HydroBASINS lev08 watershed · #2080429670
Bassin de Main
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 10 administrative regions : Darmstadt, Darmstadt-Dieburg, Frankfurt am Main, Groß-Gerau, Hochtaunuskreis +5
Sub-basin area
580,5km²
Upstream area
27 405,1km²
Discharge
207,49m³/s
Mean elev.
198m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nidda1941 km²
- Bassin de Main416 km²
10 dept-equivalent regions (GADM L2)
- 187.2 km²32.1% of basin
- 130.9 km²22.5% of basin
- 64.9 km²11.1% of basin
- 52.5 km²9.0% of basin
- 49.8 km²8.5% of basin
- 47.8 km²8.2% of basin
- 36.3 km²6.2% of basin
- 9.9 km²1.7% of basin
2 moreFull L2 list
- Darmstadt3.1 km² · 0.5%
- Mainz0.0 km² · 0.0%
30 intersecting protected areas
Landkreis Offenbach
IUCN VLandscape Protection Area
38.38 km² overlap
Wiesbaden
IUCN VLandscape Protection Area
36.58 km² overlap
Mönchbruch und Wälder bei Mörfelden-Walldorf und Groß-Gerau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
21.90 km² overlap
Landscape Protection Area
21.89 km² overlap
Landscape Protection Area
17.65 km² overlap
Hessische Mainauen
IUCN VLandscape Protection Area
12.61 km² overlap
Mönchbruch von Mörfelden u.Rüsselsheim u.Gundwiesen von Mörfelden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.84 km² overlap
Nature Reserve
9.41 km² overlap
Mark- und Gundwald zwischen Rüsselsheim und Walldorf
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.53 km² overlap
21 more protected areassorted by overlap area
Wald bei Groß-Gerau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.61 km² overlap
Dattenberg u. Wald westl. Glashütten mit Silber- u. Dattenbachtal
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.47 km² overlap
Buchenwälder nördlich von Wiesbaden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.06 km² overlap
Kranichsteiner Wald mit Hegbachaue,Mörsbacher Grund u. Silzwiesen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.32 km² overlap
Schwanheimer Wald
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.46 km² overlap
Galgenberg bei Diedenbergen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.95 km² overlap
Stadt Darmstadt
IUCN VLandscape Protection Area
2.85 km² overlap
Wald östlich Wildsachsen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.72 km² overlap
Hegbachaue bei Messel
IUCN IVNature Reserve
2.40 km² overlap
Kelsterbacher Wald
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.39 km² overlap
Hangwälder und Felsfluren am Kaisertempel/Martinswand b. Eppstein
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.29 km² overlap
Heidelandschaft westlich Mörfelden-Walldorf mit angrenz. Flächen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.26 km² overlap
Streuobst-Trockenwiesen bei Nauheim und Königstädten
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.83 km² overlap
Untermainschleusen
IUCN VLandscape Protection Area
1.46 km² overlap
Untermainschleusen
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.40 km² overlap
Rossert-Hainkopf-Dachsbau
IUCN IVNature Reserve
1.27 km² overlap
Koberstädter Wald östlich von Langen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.24 km² overlap
Rossert-Hainkopf-Dachsbau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.18 km² overlap
Sandtrockenrasen zwischen Mörfelden und Walldorf
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.02 km² overlap
Falkenberg und Geißberg bei Flörsheim
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.95 km² overlap
Nature Reserve
0.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 866 distinct species · 323 217 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Main : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 105 interactions GloBI sur 6 types (connectance 12.2%, filtre Serrano α=0.2). 8 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°
9,2°C
Annual rain
649mm
Moisture idx (CMI)
-0,16
Runoff
231mm/an
PET
776mm
AET
528mm
Mean slope
3,1°
Water table
199cm
Forest
34%
Crops
11%
Urban
57%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)