HydroBASINS lev08 watershed · #7080486740
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 3 administrative regions : Grundy, Hardin, Marshall
Sub-basin area
221,5km²
Upstream area
3 057,9km²
Discharge
25,11m³/s
Mean elev.
307m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Iowa River2016 km²
- Bassin de South Fork Iowa River821 km²
3 dept-equivalent regions (GADM L2)
- HardinIowa · United States97.8 km²44.1% of basin
- GrundyIowa · United States83.6 km²37.7% of basin
- MarshallIowa · United States40.4 km²18.2% of basin
6 intersecting protected areas
Grammer Grove
IUCN VWildlife Area
0.49 km² overlap
Forest Reserve and
IUCN VAccess Area
0.34 km² overlap
Reserve Program
0.12 km² overlap
C.F. Long Memorial Woods
IUCN VLocal Conservation Area
0.08 km² overlap
C.F. Long Wildlife Woods
IUCN VLocal Conservation Area
0.04 km² overlap
Local Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
157 distinct species · 1 024 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 : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 4 types (connectance 10.3%, filtre Serrano α=0.2). 12 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°
8,1°C
Annual rain
852mm
Moisture idx (CMI)
-0,14
Runoff
260mm/an
PET
987mm
AET
722mm
Mean slope
1,1°
Water table
69cm
Forest
0%
Crops
83%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)