HydroBASINS lev08 watershed · #7080636790
Bassin de Big Alamance 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 3 administrative regions : Alamance, Guilford, Randolph
Sub-basin area
672,9km²
Upstream area
673,1km²
Discharge
5,69m³/s
Mean elev.
207m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 420.4 km²62.5% of basin
- 241.1 km²35.8% of basin
- Randolph11.6 km²1.7% of basin
1 intersecting protected areas
Preserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 936 distinct species · 155 711 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Alamance Creek : 27 espèces reliées par 98 interactions GloBI sur 5 types (connectance 13.2%, filtre Serrano α=0.2). 12 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°
14,7°C
Annual rain
1 139mm
Moisture idx (CMI)
-0,09
Runoff
279mm/an
PET
1 257mm
AET
931mm
Mean slope
1,4°
Water table
84cm
Forest
19%
Crops
16%
Urban
11%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)