HydroBASINS lev08 watershed · #7080475010
Bassin de Shell Rock River
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 2 administrative regions : Black Hawk, Bremer
Sub-basin area
4,4km²
Upstream area
6 698,3km²
Discharge
61,18m³/s
Mean elev.
277m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de West Fork Cedar River2228 km²
- Bassin de Shell Rock River1412 km²
2 dept-equivalent regions (GADM L2)
- Black HawkIowa · United States4.4 km²99.7% of basin
- BremerIowa · United States0.0 km²0.3% of basin
3 intersecting protected areas
Fisher
IUCN VForest
0.30 km² overlap
West Fork
IUCN VAccess
0.09 km² overlap
Turkey Ridge
IUCN VWildlife Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
240 distinct species · 3 022 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Shell Rock River : 32 espèces reliées par 99 interactions GloBI sur 4 types (connectance 11.0%, filtre Serrano α=0.2). 11 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°
8,0°C
Annual rain
865mm
Moisture idx (CMI)
-0,11
Runoff
269mm/an
PET
974mm
AET
732mm
Mean slope
1,2°
Water table
46cm
Forest
4%
Crops
75%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)