Tidal condition

Dear all,
I am using Mike 11 to model a river which flows to the sea. I have created tidal boundary conditions using Mike 21 tool box. Tide heights have negative values. However, I want to use tide heights as water level boundary conditions, and water level values cannot be negative.
Please guide me if I can simply use generated tide heights of Mike 21 tool box as boundary conditions (water level) in Mike 11.
Or do I need to change tide heights to positive values?

Regards,
Mahsa

Hi mahsa,

It is no problem for MIKE 11 to have negative values in the boundary conditions! So it is technically possible to keep the current values you have.

What you need to check, is that all your elevation data have the same altimetric reference. That is, cross sections' elevations, structures' elevations and boundary conditions must be expressed with the same reference level.

Best regards,
Mathieu

Hi Mathieu,
Thanks for your helpful information. Yes, I have checked the datum of both river data and tide data. I have changed my tide height data in order to have the same altimetric reference.
Regards,
Mahsa