HydroBASINS lev08 watershed · #7080432370
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 4 administrative regions : Brookings, Deuel, Hamlin, Kingsbury
Sub-basin area
850,6km²
Upstream area
6 212,8km²
Discharge
18,4m³/s
Mean elev.
522m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Hidewood Creek431 km²
- Bassin de Big Sioux River67 km²
4 dept-equivalent regions (GADM L2)
- 643.7 km²75.5% of basin
- Deuel130.6 km²15.3% of basin
- 43.8 km²5.1% of basin
- 34.2 km²4.0% of basin
16 intersecting protected areas
Brookings County
IUCN VWaterfowl Production Area
27.80 km² overlap
Reserve Program
14.58 km² overlap
Reserve Program
2.72 km² overlap
Moe Slough
IUCN VState Wildlife Management Area
2.36 km² overlap
State Wildlife Management Area
2.30 km² overlap
Reserve Program
2.07 km² overlap
Reserve Program
1.69 km² overlap
Brookings County
IUCN VWaterfowl Production Area
1.47 km² overlap
Oakwood Lakes
IUCN VRecreation Area
1.12 km² overlap
7 more protected areassorted by overlap area
Watershed Protection
0.93 km² overlap
Brookings County
IUCN VWaterfowl Production Area
0.63 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Kingsbury, SD
IUCN VConservation Easement
0.47 km² overlap
Reserve Program
0.37 km² overlap
Lake Sinai, N.
IUCN VState Wildlife Management Area
0.36 km² overlap
NPLT
IUCN Not AssignedEasement
0.30 km² overlap
Lake Sinai
IUCN VWildlife Management Area
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
785 distinct species · 40 068 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 : 19 espèces reliées par 107 interactions GloBI sur 4 types (connectance 26.4%, 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°
6,2°C
Annual rain
590mm
Moisture idx (CMI)
-0,37
Runoff
127mm/an
PET
943mm
AET
506mm
Mean slope
0,8°
Water table
58cm
Forest
16%
Crops
74%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)