HydroBASINS lev08 watershed · #7080040840
Bassin de Blackwater 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 1 administrative regions : Dorchester
Sub-basin area
312,4km²
Upstream area
312,4km²
Discharge
9,72m³/s
Mean elev.
2m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 312.1 km²99.9% of basin
7 intersecting protected areas
Blackwater
IUCN IVNational Wildlife Refuge
114.67 km² overlap
Marine Protected Area
99.74 km² overlap
Chesapeake Bay Estuarine Complex
IUCN Not ReportedWetland of International Importance (Ramsar Site)
28.54 km² overlap
Robinson Neck Fee
IUCN VPrivate Conservation Land
1.45 km² overlap
Maryland Environmental Trust Easement #8
IUCN Not AssignedEasement
0.34 km² overlap
Reserve Program
0.24 km² overlap
Blackwater
IUCN VNational Wildlife Refuge
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 582 distinct species · 471 443 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Blackwater River : 25 espèces reliées par 72 interactions GloBI sur 3 types (connectance 13.6%, filtre Serrano α=0.2). 8 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°
13,7°C
Annual rain
1 090mm
Moisture idx (CMI)
-0,01
Runoff
504mm/an
PET
1 103mm
AET
842mm
Mean slope
0,3°
Water table
10cm
Forest
50%
Crops
22%
Urban
1%
Protected
50%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)