Knowles Engineering Software

Computer Programs for Civil and Environmental Engineers.

ExFilt version 3:

A program for calculating the drawdown times for saturated flow condition in storm water ponds and exfiltration systems Using the Simplified Analytical Method.


ExFiltV3 (ExFilt version 3) is a program that calculates the drawdown time of water in storm water ponds and exfiltration systems under saturated flow or ground water mounding conditions.  It uses the Simplified Analytical Method to make this calculation.

The program has been reviewed by the St. Johns Water Management District of Florida and added to their list of approved programs.

P.O Box 16932

Jacksonville, FL 32245-6932

To contact us:

Phone: 904-725-9513