Documentation hydraulic elements in QGEP (weirs, pumps, bassins)

[sjib]

Make documentation about hydraulic elements in QGEP - see for discussion and draft https://github.com/QGEP/QGEP/issues/579

• [x] Overflows (weirs, pumps) https://qgep.github.io/docs/en/user-guide/How-To/index.html#hydraulic-modeling-of-an-overflow-prank-weir-leapingweir-pump
• [x] Volume description of bassins (with classes hydr_geometry and hydr_geom_relation (German: Hydr_Geometrie / Hydr_GeomRelation) https://qgep.github.io/docs/en/user-guide/How-To/index.html#collecting-a-hydr-geometry-corresponds-to-a-basin-geometry-in-mikeurban

• [x] Overflow characteristics (with overflow_charc (Ueberlaufcharakteristik) and hq_relation (HQ_Relation) and hydr_char_data (Hydr_Kennwerte) - see documentation in Wegleitung GEP-Daten and https://qgep.github.io/docs/en/user-guide/How-To/index.html#overflow-characteristic
• [ ] throttle_shut_off_unit (Absperr_Drosselorgan)

[sjib]

@urskaufmann Is throttle_shut_off_unit (Absperr_Drosselorgan) also documented somewhere? If yes please add link and close.

[sjib]

@urskaufmann reminder: Is throttle_shut_off_unit (Absperr_Drosselorgan) also documented somewhere? If yes please add link and close.