HydroBASINS lev08 watershed · #7080041380
Bassin de Northwest Branch Anacostia 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 3 administrative regions : District of Columbia, Montgomery, Prince George's
Sub-basin area
441,1km²
Upstream area
441,2km²
Discharge
6,87m³/s
Mean elev.
71m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 231.6 km²52.5% of basin
- Montgomery154.0 km²34.9% of basin
- District of ColumbiaDistrict of Columbia · United States55.8 km²12.6% of basin
24 intersecting protected areas
Paint Branch Stream Valley
IUCN IIIPark
5.30 km² overlap
Duvall Road Nca
IUCN VLocal Conservation Area
3.55 km² overlap
Patuxent Research
IUCN IVRefuge
3.12 km² overlap
Little Paint Branch
IUCN IIIPark
0.81 km² overlap
Cherry Hill (Paint Branch Svp) Neighborhood
IUCN Not AssignedPark
0.24 km² overlap
University of Maryland Colle
IUCN Not AssignedCollege
0.19 km² overlap
Montgomery County
IUCN Not AssignedEasement
0.16 km² overlap
Maydale Cp
IUCN VLocal Conservation Area
0.10 km² overlap
Sligo Creek Svu 1A
IUCN VLocal Conservation Area
0.09 km² overlap
15 more protected areassorted by overlap area
PB-1 (PB-A) Wetland Mitigation Project
IUCN Not AssignedMitigation
0.07 km² overlap
Maryland National Capital Park and Planning Commission
IUCN Not AssignedPark
0.06 km² overlap
Conservation Area
0.06 km² overlap
Long Branch Svu 1A
IUCN VLocal Conservation Area
0.04 km² overlap
North Park At Cross Creek
IUCN Not AssignedPark
0.03 km² overlap
Upper Northwest Branch Stream Restoration Project
IUCN Not AssignedConservation Easement
0.02 km² overlap
ICC West Operations Facility
IUCN Not AssignedConservation Easement
0.02 km² overlap
Miles Road Nca
IUCN VLocal Conservation Area
0.02 km² overlap
Fairdale Road Nca
IUCN VLocal Conservation Area
0.02 km² overlap
Llewellyn
IUCN Not AssignedFields
0.01 km² overlap
Police Station Woods
IUCN VLocal Conservation Area
0.01 km² overlap
Jesse Warr Park Stream Restora
IUCN Not AssignedPark
0.01 km² overlap
Calverton Neighborhood
IUCN VConservation Area
0.01 km² overlap
Hastings Nca
IUCN VLocal Conservation Area
0.00 km² overlap
Dartmouth Nca
IUCN VLocal Conservation Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 772 distinct species · 2 006 627 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Northwest Branch Anacostia River : 28 espèces reliées par 79 interactions GloBI sur 4 types (connectance 11.2%, filtre Serrano α=0.2). 10 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°
12,7°C
Annual rain
1 066mm
Moisture idx (CMI)
-0,05
Runoff
491mm/an
PET
1 122mm
AET
846mm
Mean slope
1,8°
Water table
107cm
Forest
16%
Crops
3%
Urban
85%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)