Reinhard -

Your "Intermediate Extran Model" is very interesting. As I understand, this is generated by new Fortran Code that reads the RUNOFF.INT file and produces its own .INT file for input to EXTRAN. So then, it routes the runoff to storage based on the storage elevation curve, and routes discharge to EXTRAN based on head-discharge curves. How does it handle nodal flooding beyond capacity of the Storage curve?

I suppose it would be possible to implement the same idea within EXTRAN, using a stoage elevation curve and a pipe connected to the system with a Manning's n equivalent to the loss through the inlet. I am sure you considered this; could you comment on the advantages of the "Intermediate Extran Model"

This sounds like a great tool and I am sure many folks would like to try it. Any possibility of releasing it, for sale or otherwise?

Regards

Ron Kilmartin
ronkilmartin@attbi.com