open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

Is there a way to elegantly modify at each time step a variable like bottom in a polygon area predefined at the beginning of the simulation ?
The aim is to easily increase or deacrease a weir heigh...

I have ever developped such a solution for a previous study by coupling telemac fortran code with gdal gis library but the code called the spatial function at each time step...wich was not very efficiency.

Is there simpler way to idendify - one time only at the beginning of the simulation - all the "nodes" in a predefined polygon with telemac code and make available this array of nodes for all telemac subroutines ? (wich is equivalent to create somewhere in the code a global variable...)

Best regards,

Fabien