HydroBASINS lev08 watershed · #7080040480
Bassin de Machipongo 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 5 administrative regions : Accomack, Kent, Northampton, Sussex, Worcester
Sub-basin area
4 036,2km²
Upstream area
4 036,2km²
Discharge
0,6m³/s
Mean elev.
7m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- Sussex1261.7 km²31.2% of basin
- 1158.6 km²28.7% of basin
- Northampton587.1 km²14.5% of basin
- 501.9 km²12.4% of basin
- Kent131.5 km²3.3% of basin
30 intersecting protected areas
Chesapeake Bay Estuarine Complex
IUCN Not ReportedWetland of International Importance (Ramsar Site)
560.95 km² overlap
Delaware Bay Estuary
IUCN Not ReportedWetland of International Importance (Ramsar Site)
186.01 km² overlap
Assateague Island
IUCN VNational Seashore
110.27 km² overlap
Marine Protected Area
110.03 km² overlap
Tidal Lands
IUCN VIState Owned Tidal Lands
103.74 km² overlap
Marine Protected Area
52.94 km² overlap
The Nature Conservancy
IUCN VEasement
50.49 km² overlap
Chincoteague
IUCN IVNational Wildlife Refuge
47.55 km² overlap
Marine Protected Area
41.04 km² overlap
21 more protected areassorted by overlap area
Prime Hook
IUCN IVNational Wildlife Refuge
37.38 km² overlap
Mockhorn
IUCN VWildlife Management Area
31.17 km² overlap
Great Cypress Swamp
IUCN VPCL
26.06 km² overlap
Saxis
IUCN VWildlife Management Area
24.54 km² overlap
Cape Henlopen State Park
IUCN IVMarine Protected Area
21.73 km² overlap
Parramore Island
IUCN Not AssignedConservation Easement
19.08 km² overlap
Parramore Island
IUCN VState Natural Area Preserve
17.90 km² overlap
DNR
IUCN Not AssignedConservation Easement
14.07 km² overlap
Milford Neck
IUCN VPreserve
13.49 km² overlap
Marine Protected Area
12.85 km² overlap
Assawoman Wildlife Area
IUCN VIMarine Protected Area
11.61 km² overlap
Hog Island
IUCN VPrivate Conservation Land
11.51 km² overlap
Milford Neck Woods Fee
IUCN VPrivate Conservation Land
11.18 km² overlap
Cedar Island Macrosite
IUCN VPrivate Conservation Land
10.50 km² overlap
Clam Marshes
IUCN VPrivate Conservation Land
9.04 km² overlap
Marine Protected Area
8.11 km² overlap
Chincoteague Propo
IUCN IbProposed Wilderness
8.07 km² overlap
Fisherman Island
IUCN IVNational Wildlife Refuge
7.27 km² overlap
Marks and Jacks Islands
IUCN VState Natural Area Preserve
6.93 km² overlap
Fowling Point
IUCN VPrivate Conservation Land
6.79 km² overlap
Mink Island
IUCN VPrivate Conservation Land
5.45 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 471 distinct species · 4 503 087 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 Machipongo River : 23 espèces reliées par 86 interactions GloBI sur 3 types (connectance 15.3%, 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°
13,6°C
Annual rain
1 065mm
Moisture idx (CMI)
0,00
Runoff
504mm/an
PET
1 064mm
AET
820mm
Mean slope
0,5°
Water table
13cm
Forest
55%
Crops
50%
Urban
3%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)