HydroBASINS lev08 watershed · #7080040970
Bassin de Big Elk 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 6 administrative regions : Cecil, Chester, Harford, Kent, New Castle +1
Sub-basin area
1 577,6km²
Upstream area
1 577,6km²
Discharge
8,53m³/s
Mean elev.
43m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 762.7 km²48.3% of basin
- 451.9 km²28.6% of basin
- 162.1 km²10.3% of basin
- 107.2 km²6.8% of basin
- 6.0 km²0.4% of basin
- 0.1 km²0.0% of basin
30 intersecting protected areas
Elk Neck
IUCN IIIState Park
9.09 km² overlap
Marine Protected Area
8.47 km² overlap
Eastern Neck
IUCN IVNational Wildlife Refuge
8.47 km² overlap
Sassafrass
IUCN VNatural Resource Management Area
3.80 km² overlap
White Clay Creek
IUCN VState Park
3.03 km² overlap
Brandywine Conservancy
IUCN Not AssignedEasement
2.06 km² overlap
Maryland Environmental Trust Easement #65
IUCN Not AssignedEasement
1.70 km² overlap
Maryland Environmental Trust Easement #14
IUCN Not AssignedEasement
1.45 km² overlap
Chrome Barrens
IUCN VLocal Conservation Area
0.90 km² overlap
21 more protected areassorted by overlap area
Peacedale
IUCN VPreserve
0.88 km² overlap
Marine Protected Area
0.70 km² overlap
Blackwater
IUCN IVNational Wildlife Refuge
0.70 km² overlap
Maryland Environmental Trust Easement #47
IUCN Not AssignedEasement
0.48 km² overlap
Maryland Environmental Trust Easement #85
IUCN Not AssignedEasement
0.40 km² overlap
Maryland Environmental Trust Easement #93
IUCN Not AssignedEasement
0.38 km² overlap
Chrome Barrens
IUCN VPrivate Conservation Land
0.25 km² overlap
Maryland Environmental Trust Easement #27
IUCN Not AssignedEasement
0.25 km² overlap
Big Elk Creek Woods
IUCN Not AssignedConservation Easement
0.21 km² overlap
Reserve Program
0.18 km² overlap
Golts Ponds
IUCN VHeritage Conservation
0.15 km² overlap
Maryland Environmental Trust Easement #28
IUCN Not AssignedEasement
0.15 km² overlap
Maryland Environmental Trust Easement #21
IUCN Not AssignedEasement
0.10 km² overlap
Maryland Environmental Trust Easement #99
IUCN Not AssignedEasement
0.09 km² overlap
Maryland Environmental Trust Easement #51
IUCN Not AssignedEasement
0.08 km² overlap
Unknown
IUCN VPark
0.07 km² overlap
O46Bc-Old Hilton Road
IUCN VPrivate Conservation
0.05 km² overlap
Private Conservation
0.05 km² overlap
Rock Hall Park Center (Family Dollar), Site Plan
IUCN Not AssignedPark
0.03 km² overlap
Wright Tract
IUCN VPreserve
0.00 km² overlap
A&S Properties, LLC, Major Subdivision
IUCN Not AssignedConservation Easement
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 975 distinct species · 900 738 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 Big Elk Creek : 24 espèces reliées par 74 interactions GloBI sur 3 types (connectance 14.0%, filtre Serrano α=0.2). 9 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°
12,3°C
Annual rain
1 100mm
Moisture idx (CMI)
0,01
Runoff
573mm/an
PET
1 091mm
AET
844mm
Mean slope
1,4°
Water table
80cm
Forest
72%
Crops
36%
Urban
4%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)