What do we know about parsen

• parsen interpolates cross section data for a branch when more than one cross section is defined
• cross section data is interpolated for calculation points along the branch
• parsen calculates conveyance based on water level and friction
• parsen calculates the slope/incline between cross sections
• flow area
• hydraulic radius based on wetted area and wetted perimeter

What functionality do we need to reuse

• interpolation (what is interpolated ? YZ, WH or specific shape)
• conveyance calculation (conveyance depends on water level!)

"Conveyance is a quantity that represents the discharge capacity of a river for every water level"

Where do we call specific routines belonging to parsen

• preprocessing / during calculation (water level is not known beforehand, only initial water level)
• user interface ?!