HydroBASINS lev08 watershed · #4080028640
Bassin · #4080028640
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 2 administrative regions : Puducherry, Viluppuram
Sub-basin area
110,1km²
Upstream area
110,1km²
Discharge
1,47m³/s
Mean elev.
22m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Viluppuram64.3 km²58.6% of basin
- PuducherryPuducherry · India37.3 km²34.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 053 distinct species · 31 985 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 · #4080028640 : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 3 types (connectance 8.1%, 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°
28,2°C
Annual rain
1 158mm
Moisture idx (CMI)
-0,29
Runoff
421mm/an
PET
1 629mm
AET
872mm
Mean slope
0,8°
Water table
151cm
Forest
6%
Crops
58%
Urban
80%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)