We have used quite often HEC GEO-RAS for modelling large rivers.
It is not extremely easy to use, because of some few minor bugs, however it is powerful.
We have just tested RIVER CAD last week.
I confirm Colin's opinion :
- if you already use ARC GIS please go for HEC GEO-RAS ( it's free )...
I agree with what indicate by blueoak even if we have just startes our tests for dam break analysis.
We have already used HEC-RAS 4.0 for a culvert modelling and works fine.
Antonio Pietrangeli
Studio Pietrangeli
www.pietrangeli.it/Presentazione.html
The most comprehensive books on PH design is the followings series :
- Civil Engineering Guidelines for Planning and Designing Hydroelectric Developments
ASCE 1989
If you go on the ASCE web site
http://www.pubs.asce.org/
you can buy a fac-simile copy ( they're out of print ) of these...