HydroBASINS lev08 watershed · #7080707460
Bassin de Big Black 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 8 administrative regions : Attala, Carroll, Choctaw, Holmes, Leake +3
Sub-basin area
2 857,5km²
Upstream area
4 269,4km²
Discharge
88,82m³/s
Mean elev.
109m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Black River Canal880 km²
- Bassin de Big Bywy Ditch533 km²
8 dept-equivalent regions (GADM L2)
- 1064.6 km²37.3% of basin
- Holmes548.4 km²19.2% of basin
- Montgomery421.7 km²14.8% of basin
- Carroll395.3 km²13.8% of basin
- 157.2 km²5.5% of basin
- Madison154.9 km²5.4% of basin
- Choctaw64.7 km²2.3% of basin
- 49.4 km²1.7% of basin
5 intersecting protected areas
Reserve Program
3.15 km² overlap
Conservation Easement
0.91 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not AssignedConservation Easement
0.68 km² overlap
Wetlands Reserve Program (WRP), Holmes, MS
IUCN Not AssignedReserve Program
0.68 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not AssignedConservation Easement
0.53 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 820 distinct species · 10 354 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 52 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 Black River : 42 espèces reliées par 118 interactions GloBI sur 4 types (connectance 8.6%, 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°
16,8°C
Annual rain
1 439mm
Moisture idx (CMI)
0,03
Runoff
670mm/an
PET
1 400mm
AET
1 060mm
Mean slope
1,5°
Water table
66cm
Forest
71%
Crops
15%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)