HydroBASINS lev08 watershed · #7080411020
Bassin · #7080411020
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 5 administrative regions : Codington, Day, Grant, Marshall, Roberts
Sub-basin area
1 183,2km²
Upstream area
1 183,5km²
Discharge
1,57m³/s
Mean elev.
565m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 835.5 km²70.5% of basin
- 263.8 km²22.2% of basin
- 78.7 km²6.6% of basin
- Marshall5.4 km²0.5% of basin
- Grant2.5 km²0.2% of basin
30 intersecting protected areas
Roberts County
IUCN VWaterfowl Production Area
66.38 km² overlap
Day County
IUCN VWaterfowl Production Area
39.38 km² overlap
Reserve Program
22.78 km² overlap
Waubay
IUCN IVNational Wildlife Refuge
19.12 km² overlap
Bitter
IUCN VLake
11.78 km² overlap
Watershed Protection
11.39 km² overlap
Roberts County
IUCN VWaterfowl Production Area
6.24 km² overlap
Roberts County
IUCN VWaterfowl Production Area
5.60 km² overlap
State Wildlife Management Area
2.78 km² overlap
21 more protected areassorted by overlap area
Private Conservation Land
2.37 km² overlap
Roberts County
IUCN VWaterfowl Production Area
2.09 km² overlap
Conservation Easement
1.91 km² overlap
Reserve Program
1.88 km² overlap
Marshall County
IUCN VWaterfowl Production Area
1.71 km² overlap
Pickerel
IUCN VLake
1.58 km² overlap
Reserve Program
1.54 km² overlap
Goose
IUCN VLake
1.38 km² overlap
Redetzke
IUCN VState Wildlife Management Area
1.33 km² overlap
Ortley
IUCN VState Wildlife Management Area
1.10 km² overlap
Lohner - Vincent
IUCN VState Wildlife Management Area
1.03 km² overlap
Owens Creek
IUCN VState Wildlife Management Area
1.02 km² overlap
Conservation Easement
1.02 km² overlap
Foldager
IUCN VState Wildlife Management Area
0.96 km² overlap
Codington County
IUCN VWaterfowl Production Area
0.96 km² overlap
Arneson
IUCN VState Wildlife Management Area
0.95 km² overlap
Conservation Easement
0.77 km² overlap
Sunnybrook
IUCN VState Wildlife Management Area
0.68 km² overlap
Lewno
IUCN VState Wildlife Management Area
0.60 km² overlap
Pickerel Lake (okroi)
IUCN VLake
0.53 km² overlap
Redhead Slough
IUCN VState Wildlife Management Area
0.37 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 017 distinct species · 23 019 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 · #7080411020 : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 72 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 7 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
534mm
Moisture idx (CMI)
-0,43
Runoff
41mm/an
PET
931mm
AET
460mm
Mean slope
0,7°
Water table
40cm
Forest
27%
Crops
56%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)