HydroBASINS lev08 watershed · #7080412470
Bassin de Big 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 1 administrative regions : Codington
Sub-basin area
95,3km²
Upstream area
1 665,4km²
Discharge
1,96m³/s
Mean elev.
541m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #70804110201183 km²
- Bassin · #7080411090387 km²
1 dept-equivalent regions (GADM L2)
- 95.5 km²100.0% of basin
5 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
148 distinct species · 742 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Sioux River : 16 espèces reliées par 85 interactions GloBI sur 4 types (connectance 26.2%, filtre Serrano α=0.2). 10 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°
5,9°C
Annual rain
550mm
Moisture idx (CMI)
-0,41
Runoff
61mm/an
PET
930mm
AET
474mm
Mean slope
0,7°
Water table
56cm
Forest
24%
Crops
71%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)