User Forum of Software BASEMENT / Hydraulics

Qlateral

dummy@example.com (Bianca) — Wed, 23 Oct 2024 06:56:37 +0000

For everyone encountering the same difficulty: The solution was, that the cross section where the qlateral is applied to cannot be dry at the time of qlateral starting.

Error related with gate as inner boundary

dummy@example.com (Yang He) — Sun, 30 Jun 2024 16:27:18 +0000

Hi Lukas,

Thanks for the suggestion. After I open up the gate, the model is running successfully now.

Best regards,
Yang

qlateral

dummy@example.com (Matthias Bürgler) — Wed, 12 Jun 2024 08:34:45 +0000

Hi,

It seems that the EXTERNAL_SOURCE is missing the tag 'cross_section'.

Best regards,
Matthias

ERROR -> Newton-iteration to calculate water surface elevation (z)

dummy@example.com (nicolas) — Fri, 26 Jan 2024 14:33:24 +0000

Hi Lukas,

Yes, you are right! I set the slope of the downstream boundary condition to high.
Now the hydraulic model works well.

Thank you for your help, I wouldn't have looked there otherwise.

Best, Nicolas

simple channel with weir DS boundary

dummy@example.com (Alyssa) — Wed, 29 Sep 2021 16:31:09 +0000

Hi Matteo

Thanks for the advice. It is what I did in the end, with an inner boundary dam far away. with the downstream boundary condition it doesn't work.

best wishes
Alyssa

1D hydraulic modelling of natural channel with weir

dummy@example.com (huangvy) — Sat, 19 Sep 2020 08:36:48 +0000

I have tried to add the line, However, it still collapsed without any information.

Matteo Facchini wrote:

Try to add this header to the file if you do not have it already:
#TIME [s]	VALUE

Instability Q over weir

dummy@example.com (Alyssa) — Thu, 11 Jun 2020 16:31:42 +0000

I solved this problem. I turns out the cross sections in between I defined the weir were too far apart and this created instability in the discharge..

Change of Poleni weir coefficient in side weir model (off_channel)

dummy@example.com (Matthias Bürgler) — Wed, 20 May 2020 06:25:04 +0000

The Poleni factor change be defined by the user. In BASEMENT you find it under the name "weir_my".

Best regards
Matthias

About “Upstream_direction” STRINGDEF

dummy@example.com (Matteo Facchini) — Tue, 12 May 2020 07:56:58 +0000

Hi Roberto,

put yourself on the first node of the stringdef,
look at the second node of the stringdef,
find out whether "upstream" is on your right or left.

...and you find out the correct direction to give to your stringdef!

Cheers

Depth-dependant roughness

dummy@example.com (Matthias Bürgler) — Fri, 24 May 2019 11:39:23 +0000

Hi Max

For capacity reasons the implementation of such a feature is not planned anytime soon.

Maybe it would be interesting for you to run your simulations in batch mode (see BASEMENT User Manual in Chapter 2.4). Integrating this in a batchscript can automatize your simulation process.

Best regards
Matthias

Cross section full of water

dummy@example.com (qtheiler) — Wed, 17 Oct 2018 07:54:50 +0000

Thank's for your confirmation.

Cheers,

fictitious discharge increase in basechain

dummy@example.com (sajjad) — Sat, 21 Jul 2018 17:40:04 +0000

Sorry, some dreadful confusion, so Basement is not at fault but wrong inflow was read in.

Lateral weir in basechain

dummy@example.com (sajjad) — Fri, 05 Jan 2018 12:26:20 +0000

Hi,

I am interested in simulating a side weir in basement 1d version. However, as per my understanding, it is not possible as inner_boundary (weir) only works in the flow direction and not sideways in the basechain.

In fact, i need something like 'off-channel' or 'qlateral' available in source block but I also need basement to solve weir equation over the edges which it does not in the source block.

Would like more learned to guide me by confirming or denying what i just stated.

Regards

Inner boundary - gate

dummy@example.com (Gonne) — Tue, 05 Dec 2017 14:17:18 +0000

Hi,
I have a question about the inner boundary condition Gate.
I have a mobile gate which is regulated in order to maintain a constant level upstream.
In particular I have to control the gate openings with the upstream water surface elevation.
How can I do that? What conditions should I use?
For the moment I use the following conditions:

Type: Gate
Cross_section_name_1: 908.11
Cross_section_name_2: 908.1
Gatee_type: radial_gate_with_flap
Gate_size_file: ?
Gate_level_file: ?
Width_file: (constant)
Gate_my: 0.65 (default value)
ehaed_reference_location: 908.11
Gate_bottom_level: 153
gate_bottom_fac: 0.79 (default value)
calculation_type: standard

I don't understand the command "gate_size_file" and "gate_level_file".
How can I solve my problem in order to maintain a constant level upstream and a variable discharge (and gate opening) as outflow?

Thank you for your help

hq-relation as Outflowboundary

dummy@example.com (davidz) — Fri, 24 Mar 2017 07:46:16 +0000

I could solve the problemn myself.. i firt generated a simple geometry with the gege.py and found then out, that the elevations musst be corresponding to the wse_[m_asl].
with that hint i changed my boundary files again that H[m] corresponds to the wse_[m_asl] and found out, that when i tried that out earlier i had a mistake in the elevations... Too bad now it works fine in V2.7.

have a nice day.