HydroBASINS lev08 watershed · #2080419390
Bassin de Lahn
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 7 administrative regions : Gießen, Hochtaunuskreis, Lahn-Dill-Kreis, Limburg-Weilburg, Rheingau-Taunus-Kreis +2
Sub-basin area
855,1km²
Upstream area
4 206,1km²
Discharge
37,8m³/s
Mean elev.
303m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Lahn1001 km²
- Bassin de Dill718 km²
7 dept-equivalent regions (GADM L2)
- 396.4 km²46.2% of basin
- 291.4 km²34.0% of basin
- 156.8 km²18.3% of basin
- 7.8 km²0.9% of basin
- 4.3 km²0.5% of basin
- 1.3 km²0.2% of basin
- 0.1 km²0.0% of basin
30 intersecting protected areas
Hoher Westerwald
IUCN Not ReportedSpecial Protection Area (Birds Directive)
25.96 km² overlap
Waldgebiet östlich von Allendorf und nördlich von Leun
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
22.12 km² overlap
Auenverbund Lahn-Dill
IUCN VLandscape Protection Area
21.63 km² overlap
Lahntal und seine Hänge
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
21.47 km² overlap
Kreuzberg und Kahlenbergskopf bei Obershausen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.98 km² overlap
Heiligerwald-Blessestein-Eichenkopf
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.39 km² overlap
Feldflur bei Hüttenberg und Schöffengrund
IUCN Not ReportedSpecial Protection Area (Birds Directive)
7.26 km² overlap
Feldflur bei Limburg
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.08 km² overlap
Wald und Schiefergruben bei Langhecke und Klein-Weinbach
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.16 km² overlap
21 more protected areassorted by overlap area
Weinberg bei Wetzlar
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.83 km² overlap
Kallenbachtal zwischen Arborn und Obershausen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.74 km² overlap
Weinberg bei Wetzlar
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.61 km² overlap
Spitzberg, Gackenberg und Tongruben von Hintermeilingen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.47 km² overlap
Waldgebiete südwestlich von Weilmünster
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.42 km² overlap
Ulmbachtal und Wiesen in den Hainerlen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.40 km² overlap
An den Fußwiesen bei Grävenwiesbach
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.37 km² overlap
Steinbrüche in Mittelhessen
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.31 km² overlap
Westerwald
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.21 km² overlap
Heidenkopf und Knoten nördlich Mengerskirchen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.18 km² overlap
Wald bei Arnoldshain
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.15 km² overlap
Niedges-,Sau- und Kirrbachtal zwischen Mauloff und Schmitten
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.01 km² overlap
Reifenberger Wiesen, Schmittgrund b. Oberreifenberg mit angr. Fl.
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.74 km² overlap
Lahnwiesen zwischen Burgsolms und Oberbiel
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.73 km² overlap
Nature Reserve
0.70 km² overlap
Nature Reserve
0.62 km² overlap
Wiesen nördlich Lahr
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.51 km² overlap
Heidenhäuschen
IUCN IVNature Reserve
0.44 km² overlap
Heidenhäuschen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.44 km² overlap
Kellerberg bei Nauborn
IUCN IVNature Reserve
0.41 km² overlap
Nature Reserve
0.35 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 473 distinct species · 157 024 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Lahn : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 113 interactions GloBI sur 6 types (connectance 17.0%, filtre Serrano α=0.2). 12 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°
8,5°C
Annual rain
751mm
Moisture idx (CMI)
0,03
Runoff
263mm/an
PET
726mm
AET
554mm
Mean slope
5,6°
Water table
373cm
Forest
44%
Crops
17%
Urban
8%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)