HydroBASINS lev08 watershed · #7080560490
Bassin de Big Blue 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 5 administrative regions : Clay, Marshall, Pottawatomie, Riley, Washington
Sub-basin area
1 637,7km²
Upstream area
24 846,4km²
Discharge
104,83m³/s
Mean elev.
394m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Black Vermillion River1369 km²
- Bassin de Elm Creek208 km²
5 dept-equivalent regions (GADM L2)
- 715.8 km²43.7% of basin
- 562.1 km²34.3% of basin
- Washington151.8 km²9.3% of basin
- Clay136.2 km²8.3% of basin
- Marshall73.4 km²4.5% of basin
3 intersecting protected areas
Reserve Program
13.67 km² overlap
Reserve Program
6.22 km² overlap
Reserve Program
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 250 distinct species · 396 096 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Big Blue River : 30 espèces reliées par 79 interactions GloBI sur 3 types (connectance 11.2%, 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°
11,9°C
Annual rain
829mm
Moisture idx (CMI)
-0,29
Runoff
136mm/an
PET
1 168mm
AET
703mm
Mean slope
2,0°
Water table
223cm
Forest
0%
Crops
36%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)