HydroBASINS lev08 watershed · #7080435050
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, Moody
Sub-basin area
69,7km²
Upstream area
7 444,2km²
Discharge
20,34m³/s
Mean elev.
489m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Battle Creek470 km²
- Bassin de Big Sioux River164 km²
2 dept-equivalent regions (GADM L2)
- 47.4 km²67.9% of basin
- 22.4 km²32.1% of basin
6 intersecting protected areas
Reserve Program
5.32 km² overlap
Moody County
IUCN VWaterfowl Production Area
0.71 km² overlap
NPLT
IUCN Not AssignedEasement
0.31 km² overlap
Watershed Protection
0.24 km² overlap
Brookings Prairie
IUCN VLocal Conservation Area
0.16 km² overlap
Reserve Program
0.12 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
640 distinct species · 30 405 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 117 interactions GloBI sur 4 types (connectance 19.7%, filtre Serrano α=0.2). 11 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
580mm
Moisture idx (CMI)
-0,38
Runoff
139mm/an
PET
942mm
AET
498mm
Mean slope
0,4°
Water table
56cm
Forest
10%
Crops
71%
Urban
12%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)