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TOPIC: Can I simualte the flow in a complicated river net?

Can I simualte the flow in a complicated river net? 5 years 1 month ago #34680

  • exatto
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The problem is complicated as following:
1. the river net is composed by 120 reaches
2. some of the reaches can be dry during the simulation
3. some storage areas should be considered
Can I use mascaret super-critical model to simulate the flow in this complicated river net?
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Can I simualte the flow in a complicated river net? 5 years 1 month ago #34683

  • c.coulet
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Hi
120 reaches is a large number of reaches. This will be a huge model...
You cannot mix storage areas and dry reaches as the supercritical kernel doesn't allow to use storage areas.

With a so huge model, it's ambitious to use super-critical kernel as the time computation will probably be really important.
Is it necessary?
Are you simulating a dam break?
Otherwise you you envisage to use the unsteady kernel with maybe local adaptation for dry reaches

Regards
Christophe
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Can I simualte the flow in a complicated river net? 5 years 1 month ago #34690

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Thanks a lot!
The only reason that I choose super-critical kernal is that some reaches in the river net could be dry at certain moment, I didn't simulate dam break.
If the unsteady kernal can be used to treat dry reaches with local adaptation, I think it is a good news for me! then how to invoke local adaptation in Mascaret? I don't know how to set this configure.
I need your help!
Best regards!c.coulet wrote:
Hi
120 reaches is a large number of reaches. This will be a huge model...
You cannot mix storage areas and dry reaches as the supercritical kernel doesn't allow to use storage areas.

With a so huge model, it's ambitious to use super-critical kernel as the time computation will probably be really important.
Is it necessary?
Are you simulating a dam break?
Otherwise you you envisage to use the unsteady kernel with maybe local adaptation for dry reaches

Regards
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Can I simualte the flow in a complicated river net? 5 years 1 month ago #34691

  • exatto
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Image4.png


My case is that, there are storage areas in a complicated river net, when there is a big flood coming, when the water level is high enough, then the water will flow into the storage areas from the links, and the terrible part is that sometime there are dry reaches in the river net.
Can I just choose the Unsteady kernal then treat the storage areas and dry reaches at the same time?
I am eagering for your message!
Best regards!
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Can I simualte the flow in a complicated river net? 5 years 1 month ago #34693

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To use the unsteady kernel you should adapt the model to ensure there is no dry reaches.
This means you could slightly modify the bottom of the cross section to have a small part which could always have water.

Hope this helps
Christophe
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Can I simualte the flow in a complicated river net? 5 years 1 month ago #34695

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Thanks a lot, so there are much work should be done to improve the mascaret model.
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