HydroBASINS lev08 watershed · #7080523270
Bassin de West Nishnabotna 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 9 administrative regions : Audubon, Carroll, Crawford, Fremont, Mills +4
Sub-basin area
4 213,6km²
Upstream area
4 213,8km²
Discharge
29,4m³/s
Mean elev.
372m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
9 dept-equivalent regions (GADM L2)
- PottawattamieIowa · United States1291.2 km²30.6% of basin
- ShelbyIowa · United States916.7 km²21.7% of basin
- MillsIowa · United States677.7 km²16.1% of basin
- FremontIowa · United States383.7 km²9.1% of basin
- CrawfordIowa · United States287.0 km²6.8% of basin
- MontgomeryIowa · United States259.4 km²6.1% of basin
- AudubonIowa · United States214.6 km²5.1% of basin
- CarrollIowa · United States172.0 km²4.1% of basin
1 moreFull L2 list
- Page17.1 km² · 0.4%
17 intersecting protected areas
Lake Shawtee
IUCN VWildlife Management Area
4.72 km² overlap
Willow Slough
IUCN VWildlife Management Area
2.43 km² overlap
Riverton
IUCN VWildlife Management Area
1.95 km² overlap
V&w Petersen
IUCN VWildlife Management Area
1.83 km² overlap
Farm Creek Public
IUCN VWildlife Area
1.28 km² overlap
Reserve Program
0.78 km² overlap
Watershed Protection
0.75 km² overlap
Ray Thomas
IUCN VWildlife Preserve
0.36 km² overlap
Oak Ridge
IUCN VWildlife Area
0.31 km² overlap
8 more protected areassorted by overlap area
Reserve Program
0.29 km² overlap
Upper'nish'
IUCN VHabitat Area
0.22 km² overlap
Reserve Program
0.08 km² overlap
Dinesen Prairie
IUCN VState Preserve
0.08 km² overlap
Fisher
IUCN VWildlife Area
0.08 km² overlap
Green
IUCN VWildlife Management Area
0.04 km² overlap
West Botna
IUCN VWildlife Area
0.02 km² overlap
Local Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
981 distinct species · 16 634 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 West Nishnabotna River : 32 espèces reliées par 106 interactions GloBI sur 4 types (connectance 12.9%, 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°
9,4°C
Annual rain
827mm
Moisture idx (CMI)
-0,21
Runoff
212mm/an
PET
1 046mm
AET
701mm
Mean slope
2,0°
Water table
159cm
Forest
0%
Crops
83%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)