction Results Groundwater/Surface Water Interaction – Babcock Ranch 35  Simulated wetland stage under current, natural, and post- development conditions – general improvement Area 3 Area 1 (Curry Lake) Area 2
  36. 36. Area 3 Area 1 (Curry Lake) Area 2 Wetland Stage Hydrographs Natural, Post-development, and Current Conditions
  37. 37. GSFLOW Predictive Simulations Groundwater/Surface Water Interaction – Babcock Ranch 37  Simulated 5-yr, 25-yr and 100 yr storm at JEI-570 - Improved 5 year Storm 25 year Storm 100-year Storm Natural Post-Development Currrent  100-yr storm at JEI-570 under current, natural, and post-BRC conditions
  38. 38. Conclusions Groundwater/Surface Water Interaction – Babcock Ranch 38  Integrated modelling is a powerful tool for evaluating natural and altered hydrologic response  With sufficient data, very good representations of the groundwater and surface water systems can be obtained  Integrated models can provide quantitative input to land development/storm water management studies Questions?

×