EPANET is a dynamic water distribution system simulation model released by the United States Environmental Protection Agency for both utilities and consultants. It uses the standard node-link relationship common throughout most engineering programs. EPANET was highly received in the market because it was distributed freely, and has what is even today considered to be the industry standard computational engine. It removed the cumbersome Hardy-Cross procedure from models and introduced what is termed "The Hybrid-Gradient Algorithm" that takes the network and writes it into a series of linear equations. EPANET can be used for all kinds of drinking water modelling: Flows in pipes, Pressures at junctions, propagation of a contaminant, chlorine concentration, water age, and even alternative scenario analysis. It can also simulated hourly differences in water demand through the system without difficulty.
EPANET was developed using Delphi (a closed source RAD-IDE developed by Borland), as part of a research project I had at University of Évora (Portugal) I wanted to be able to run EPANET natively on Linux. So I started to port it from Delphi into Lazarus. Since my scholarship has finished and I don't the time to work on this I'm releasing so that someone interested can continue my work.
Since Lazarus didn't support MDI forms I had to make some small adjustments to the interface but this shouldn't prevent anyone which used to EPANET to use it. Many Lazarus bugs were fixed while porting the code, a Charting and i18n systems were also developed.
The are still two missing parts which are import:
EPANET in Lazarus is working ok in Windows but at least the printing system needs to be replaced so it can run in Linux and MacOS.
This port if not in any way affiliated or support by EPA
Anyone interest in finishing this project please contact me to: lfrodrigues at gmail dot com
Here you can download source and executable tarball.