HydroBASINS lev08 watershed · #7080451830
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 6 administrative regions : Brookings, Lake, Lincoln, Minnehaha, Moody +1
Sub-basin area
1 732,5km²
Upstream area
9 806,6km²
Discharge
12,03m³/s
Mean elev.
498m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Medary Creek630 km²
- Bassin de Big Sioux River70 km²
6 dept-equivalent regions (GADM L2)
- 1000.5 km²57.6% of basin
- 274.4 km²15.8% of basin
- 178.1 km²10.3% of basin
- Lincoln99.2 km²5.7% of basin
- 98.3 km²5.7% of basin
- Lake85.4 km²4.9% of basin
27 intersecting protected areas
Reserve Program
14.10 km² overlap
Moody County
IUCN VWaterfowl Production Area
6.50 km² overlap
Private Conservation Land
3.80 km² overlap
Wentworth
IUCN VState Wildlife Management Area
2.75 km² overlap
Hole-In-Mountain
IUCN VState Wildlife Management Area
2.58 km² overlap
Winter
IUCN VState Wildlife Management Area
2.35 km² overlap
Altona
IUCN VState Wildlife Management Area
2.23 km² overlap
Reserve Program
1.83 km² overlap
National Wildlife Refuge
1.44 km² overlap
18 more protected areassorted by overlap area
Watershed Protection
1.32 km² overlap
Reserve Program
1.32 km² overlap
Lake County
IUCN VWaterfowl Production Area
1.15 km² overlap
National Wildlife Refuge
1.14 km² overlap
Sioux Prairie Fee
IUCN VPrivate Conservation Land
0.80 km² overlap
Martin County
IUCN VWaterfowl Production Area
0.73 km² overlap
Boles Slough
IUCN VState Wildlife Management Area
0.66 km² overlap
Kamp
IUCN VState Wildlife Management Area
0.64 km² overlap
Schindel
IUCN VState Wildlife Management Area
0.63 km² overlap
Conservation Easement
0.34 km² overlap
Coteau Pit
IUCN VState Wildlife Management Area
0.33 km² overlap
State Wildlife Management Area
0.30 km² overlap
Easement
0.23 km² overlap
Permanent
IUCN VWetland Preserve
0.09 km² overlap
NPLT
IUCN Not AssignedEasement
0.08 km² overlap
Olson
IUCN VLake
0.05 km² overlap
Reserve Program
0.04 km² overlap
Reserve Program
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
991 distinct species · 17 427 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 : 29 espèces reliées par 126 interactions GloBI sur 4 types (connectance 15.4%, filtre Serrano α=0.2). 12 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°
6,5°C
Annual rain
607mm
Moisture idx (CMI)
-0,37
Runoff
147mm/an
PET
957mm
AET
520mm
Mean slope
0,8°
Water table
96cm
Forest
5%
Crops
71%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)