HydroBASINS lev08 watershed · #7080483270
Bassin de Iowa 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 7 administrative regions : Cerro Gordo, Franklin, Grundy, Hancock, Hardin +2
Sub-basin area
2 015,8km²
Upstream area
2 015,8km²
Discharge
16,58m³/s
Mean elev.
363m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- HancockIowa · United States823.6 km²40.8% of basin
- WrightIowa · United States514.4 km²25.5% of basin
- HardinIowa · United States327.0 km²16.2% of basin
- FranklinIowa · United States297.2 km²14.7% of basin
- Cerro GordoIowa · United States33.1 km²1.6% of basin
- GrundyIowa · United States20.1 km²1.0% of basin
- WinnebagoIowa · United States3.9 km²0.2% of basin
30 intersecting protected areas
Reserve Program
8.34 km² overlap
Wright County
IUCN VIWaterfowl Production Area
5.64 km² overlap
Wetland
3.09 km² overlap
Hancock County
IUCN VIWaterfowl Production Area
2.81 km² overlap
Eagle Flats
IUCN VWildlife Management Area
2.37 km² overlap
Gladfelter Marsh
IUCN VWildlife Management Area
2.33 km² overlap
Whitetail Flats
IUCN VWildlife Management Area
1.61 km² overlap
Crystal Hills
IUCN VWildlife Management Area
1.47 km² overlap
Reserve Program
1.44 km² overlap
21 more protected areassorted by overlap area
East Twin Lake
IUCN VWildlife Management Area
1.21 km² overlap
Lower Morse Lake
IUCN VWildlife Management Area
1.08 km² overlap
Jason Smith
IUCN VWildlife Management Area
0.97 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Hardin, IA
IUCN Not AssignedConservation Easement
0.96 km² overlap
Conservation Easement
0.96 km² overlap
Reserve Program
0.93 km² overlap
Anders
IUCN VWildlife Area
0.90 km² overlap
Warren E. Fox
IUCN VWildlife Management Area
0.90 km² overlap
Watershed Protection
0.89 km² overlap
Crystal Lake
IUCN VWildlife Management Area
0.88 km² overlap
Lake George
IUCN VWildlife Management Area
0.87 km² overlap
Noble & Jeanette de Neui
IUCN VWildlife Area
0.83 km² overlap
Leverton Timber
IUCN VLocal Conservation Area
0.79 km² overlap
Oakland-Iowa River
IUCN VConservation Area
0.78 km² overlap
Ventura Marsh
IUCN VWildlife Management Area
0.77 km² overlap
Coulter Marsh
IUCN VWildlife Management Area
0.75 km² overlap
Lake Edwards
IUCN VWildlife Management Area
0.71 km² overlap
Eight Mile Pits
IUCN VWildlife Management Area
0.67 km² overlap
Lake
0.65 km² overlap
Groom
IUCN VWildlife Management Area
0.64 km² overlap
Buffalo Basins
IUCN VWildlife Management Area
0.59 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 026 distinct species · 27 419 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Iowa River : 25 espèces reliées par 65 interactions GloBI sur 3 types (connectance 11.6%, filtre Serrano α=0.2). 9 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
821mm
Moisture idx (CMI)
-0,15
Runoff
252mm/an
PET
966mm
AET
697mm
Mean slope
0,6°
Water table
43cm
Forest
2%
Crops
85%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)