User Forum of Software BASEMENT

BASEMENT
Basic Simulation Environment for computation of environmental flow and natural hazard simulation
Laboratory of Hydraulics, Hydrology and Glaciology (VAW)
ETH Zurich
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#1 2016-08-02 13:48:10

0Davinci0
User
Registered: 2016-08-02
Posts: 4

Warning:At the hydrograph boundary all edges are...

Hello,

I am modelling a little stream with a high gradient. A lot of Warnings (180.000 and more are coming) while Basement is working.
The cells in my system are very small.

WARNING -> At the hydrograph boundary all edges are set inactive (not wetted), but
   the inflow is bigger than 0.0. Either the cells in the boundary cross
   section are too big or the inflow is too small to ensure that at least one
   element is wetted.

Finally Basement crashes.
This is my Inflow:
#TIME    VALUE
0    0
900    0.186335404
1800    0.751552795
2700    0.416149068
3600    0.540372671
4500    0.459627329
5400    0.472049689
...
14400    0.01863354
15300    0.01242236
16200    0.00931677
17100    0.00621118

I hope someone can help me.

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#2 2016-08-02 14:07:41

Lukas Vonwiller
Developer
Registered: 2014-09-04
Posts: 130

Re: Warning:At the hydrograph boundary all edges are...

Hi Davinci,
Try to decrease your minimum_water_depth and make sure to apply an appropriate roughness.
Hope this helps!
Br, Lukas

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#3 2016-08-04 10:27:47

0Davinci0
User
Registered: 2016-08-02
Posts: 4

Re: Warning:At the hydrograph boundary all edges are...

Thank you for your answer. I´ve worked out another solution. Because I´ve got a high gradient and a relative small Q I have to build a flat terrain in the front of my model. So I reach the minimum water depth value of 5 cm.

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