open TELEMAC-MASCARET The mathematically superior suite of solvers

Good morning everyone,

First of all, I would like to thanks all the telemac community for the support avaible online which helped me a lot on the simulation I have been doing so far.

I’m still novice using Telemac2D and my fortran skill doesn’t allow me to understand fully how the subroutines works. However I have slowly started working on harder project for which I would be glad to hear some feedback from the community.

I’m currently doing a simulation of flooding plains alongside a river in a periurban environment. The first simulations were successful as there was no real specific difficulty. However, I realized that the area of the project is intercepting a upstream watershed. In order to fully describe the flooded area I would like to integrate the water coming from this watershed.

My first idea was to use the rainfall-runoff subroutine available. However I do not have any topographic data of the upstream watershed so I couldn’t add it to my domain.

My second idea was to create a new boundary with prescribed flowrates at the frontier of the domaine where the watershed is intercepted by my project. This would have allow me to add an inflow to the domain using the hydrogram file and studying the watershed independently from the simulation. Unfortunatelly this doesn’t seem to work as my boundary is dry at the beginning of the simulation and resulting in error during the calculation « GIVE A VELOCITY PROFILE IN THE BOUNDARY CONDITIONS FILE OR CHECK THE WATER DEPTHS. »

Finally, going through the manual I have been able to add this inflow by creating a source file. This allow the simulation to work, however reading carefully the manual I notice that the development team doesn’t recommend to set up source at the boundaries of the domain. That’s why I asking the community some support today. Did anyone already face such case ? Is there any solution to add inflow to simulate the input of intercepted watershed ? Is using a source at the boundary or near the boundary acceptable in such case ?

If needed, I can send the file I’m working on or send a general diagram of the domain to illustrate my issue.