HydroBASINS lev08 watershed · #7080501720
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 4 administrative regions : Benton, Iowa, Johnson, Linn
Sub-basin area
1 428,2km²
Upstream area
8 602,8km²
Discharge
71,68m³/s
Mean elev.
237m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Bear Creek574 km²
- Bassin de North Walnet Creek508 km²
4 dept-equivalent regions (GADM L2)
- JohnsonIowa · United States871.4 km²60.9% of basin
- IowaIowa · United States402.0 km²28.1% of basin
- LinnIowa · United States102.5 km²7.2% of basin
- BentonIowa · United States54.4 km²3.8% of basin
30 intersecting protected areas
Iowa River Corridor
IUCN VWildlife Management Area
3.65 km² overlap
Reserve Program
3.14 km² overlap
Port Louisa
IUCN IVNational Wildlife Refuge
2.85 km² overlap
Reserve Program
2.69 km² overlap
Reserve Program
2.40 km² overlap
Big Bend
IUCN VConservation Area
1.34 km² overlap
Reserve Program
1.24 km² overlap
Watershed Protection
0.97 km² overlap
Hanging Rock Ridge
IUCN VWildlife Management Area
0.96 km² overlap
21 more protected areassorted by overlap area
Hawkeye
IUCN VWildlife Management Area
0.78 km² overlap
Turkey Creek
IUCN VPreserve
0.43 km² overlap
Oakdale
IUCN VOpen Space
0.40 km² overlap
Simmons Timber
IUCN VReserve
0.38 km² overlap
Clear Creek Area
IUCN VLocal Conservation Area
0.35 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Johnson, IA
IUCN VConservation Easement
0.32 km² overlap
Gunderson
IUCN VWildlife Area
0.24 km² overlap
Big Grove
IUCN VPreserve
0.16 km² overlap
O'mara - Newport Woods
IUCN VNGO Preserve
0.12 km² overlap
Finkbine Woodlands
IUCN VGreenspace
0.11 km² overlap
Stainbrook
IUCN VState Preserve
0.09 km² overlap
Iowa CIty
IUCN VGreenspace
0.08 km² overlap
Dickens
IUCN VPreserve
0.06 km² overlap
Public
IUCN VOpen Space
0.06 km² overlap
Shimek Ravine
IUCN Not AssignedConservation Easement
0.06 km² overlap
West RIver Bluffs
IUCN VGreenspace
0.05 km² overlap
Hakweye
IUCN VWildlife Management Area
0.04 km² overlap
Ralston Creek
IUCN VGreenspace
0.03 km² overlap
Quad Ravine
IUCN VGreenspace
0.02 km² overlap
Hubbard
IUCN VPark
0.02 km² overlap
Arboretum
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 594 distinct species · 782 431 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 : 34 espèces reliées par 85 interactions GloBI sur 4 types (connectance 9.9%, filtre Serrano α=0.2). 8 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°
9,4°C
Annual rain
895mm
Moisture idx (CMI)
-0,13
Runoff
262mm/an
PET
1 024mm
AET
758mm
Mean slope
1,5°
Water table
100cm
Forest
12%
Crops
58%
Urban
6%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)