HydroBASINS lev08 watershed · #2080381300
Bassin de Bocholter Aa
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 6 administrative regions across 2 countries : Aalten, Borken, Coesfeld, Oude IJsselstreek, Wesel +1
Sub-basin area
517,2km²
Upstream area
517,2km²
Discharge
5,05m³/s
Mean elev.
44m
Administrative coverage
Species present
5 249 distinct species · 246 870 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Graphe en cours d’indexation
Calcul du tissu écologique de cette entité.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).
Hydroclimate (BasinATLAS lev08)
Mean T°
9,6°C
Annual rain
790mm
Moisture idx (CMI)
0,09
Runoff
309mm/an
PET
717mm
AET
561mm
Mean slope
0,6°
Water table
61cm
Forest
6%
Crops
38%
Urban
14%
Protected
44%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)