User Forum of Software BASEMENT

BHW

User

Registered: 2015-08-17

Posts: 3

How to calculate flow in QGis

Hello,
I am wondering if it is possible to measure the discharge water of a section with QGis. I tried it with Crayfisch and Profiletool and doesn't find a solution.

Regards.

Florian Hinkelammert

Developer

Registered: 2014-09-09

Posts: 2

Re: How to calculate flow in QGis

Hi BHW,

This can be done in BASEMENT - but not in Postprocessing using QGIS/Crayfish.

Before starting your simulation, you have to define nodestrings - called 'stringdefs' - in the command file and activate 'stringdef_history' as output.
There are several output options for stringdef_history, for example the water discharge, the sediment discharge mean velocity or mean water surface elevation.

Would this work for you?

BHW

User

Registered: 2015-08-17

Posts: 3

Re: How to calculate flow in QGis

OK,
I wanted to try to show the evolution of the water discharge during the animation generate by Crayfisch but I will find an other solution.

Thanks for the answer.

UP

User

Registered: 2025-03-23

Posts: 14

Re: How to calculate flow in QGis

"Before starting your simulation, you have to define nodestrings - called 'stringdefs' - in the command file and activate 'stringdef_history' as output.
There are several output options for stringdef_history, for example the water discharge, the sediment discharge mean velocity or mean water surface elevation."

Do we need to first define the nodes for the cross-section as defined as for inflow and outflow and define in special output to get the discharge at a cross-section? I saw stringdef and stringdef_values on special output options.

Lukas Vonwiller

Developer

Registered: 2014-09-04

Posts: 136

Re: How to calculate flow in QGis

yes, you have to define a stringdef to get the stringdef_history results.