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  • airGRiwrmairGRiwrm
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  • #51
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Issue created Jul 01, 2021 by Dorchies David@david.dorchiesOwner

Handle simple in-line reservoir inside the model

Until now, reservoirs are handle through direct injections and only upstream nodes can be direct injections.

As a result, catchment with online dams like the Pannecière Lake are currently complicated to integrate in the GRiwrm structure.

Here's below the situation of the Pannecière Lake:

graph LR
P(PANNECIERE)
CHAUM_07 -->|0km| P
P --> |153km| GURGY_02
style P fill:#99f

And it's representation in airGRiwrm:

graph LR
CHAUM_07 --> |153km| GURGY_02
PANNEC_P --> |153km| GURGY_02
PANNEC_R --> |153km| GURGY_02
style PANNEC_P fill:#fcc
style PANNEC_R fill:#fcc

Because of the unicity of the network, we have to first manually simulate the upstream basin, copy it's value multiplied by -1 into the intake of the lake (PANNEC_P) in order to annihilate the upstream influence and only routing the release of the lake (PANNEC_R) downstream.

A solution could be to keep the first scheme above and use a "direct injection" node which will simply returning the flow provided in Qobs for the node corresponding to the dam.

graph LR
CHAUM_07 --> |0km| PANNEC_R
PANNEC_R --> |153km| GURGY_02
style PANNEC_R fill:#fcc

With this simple solution, we can remove simply the preliminary simulation of the upstream part of the dam and the complex step of substracting all of upstream contribution.

Edited Jul 18, 2022 by Dorchies David
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