HydroBASINS lev08 watershed · #4081010920
Bassin de Arpa
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 1 administrative regions : Bilaspur
Sub-basin area
405,1km²
Upstream area
3 340,8km²
Discharge
55,27m³/s
Mean elev.
266m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Kharang River1000 km²
- Bassin de Arpa598 km²
1 dept-equivalent regions (GADM L2)
- Bilaspur404.0 km²100.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
262 distinct species · 3 216 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 Arpa : 25 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 40 interactions GloBI sur 4 types (connectance 7.6%, filtre Serrano α=0.2). 8 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°
26,9°C
Annual rain
1 245mm
Moisture idx (CMI)
-0,28
Runoff
506mm/an
PET
1 730mm
AET
809mm
Mean slope
0,3°
Water table
30cm
Forest
0%
Crops
46%
Urban
21%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)