HydroBASINS lev08 watershed · #7080041230
Bassin de Mattawoman Creek
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 : Charles, District of Columbia, Prince George's, Saint Mary's
Sub-basin area
2 736,6km²
Upstream area
2 736,6km²
Discharge
4,28m³/s
Mean elev.
36m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 1192.2 km²43.5% of basin
- 950.5 km²34.7% of basin
- 434.1 km²15.9% of basin
- District of ColumbiaDistrict of Columbia · United States15.7 km²0.6% of basin
30 intersecting protected areas
DNR
IUCN Not AssignedConservation Easement
14.10 km² overlap
Piscataway Heights
IUCN Not AssignedConservation Easement
12.62 km² overlap
Mattawoman
IUCN VNatural Environment Area
11.51 km² overlap
Nanjemoy Creek Fee
IUCN VPrivate Conservation Land
10.88 km² overlap
Cedar Point
IUCN VWildlife Management Area
8.07 km² overlap
Piscataway
IUCN IIIPark
7.84 km² overlap
Nanjemoy
IUCN VNatural Resource Management Area
6.77 km² overlap
Putuxent River
IUCN IIIPark
4.80 km² overlap
Marine Protected Area
2.58 km² overlap
21 more protected areassorted by overlap area
Lower Potomac River230
IUCN VEnvironmental System
2.22 km² overlap
Tinkers Creek Stream Valley
IUCN IIIPark
1.91 km² overlap
Zekiah Swamp
IUCN VNatural Environment Area
1.75 km² overlap
St. Mary's County, MD easem
IUCN Not AssignedConservation Easement
1.12 km² overlap
Bowen
IUCN VWildlife Management Area
0.85 km² overlap
RM Services FMB
IUCN Not AssignedConservation Easement
0.77 km² overlap
Harris Property FMB (CIP)
IUCN Not AssignedConservation Easement
0.72 km² overlap
Mattawoman Watershed
IUCN IIIWatershed
0.61 km² overlap
Maryland Environmental Trust Easement #79
IUCN Not AssignedEasement
0.54 km² overlap
Worthington
IUCN Not AssignedConservation Easement
0.46 km² overlap
Maryland Environmental Trust Easement #45
IUCN Not AssignedEasement
0.41 km² overlap
Carrage Crossing Section
IUCN Not AssignedConservation Easement
0.36 km² overlap
Reserve Program
0.34 km² overlap
Coachman's Path
IUCN Not AssignedPath
0.32 km² overlap
Chestnut Grove
IUCN Not AssignedGrove
0.31 km² overlap
Beaver Creek
IUCN Not AssignedConservation Easement
0.31 km² overlap
Maryland Environmental Trust Easement #64
IUCN Not AssignedEasement
0.27 km² overlap
Inverness Estates
IUCN Not AssignedConservation Easement
0.26 km² overlap
Suitland Bog
IUCN IIIPark
0.25 km² overlap
Girls Scounts Camp NatCap
IUCN Not AssignedConservation Easement
0.23 km² overlap
Scotland Heights
IUCN Not AssignedConservation Easement
0.23 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 832 distinct species · 1 199 812 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Mattawoman Creek : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 3 types (connectance 13.0%, 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°
13,4°C
Annual rain
1 050mm
Moisture idx (CMI)
-0,06
Runoff
429mm/an
PET
1 120mm
AET
839mm
Mean slope
1,3°
Water table
82cm
Forest
86%
Crops
12%
Urban
13%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)