HydroBASINS lev08 watershed · #7080464200
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 6 administrative regions : Cerro Gordo, Floyd, Freeborn, Mitchell, Winnebago +1
Sub-basin area
1 368,6km²
Upstream area
1 368,6km²
Discharge
13,04m³/s
Mean elev.
372m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 628.5 km²45.8% of basin
- WorthIowa · United States553.1 km²40.3% of basin
- Cerro GordoIowa · United States100.7 km²7.3% of basin
- FloydIowa · United States79.9 km²5.8% of basin
- WinnebagoIowa · United States8.9 km²0.7% of basin
- MitchellIowa · United States0.1 km²0.0% of basin
30 intersecting protected areas
Elk Creek Marsh
IUCN VWildlife Management Area
10.38 km² overlap
Wetlands Reserve Program (WRP)
IUCN Not AssignedReserve Program
8.43 km² overlap
Freeborn County
IUCN VIWaterfowl Production Area
7.84 km² overlap
Reserve Program
5.20 km² overlap
Panicum Prairie
IUCN VState Wildlife Management Area
4.24 km² overlap
Worth County
IUCN VIWaterfowl Production Area
2.20 km² overlap
Reserve Program
2.20 km² overlap
Shellrock River
IUCN VGreenbelt
1.95 km² overlap
Reserve Program
1.65 km² overlap
21 more protected areassorted by overlap area
Panicum Prairie
IUCN VLocal Conservation Area
1.48 km² overlap
Christianson-Taylor
IUCN VWildlife Area
1.32 km² overlap
Reserve Program
1.19 km² overlap
Conservation Easement
0.96 km² overlap
Nagle Wildlife
IUCN VLocal Conservation Area
0.85 km² overlap
Stimes Woods
IUCN VLocal Conservation Area
0.64 km² overlap
Halls Lake
IUCN VState Wildlife Management Area
0.62 km² overlap
Big Stone County
IUCN VWaterfowl Production Area
0.55 km² overlap
Turkeyfoot Prairie
IUCN VLocal Conservation Area
0.54 km² overlap
Ann & Leo Donahue
IUCN VState Wildlife Management Area
0.47 km² overlap
Magaksica
IUCN VState Wildlife Management Area
0.46 km² overlap
Shellrock
IUCN VWildlife Management Area
0.42 km² overlap
Permanent
IUCN VWetland Preserve
0.38 km² overlap
Martin County
IUCN VWaterfowl Production Area
0.38 km² overlap
Farm Service Agency Interest Of Ia
IUCN Not AssignedConservation Easement
0.38 km² overlap
Freeborn County
IUCN VWaterfowl Production Area
0.33 km² overlap
Silver Lake Marsh
IUCN VWildlife Management Area
0.32 km² overlap
Sidney Swensrud
IUCN VWildlife Area
0.31 km² overlap
Reserve Program
0.29 km² overlap
Manchester
IUCN VState Wildlife Management Area
0.28 km² overlap
Easement
0.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 331 distinct species · 58 909 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 Shell Rock River : 33 espèces reliées par 76 interactions GloBI sur 3 types (connectance 9.7%, filtre Serrano α=0.2). 7 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°
7,0°C
Annual rain
809mm
Moisture idx (CMI)
-0,13
Runoff
290mm/an
PET
931mm
AET
684mm
Mean slope
0,7°
Water table
43cm
Forest
2%
Crops
79%
Urban
1%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)