User Forum of Software BASEMENT

sajjad

User

Registered: 2014-10-01

Posts: 102

problem with zhydrograph boundary condition

Hi,

I am trying to set up a simulation by using zhydrograph bc for a physical model in which flow invades the domain from a reservoir. I have the water depth as a function of time at a pt located inside the reservoir, named point 'A'. For the sake of zhydrograph bc, I add to the bed elevation of pt A (denoted as zb) the water depth series to get water surface elevation as fn of time. However, for one particular value of zb=7.605, the zhydrograph simulation fails while for zb=7.62, the simulation is a success.
I am copying below the relevant part of the log file for diagnosis of the problem
{
Warning at the definition of the boundary serie.
   The simulation time (t = '60') is longer than time serie (tmax = '59.8002').
    The values of the time serie are assumed constant after the last time.
-> OpenMP: Computation is executed sequentially
-> BASEplane: Computed first time step delta_t = 1
-> Domain: Starting time loop
TIME =  0.000000e+000    hyd. Time Step =   1.000000e+000 (SD: urbDist)
Qout[1]     = 0.000000e+000 [m3/s] (Inflow)
Qout[2]     = 0.000000e+000 [m3/s] (Outflow)
TIME =  1.015024e+002    hyd. Time Step =   1.000000e+002 (SD: urbDist)
Qout[1]     = -6.562144e-007 [m3/s] (Inflow)
Qout[2]     = 0.000000e+000 [m3/s] (Outflow)
-> Domain: Run Time of the simulation= 0.749 sec
-> Domain: Finished simulation.
}
as u can see, the time step is so big that an interval of 100 seconds is traversed so that t becomes greater than the length of the simulation so the simulation stops.

Would appreciate any help in this regard.

Thanks

Lukas Vonwiller

Developer

Registered: 2014-09-04

Posts: 130

Re: problem with zhydrograph boundary condition

Hi Sajjad

It looks like you have no inflow.
The time step is getting bigger because you have a dry domain and therefore nothing to compute.

Hope this helps!
Best, Lukas