HydroBASINS lev08 watershed · #4080029260
Bassin · #4080029260
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 : Ramanathapuram
Sub-basin area
546km²
Upstream area
546km²
Discharge
0,31m³/s
Mean elev.
16m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- Ramanathapuram527.1 km²96.9% of basin
1 intersecting protected areas
Gulf of Mannar Marine Biosphere Reserve
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.82 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
259 distinct species · 4 791 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 · #4080029260 : 15 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 3 types (connectance 13.0%, 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°
29,0°C
Annual rain
754mm
Moisture idx (CMI)
-0,53
Runoff
145mm/an
PET
1 602mm
AET
636mm
Mean slope
0,1°
Water table
22cm
Forest
3%
Crops
73%
Urban
9%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)