Project Background and Purpose:

• Under contract with Sarasota County, SAI is currently performing a comprehensive drainage investigation and developing a stormwater model of the Upper Myakka River watershed including the Howard Creek Tributary basin.

• The primary objective of the project includes identification of all residential and non-residential structures that are within the 100-year floodplain.

• All conventional survey data was prepared in a specific database format.  Using custom tools SAI was able to import the information directly into the ICPR model.

• GIS based tools were utilized to define overland flow weir interconnections, model runoff parameters and storage.

• The field reconnaissance data, model input data, results, and flood impacts are being managed using a graphical information system (GIS).

 

Stormwater Modeling / Investigation:

• Comprehensive stormwater modeling of the 38 square mile for the upper basin of the Myakka River is being conducted using the FEMA approved ICPR program.

• The watershed is highly rural with pastureland and scattered low density residential subdivisions.

• The intricate system of natural storage areas found throughout the watershed produces a slow recovery time through the drainage network.

• The model includes over 1,000 drainage sub-basins and nodes.  Extensive field reconnaissance and survey was performed to review and inventory the primary drainage infrastructure and document concerns (flooding, maintenance, etc.).

• Modeling involved seven complex bridge structures and a dike/pump system that discharges into the Myakka River.

• Boundary conditions were developed based on historical USGS gage data at the Myakka River.