HydroBASINS lev08 watershed · #7080495940
Bassin de Little Sioux 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 2 administrative regions : Harrison, Monona
Sub-basin area
225,8km²
Upstream area
11 459,7km²
Discharge
61,3m³/s
Mean elev.
326m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Maple River1972 km²
- Bassin de Little Sioux River35 km²
2 dept-equivalent regions (GADM L2)
- MononaIowa · United States192.9 km²85.3% of basin
- HarrisonIowa · United States33.3 km²14.7% of basin
4 intersecting protected areas
Three Rivers
IUCN VWildlife Management Area
0.25 km² overlap
Reserve Program
0.01 km² overlap
Gramm
IUCN VWetland
0.01 km² overlap
I-29
IUCN VWildlife Management Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
163 distinct species · 773 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Little Sioux River : 28 espèces reliées par 91 interactions GloBI sur 5 types (connectance 11.1%, filtre Serrano α=0.2). 13 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°
9,7°C
Annual rain
746mm
Moisture idx (CMI)
-0,30
Runoff
157mm/an
PET
1 064mm
AET
635mm
Mean slope
1,3°
Water table
85cm
Forest
22%
Crops
66%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)