FREEWAT (FREE and open source tools for WATer resource management) is an HORIZON 2020 project financed by the EU Commission under the call WATER INNOVATION: BOOSTING ITS VALUE FOR EUROPE.

http://www.freewat.eu/

thank you very much sir.

What types of pollutants are looking to model?

Benjamin Blair Sir, I want to simulate the pollution and other environmental factors in a area. Like NOx, SOx emissions, Wastewater contaminant increment......... after modelling I want to develop models for each of those factors can be optimized. So what will be the better choice for starting my work?

For air pollution, AERMOD from the USEPA is widely used, however, it has a high learning curve. SWAT also from the USEPA could be used for soil and water assessments, but again has a high learning curve. I appreciate that you want to try and consider several complex pollutants (maybe consider a life cycle assessment, if this is the case) but possibly limiting your evaluation to a smaller set of pollutants may be a good place to start before selecting models.

https://www.epa.gov/scram/air-quality-dispersion-modeling-preferred-and-recommended-models

https://cfpub.epa.gov/si/si_public_record_Report.cfm?Lab=&dirEntryID=2921

Benjamin Blair Sir, thank you very much for your support. I will knock you again in any need if you don't mind, sir.