HydroBASINS lev08 watershed · #4081137710
Bassin de Palar
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 : Kancheepuram, Thiruvallur, Vellore
Sub-basin area
885,8km²
Upstream area
16 662km²
Discharge
66,82m³/s
Mean elev.
52m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Palar732 km²
- Bassin de Cheyyāru48 km²
3 dept-equivalent regions (GADM L2)
- 867.0 km²98.2% of basin
- 13.4 km²1.5% of basin
- Vellore2.0 km²0.2% of basin
1 intersecting protected areas
Karikili Bird Sanctuary
IUCN VWetland of International Importance (Ramsar Site)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
581 distinct species · 39 650 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Palar : 27 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 3 types (connectance 7.3%, 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°
28,4°C
Annual rain
1 110mm
Moisture idx (CMI)
-0,36
Runoff
422mm/an
PET
1 725mm
AET
891mm
Mean slope
0,6°
Water table
49cm
Forest
2%
Crops
53%
Urban
27%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)