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I am completely new to creating models but keen to learn.

I am currently running a project to use ADVMs at a fixed point in a river channel to collect velocity data during flood events. I'd like to create a model that will use the inputted X and y velocities, correct them individually based on their position in the vertical (taking into account the changing stage level and other environmental parameters.) I would like to then output the calculated discharge from a stage area rating and the modeled mean velocities. A graphical output of the velocity structure changing over time would also be good to create.

I was hoping that someone would be able to point me in the correct direction and give me a bit of a hint as to the subroutines I should be using/amending to make this work as well as anything else I should be aware of (pitfalls, helpful literature, etc)

Having read the manuals I have only seen subroutines for entering a rating curve, as we are collecting data at sites previously unrated this isn't possible.

I'm sure this is a very simple model but as a complete newbie I would very much appreciate any help that could be offered to get me started in the right direction.

Thank you.

Hello

I'm not sure I've understood exactly what you want to do but:
1- When you will manage velocities in the vertical direction at a fixed point, this will need to handle 3D model rather than 2D.
2- If you want to use measured velocities (ADVM?) to prescribe them to the model, this seems more like a data assimilation problem where people 'correct' the computed values located in the vicinity of observations points (measures) in order to smoothly 'force' the model to follow these measures. If this this the case, this will be outside the scope and the capabilities of Telemac

I hope that this helps

with my best regards

Riadh ATA

Thank you Riadh for your reply, just to clarify my intentions. I am collecting velocities at set time intervals in a river channel with a surveyed cross section. As the stage would change I wanted the velocities corrected for their position in the vertical via a log law taking into account turbulence etc. Those corrected velocities would be averaged and multiplied by the stage area to to provide a theoretical discharge and a velocity structure within the channel for each time stamp. Velocities are measured across the channel using a horizontal acoustic doppler so they are always at the same stage level/fixed points.
I have done this in a basic form in excel but was hoping that using this modelling software would provide a more professional and easier way to carry out the calculations.

If this is beyond the scope of Telemac do you know of any other program that could help me?

Many thanks,
Mark

Hello Mark

Sorry, I can not help. This is a matter of experimental fields. I guess that people who are working with lobaratory reduced (physical) models could help.

Good luck

Riadh

Hello,

one of the most useful websites for this kind of tasks is:
hydroacoustics.usgs.gov
There you find software, documents and a forum related to ADCPs and ADVMs.

Best regards,
Clemens