C-43 Reservoir: MODFLOW Modeling

​Client: South Florida Water Management District (sub-consultant to Carollo Engineers)
​Year: 2017-2018
​
About: 
LAGO provided seepage modeling support to the geotechnical studies conducted for the C-43 Reservoir design. LAGO developed seven (7) local MODFLOW models at different locations along the reservoir berm. The resulting steady-state heads from the 3-dimensional groundwater model were provided to the geotechnical experts at Terracon to evaluate slope stability of the canals, uplift pressures beneath structures, etc.

Applied Skills:

• Groundwater Modeling: Data mining and processing
• Model Conceptualization & Setup

​Consulting Areas:

• Groundwater management

​Software Applied:

• MODFLOW (GWV)
• ArcMap
• LAGO Toolbox

Specifics:

• Grid cell size = 10 ft
• Layer Thickness = 2 to 10 ft, from top to bottom
• Geological Model: top and bottom elevation map from kriging interpolation of boring well data 
• Lateral boundary conditions from heads extracted from regional MIKE SHE model
• Bentonite wall in berm, relief trenches, and sheet piling were considered
• Software script developed to process the data into GWV input files
• MODFLOW heads are extracted at specific points of interest by using proprietary software tools.

Outcome:
The results of the 3D groundwater modeling effort were used as input of the geotechnical analysis of the features at the C-43 Reservoir.

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