HydroBASINS lev08 watershed · #7080494080
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, Marshall, Poweshiek, Tama
Sub-basin area
928,6km²
Upstream area
5 519,4km²
Discharge
45,67m³/s
Mean elev.
282m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Linn Creek538 km²
- Bassin de Timber Creek323 km²
4 dept-equivalent regions (GADM L2)
- TamaIowa · United States814.5 km²87.6% of basin
- MarshallIowa · United States89.3 km²9.6% of basin
- PoweshiekIowa · United States26.1 km²2.8% of basin
- BentonIowa · United States0.1 km²0.0% of basin
15 intersecting protected areas
Reserve Program
14.35 km² overlap
Otter Creek Marsh
IUCN VWildlife Management Area
14.20 km² overlap
Iowa River Corridor
IUCN VWildlife Management Area
9.20 km² overlap
Reserve Program
7.87 km² overlap
Port Louisa
IUCN IVNational Wildlife Refuge
6.33 km² overlap
Watershed Protection
1.38 km² overlap
Union Grove
IUCN VWildlife Management Area
0.91 km² overlap
Columbia
IUCN VWildlife Area
0.64 km² overlap
Mericle Woods
IUCN VState Preserve
0.51 km² overlap
6 more protected areassorted by overlap area
Iowa River Corridor
IUCN VWildlife Management Area
0.46 km² overlap
Iowa River Natural
IUCN VWildlife Area
0.40 km² overlap
Wildlife Refuge
0.20 km² overlap
Conservation Easement
0.09 km² overlap
Izaak Walton Tract
IUCN VLocal Conservation Area
0.06 km² overlap
Reserve Program
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
473 distinct species · 22 252 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 : 27 espèces reliées par 68 interactions GloBI sur 3 types (connectance 11.4%, 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°
8,4°C
Annual rain
878mm
Moisture idx (CMI)
-0,12
Runoff
268mm/an
PET
1 002mm
AET
743mm
Mean slope
1,7°
Water table
109cm
Forest
9%
Crops
83%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)