HydroBASINS lev08 watershed · #7080474480
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 8 administrative regions : Black Hawk, Bremer, Butler, Cerro Gordo, Floyd +3
Sub-basin area
1 412km²
Upstream area
4 466,1km²
Discharge
41,68m³/s
Mean elev.
318m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Winnebago River1685 km²
- Bassin de Shell Rock River1369 km²
8 dept-equivalent regions (GADM L2)
- FloydIowa · United States639.4 km²45.2% of basin
- ButlerIowa · United States515.9 km²36.5% of basin
- Cerro GordoIowa · United States173.1 km²12.2% of basin
- BremerIowa · United States62.7 km²4.4% of basin
- MitchellIowa · United States20.7 km²1.5% of basin
- WorthIowa · United States1.3 km²0.1% of basin
- FranklinIowa · United States1.1 km²0.1% of basin
- Black HawkIowa · United States0.4 km²0.0% of basin
19 intersecting protected areas
Walnut Bend
IUCN VWildlife Management Area
0.99 km² overlap
Watershed Protection
0.96 km² overlap
Shell Rock Bend
IUCN VWildlife Management Area
0.89 km² overlap
Watershed Protection
0.86 km² overlap
Cedar Hills
IUCN VLocal Conservation Area
0.65 km² overlap
Conservation Easement
0.33 km² overlap
Conservation Easement
0.33 km² overlap
Reserve Program
0.33 km² overlap
Shell Rock
IUCN VWildlife Area
0.29 km² overlap
10 more protected areassorted by overlap area
Happy Acres
IUCN VLocal Conservation Area
0.16 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Butler, IA
IUCN Not AssignedConservation Easement
0.16 km² overlap
Puhl Wildlife
IUCN VLocal Conservation Area
0.14 km² overlap
Wolter's Prairie
IUCN VPreserve
0.14 km² overlap
Koebrick Wildlife
IUCN VLocal Conservation Area
0.13 km² overlap
Joney Laudner Family
IUCN VNature Preserve
0.13 km² overlap
Hauser
IUCN VWildlife Area
0.08 km² overlap
Fisher
IUCN VForest
0.04 km² overlap
Peterson Prairie
IUCN VLocal Conservation Area
0.02 km² overlap
Bird Hill
IUCN VState Preserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
774 distinct species · 24 588 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 : 26 espèces reliées par 76 interactions GloBI sur 4 types (connectance 12.1%, 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°
7,7°C
Annual rain
843mm
Moisture idx (CMI)
-0,12
Runoff
279mm/an
PET
961mm
AET
714mm
Mean slope
0,7°
Water table
58cm
Forest
1%
Crops
82%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)