How to read link discharge in a structure (direct discharge on a river network)

[hawklorry]

An example would be great. I tried following code. It didn't work.

queries = QueryDataReach("Discharge", "Fish_Valve_June_1", 0) df = res1d.read(queries)

[JesperGr]

The outputs of the structure is stored in the reach at the chainage of the structure. If the structure is located at "aBranch" at chainage 450, then you should be able to grab the discharge using:

QueryDataReach("Discharge", "aBranch", 450)

[hawklorry]

Thanks @JesperGr. As shown below, there are multiple structures at the same chainage. I'm wondering how we could specify the one that we want to use in the query.

[gedaskir]

If it is not too big of a hassle you could try to use a development implementation of mikeio1d from feature/result_network_auto_completion branch. You can install a feature branch using:

pip install https://github.com/DHI/mikeio1d/archive/feature/result_network_auto_completion.zip

Here I implemented QueryDataStructure, which can be used as:

from mikeio1d import Res1D
from mikeio1d.query import QueryDataStructure
res1d = Res1D('MyRes1D.resd')
query_structure = QueryDataStructure('DischargeInStructure', 'MyStructureId')
df = res1d.read(query_structure)

For now QueryDataStructure has a drawback that it requires all structure IDs to be unique.
Additionally, that branch has auto-completion functionality for Jupyter etc., so now one could add a query using:

from mikeio1d import Res1D
res1d = Res1D('MyRes1D.resd')
res1d.structures.MyStructureId.DischargeInStructure.add()
df = res1d.read()

This should also work for nodes, catchments, reaches. Note that this is still in development so it is not stable :-).

[gedaskir]

Now this functionality is made available as part of MIKE IO 1D v0.3.

[hawklorry]

Perfect. I will try it out. Do we also have a function to get the ids of all structures?

[gedaskir]

You should be able to get the ids of all structures using res1d.structures.

[hawklorry]

You should be able to get the ids of all structures using res1d.structures.

It works well. Thanks for the new updates. It's a time-saver.