HydroBASINS lev08 watershed · #7080434930
Bassin de Twin Rivers
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 : Lake Michigan, Manitowoc
Sub-basin area
834,8km²
Upstream area
3 174,4km²
Discharge
22,74m³/s
Mean elev.
175m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de East Twin River787 km²
- Bassin de Silver Creek225 km²
3 dept-equivalent regions (GADM L2)
- Lake Michigan806.3 km²96.4% of basin
- Lake Michigan26.1 km²3.1% of basin
- 4.1 km²0.5% of basin
1 intersecting protected areas
Marine Protected Area
306.24 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
941 distinct species · 34 662 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Twin Rivers : 24 espèces reliées par 64 interactions GloBI sur 4 types (connectance 11.4%, 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°
7,1°C
Annual rain
778mm
Moisture idx (CMI)
-0,04
Runoff
227mm/an
PET
808mm
AET
628mm
Mean slope
0,0°
Water table
1cm
Forest
0%
Crops
52%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)