HydroBASINS lev08 watershed · #7080433680
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 2 administrative regions : Brookings, Lake
Sub-basin area
163,5km²
Upstream area
6 904,3km²
Discharge
19,8m³/s
Mean elev.
514m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Sioux River851 km²
- Bassin de North Deer Creek528 km²
2 dept-equivalent regions (GADM L2)
- 139.0 km²84.9% of basin
- Lake24.8 km²15.1% of basin
8 intersecting protected areas
Brookings County
IUCN VWaterfowl Production Area
4.48 km² overlap
Reserve Program
4.04 km² overlap
Reserve Program
1.78 km² overlap
Brookings County
IUCN VWaterfowl Production Area
1.30 km² overlap
Cheever Slough
IUCN VState Wildlife Management Area
0.79 km² overlap
Reserve Program
0.68 km² overlap
Pederson Slough
IUCN VState Wildlife Management Area
0.26 km² overlap
Watershed Protection
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
224 distinct species · 3 664 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 : 24 espèces reliées par 103 interactions GloBI sur 4 types (connectance 19.5%, 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°
6,3°C
Annual rain
588mm
Moisture idx (CMI)
-0,38
Runoff
136mm/an
PET
943mm
AET
505mm
Mean slope
0,7°
Water table
50cm
Forest
26%
Crops
72%
Urban
1%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)