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South Lee County Watershed Initiative Hydrological Modeling Project

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​Client: Coastal and Heartland National Estuary Partnership (CHNEP)​
​Year: 2020 - 2021
​​
About: 
The South Lee County Watershed Initiative (SLCWI) stakeholders identified the need for a Strategic Hydrological Modeling and Planning project. The purpose was to identify opportunities to restore more natural hydrology that include restoring wetland water levels and hydroperiods.
​Applied Skills:
  • Integrated Modeling: Model updates & improvements
  • Model calibration
  • Scenario evaluations ​
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Consulting Areas:
  • Surface water management
  • Wetland conservation and restoration​​
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Software Applied:
  • ​MIKE SHE / MIKE11
  • ArcMap
  • ​LAGO Toolbox
​Specifics:
A new MIKE SHE/MIKE 11 model was built around South Lee County areas by using the information from other models for the area. The model inputs included updated rainfall, reference ET, topography, landuse coverage, irrigation coverage and rates, flow paths and surface water structures, hydrogeological parameters, and observation data from surface and groundwater monitoring stations. ​
During model calibration, sensitivity tests to different parameters were conducted. Reported irrigation from large agriculture operations were used to adjust model irrigation parameters. Also, the hydraulic conductivities were adjusted by using a proprietary tool (Adjust dfs2 file) to better match the observation data. The calibrated model was used to build a baseline existing conditions model, which was modified to build a pre-development model (also referred to as NSM) and 5 future conditions scenarios.
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Outcome:
The NSM showed lower water depths and hydroperiods in the areas developed. The effect of future proposed projects on hydroperiods and water depths was also evaluated. Increasing temperatures and ET forecasted by year 2050 produced a drier climate, which results in reduction of hydroperiod by 1 month, of wet season water depths by 0.4’, and of river outflows by 15%. Estimated sea level rise will likely result in changes in vegetation along the coastal boundary. The landward migration of brackish tidal water along the rivers (due to higher tidal levels and reduced river outflows) may have negative impacts on the freshwater resources near the coast.  Three landuse change scenarios were also evaluated.   
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Modeling Services
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- Data mining & Processing
- Conceptualization & Setup
- Sensitivity Tests
- Model Calibration
- Model Telescoping
- Design Storm Simulations
- Scenario Evaluations
​- Post-Processing of results
- Peer review
- Model QA/QC
- Mass balance checks
- Fixing numerical instabilities
- Calibration/validation checks
​- Reservoir Storage Modeling
- GIS data mgmt. and tools

Consulting Areas
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- Natural resources planning
- Stormwater management
- Groundwater management
- Surface water structure design
- Water supply planning
- Species and sediment transport
- Salt water intrusion
- Floodplain delineation & management
- Floodway Encroachment Analysis
​- Urban and coastal flooding
- Water quality studies
- Wetland conservation and restoration
- Wellhead protection area delineation
- Landscape ecology
- Water regulations permitting

Featured Software
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MIKE 11
MIKE SHE
MIKE21
ECOLab
MODFLOW
GWV (Vistas)
MODHMS
​GIS-ArcMap

HEC-RAS
​HEC-HMS
EPA-SWMM
​XP-SWMM
ICPR
​RiverFlow2D
WASP
HSPF

Software Development
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Spreadsheet modeling
File format converters
Pre- & post-processing tools
A la carte software (C#, Python, etc)


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