HydroBASINS lev08 watershed · #4080029110
Bassin · #4080029110
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 : Pudukkottai, Ramanathapuram, Sivaganga
Sub-basin area
455,1km²
Upstream area
455,1km²
Discharge
0,36m³/s
Mean elev.
20m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- Ramanathapuram372.5 km²82.2% of basin
- Sivaganga69.0 km²15.2% of basin
- Pudukkottai3.8 km²0.8% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
165 distinct species · 2 688 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 · #4080029110 : 20 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 3 types (connectance 11.7%, filtre Serrano α=0.2). 7 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°
28,8°C
Annual rain
890mm
Moisture idx (CMI)
-0,43
Runoff
171mm/an
PET
1 566mm
AET
750mm
Mean slope
0,0°
Water table
7cm
Forest
21%
Crops
60%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)