Is your feature request related to a problem? Please describe.

CaMa supports bifurcations in the river network, which requires a more careful treatment in earthkit-hydro. It needs to be possible to supply a splitting ratio for all points (can be a 1d scalar weights array for each edge (NOT node!)). For most functions e.g. sum, mean etc. this is enough. For functions like catchments/percentiles etc. this will have to be a boolean include or don't include

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

No response

Organisation

No response