HydroBASINS lev08 watershed · #7080705970
Bassin de Big Sunflower 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 : Humphreys, Sharkey, Washington, Yazoo
Sub-basin area
733,3km²
Upstream area
6 089,4km²
Discharge
148,26m³/s
Mean elev.
32m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Bogue Phalia1073 km²
- Bassin de Big Sunflower River795 km²
4 dept-equivalent regions (GADM L2)
- 353.0 km²48.2% of basin
- 196.3 km²26.8% of basin
- Washington166.6 km²22.7% of basin
- 17.0 km²2.3% of basin
12 intersecting protected areas
Sunflower
IUCN VState Conservation Area
85.40 km² overlap
Reserve Program
14.20 km² overlap
Sunflower
IUCN VWildlife Management Area
9.80 km² overlap
Holt Collier
IUCN IVNational Wildlife Refuge
7.97 km² overlap
Sunf
IUCN VGreentree
6.06 km² overlap
Reserve Program
4.19 km² overlap
Theodore Roosevelt
IUCN IVNational Wildlife Refuge
3.36 km² overlap
Wetlands Reserve Program (WRP)
IUCN Not AssignedReserve Program
3.00 km² overlap
Private 16
IUCN VConservation Easement
2.25 km² overlap
3 more protected areassorted by overlap area
Conservation Easement
0.45 km² overlap
Green Ash
IUCN IaResearch Natural Area
0.29 km² overlap
Over Cup Oak
IUCN IaResearch Natural Area
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
601 distinct species · 3 814 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Sunflower River : 33 espèces reliées par 98 interactions GloBI sur 4 types (connectance 10.4%, 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°
17,5°C
Annual rain
1 380mm
Moisture idx (CMI)
0,01
Runoff
834mm/an
PET
1 367mm
AET
1 022mm
Mean slope
0,2°
Water table
9cm
Forest
24%
Crops
58%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)