Download the CES/AES Standalone software!
Any software that is made available to download from this server ("Software") is the copyrighted work of the Environment Agency, Scottish Government, Rivers Agency Northern Ireland and Wallingford Software Ltd. and/or their suppliers. Use of the Software is governed by the terms of the end user licence agreement, which is included with the Software ("End User Licence Agreement “ or “EULA"). An end user will be unable to install any Software unless he or she first agrees to accept the terms of the EULA.
- CES User Manual (pdf,
- AES User Guide (pdf,
- Afflux Advisor: User Guide and Technical
- CES Development supporting documentation
- AES Development
Frequently Asked Questions
Roughness and conveyance - technical questions
Q: How is the unit roughness
exactly is the definition of "conveyance"?
Q: Will the unit roughness
value be larger or smaller than the Manning n values?
Q: How do I convert from
a unit roughness value to a Manning n value?
Q: Is it necessary to have a value for all the components making up the unit roughness value?
Q: If the spatial roughness
description is altered, will this influence the cross-section
Q: Does the CES/AES take
account of losses due to changes in shape of consecutive
you explain how the effect on flood level of local
retention of in-stream habitat / plants can be estimated?
is there no time varying roughness for some of the
Q: Are the CES/AES water
levels appropriate for tidally influenced rivers?
Q: Can the CES/AES be
used for alluvial streams?
is the link to the River Habitat Survey, and its
Backwater technical questions
the flow in a section go super-critical?
I view my bank markers on the plot of the longitudinal
section they are not at the correct section locations
- why is this?
Q: In some instances
when I plot a backwater, with the same inputs as before, I get different results – why
I run the backwater calculations, in some instances,
the cross-section user entered slopes are updated – why
AES technical questions
Q. What exactly is the definition of "afflux"?
Q. How can the effect of waterway blockage be estimated ?
Q. What is the correct way to add a structure to a river reach?
Q. Why can’t I
telephone someone for support in using the CES/AES Stand-alone that I’ve
The CES/AES Standalone and Afflux Advisor
are provided “as
is” and are not formally supported. However,
users are welcome to submit general feedback, issues
and questions to: email@example.com and
we will respond where possible.
that new users should attend a training
A standard one day training course in the use of the CES/AES Standalone is available. This is run periodically at HR Wallingford and can be held elsewhere by arrangement.
For further information on the standard one day training course as well as dedicated courses tailored to specific applications (e.g. channel maintenance, scheme design, flood risk), please contact Caroline Hazlewood.
Last updated: June 2013