HydroBASINS lev08 watershed · #7080504450
Bassin de Somonauk 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 5 administrative regions : De Kalb, Grundy, Kane, Kendall, La Salle
Sub-basin area
760,6km²
Upstream area
5 881,4km²
Discharge
67,81m³/s
Mean elev.
214m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Fox River1755 km²
- Bassin de Big Rock Creek333 km²
5 dept-equivalent regions (GADM L2)
- De Kalb310.2 km²40.7% of basin
- 269.2 km²35.3% of basin
- 173.5 km²22.8% of basin
- 8.0 km²1.0% of basin
- 0.9 km²0.1% of basin
20 intersecting protected areas
Wildlife Area
2.51 km² overlap
Millbrook
IUCN VForest Preserve
2.38 km² overlap
Nature Preserve
0.51 km² overlap
Jay Woods
IUCN VForest Preserve
0.47 km² overlap
Camp River Trails
IUCN VLand And Water Reserve
0.30 km² overlap
Trails
0.27 km² overlap
Maramech Woods
IUCN VNature Preserve
0.27 km² overlap
Hollenbach Sugarbush
IUCN VForest Preserve
0.19 km² overlap
Nature Preserve
0.12 km² overlap
11 more protected areassorted by overlap area
Harvey Creek
IUCN VConservation Area
0.12 km² overlap
Watershed Protection
0.11 km² overlap
Nature Preserve
0.08 km² overlap
Wedron Palisades
IUCN VNature Preserve
0.06 km² overlap
Nature Preserve
0.05 km² overlap
Millington Fen
IUCN VConservation Area
0.04 km² overlap
Tucker-Millington Fen
IUCN VNature Preserve
0.04 km² overlap
Millhurst Fen
IUCN VState Natural Area
0.03 km² overlap
Millhurst Fen
IUCN VNatural Area
0.02 km² overlap
Maramech Woods
IUCN VConservation Area
0.01 km² overlap
Fox River
IUCN VNatural Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 432 distinct species · 101 530 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Somonauk Creek : 25 espèces reliées par 68 interactions GloBI sur 3 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°
9,1°C
Annual rain
923mm
Moisture idx (CMI)
-0,08
Runoff
365mm/an
PET
1 007mm
AET
776mm
Mean slope
0,5°
Water table
37cm
Forest
11%
Crops
81%
Urban
3%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)