HydroBASINS lev08 watershed · #2080410160
Bassin de Wahnbach
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 : Altenkirchen (Westerwald), Bonn, Neuwied, Oberbergischer Kreis, Rhein-Sieg-Kreis +1
Sub-basin area
283,5km²
Upstream area
2 054,2km²
Discharge
21,32m³/s
Mean elev.
181m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Brüchelsiefen326 km²
- Bassin de Hillenbach209 km²
6 dept-equivalent regions (GADM L2)
- 255.2 km²89.7% of basin
- Neuwied19.9 km²7.0% of basin
- Bonn4.7 km²1.7% of basin
- Altenkirchen (Westerwald)3.6 km²1.3% of basin
- 1.1 km²0.4% of basin
- 0.0 km²0.0% of basin
30 intersecting protected areas
Landscape Protection Area
51.12 km² overlap
Landscape Protection Area
39.77 km² overlap
LSG-Pleiser Huegelland
IUCN VLandscape Protection Area
25.28 km² overlap
NSG Siebengebirge <SU>
IUCN IVNature Reserve
11.57 km² overlap
Siebengebirge
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.17 km² overlap
LSG-Sieg-/Aggeraue
IUCN VLandscape Protection Area
8.56 km² overlap
Landscape Protection Area
6.89 km² overlap
LSG Staatsforst Sieg
IUCN VLandscape Protection Area
4.62 km² overlap
NSG Siegaue
IUCN IVNature Reserve
4.02 km² overlap
21 more protected areassorted by overlap area
NSG Hanfbach und Zufluesse
IUCN IVNature Reserve
3.83 km² overlap
Landscape Protection Area
3.09 km² overlap
LSG-Siegaue
IUCN VLandscape Protection Area
2.40 km² overlap
NSG Siegaue
IUCN IVNature Reserve
1.61 km² overlap
Sieg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.50 km² overlap
Basaltsteinbrüche Hühnerberg und Eudenberg / Tongrube Eudenbach
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.44 km² overlap
Nature Reserve
1.43 km² overlap
Landscape Protection Area
0.97 km² overlap
Landscape Protection Area
0.87 km² overlap
Siegaue und Siegmündung
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.84 km² overlap
NSG Siegaue <LP Siegmündung>
IUCN IVNature Reserve
0.82 km² overlap
Heiden und Wiesen bei Buchholz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.71 km² overlap
Nature Reserve
0.64 km² overlap
LSG-Wiehl <2.2.1>
IUCN VLandscape Protection Area
0.56 km² overlap
NSG Komper Heide
IUCN IVNature Reserve
0.53 km² overlap
NSG Komper Heide
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.53 km² overlap
Landscape Protection Area
0.50 km² overlap
Nature Reserve
0.49 km² overlap
Nature Reserve
0.39 km² overlap
Nature Reserve
0.37 km² overlap
Nature Reserve
0.29 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 032 distinct species · 71 688 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Wahnbach : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 126 interactions GloBI sur 6 types (connectance 22.5%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
9,3°C
Annual rain
795mm
Moisture idx (CMI)
0,06
Runoff
281mm/an
PET
741mm
AET
581mm
Mean slope
3,6°
Water table
289cm
Forest
39%
Crops
16%
Urban
47%
Protected
61%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)