HydroBASINS lev08 watershed · #7080478930
Bassin de Twelvemile Creek
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 3 administrative regions across 2 countries : Erie, Lake Erie
Sub-basin area
352,6km²
Upstream area
664 193,3km²
Discharge
9 719,39m³/s
Mean elev.
202m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Elk Creek3385 km²
- Bassin de Big Creek1991 km²
3 dept-equivalent regions (GADM L2)
- 242.2 km²68.6% of basin
- Erie82.0 km²23.2% of basin
- 28.9 km²8.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
809 distinct species · 3 590 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Twelvemile Creek : 28 espèces reliées par 92 interactions GloBI sur 5 types (connectance 11.8%, 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°
8,9°C
Annual rain
1 037mm
Moisture idx (CMI)
0,15
Runoff
334mm/an
PET
883mm
AET
721mm
Mean slope
0,5°
Water table
28cm
Forest
20%
Crops
27%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)