HydroBASINS lev08 watershed · #4081141290
Bassin de Ponnaiyar
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 : Tiruvannamalai
Sub-basin area
38,5km²
Upstream area
11 372,8km²
Discharge
31,15m³/s
Mean elev.
192m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ponnaiyar317 km²
- Bassin · #4081141190288 km²
1 dept-equivalent regions (GADM L2)
- Tiruvannamalai38.3 km²100.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 distinct species · 8 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
28,2°C
Annual rain
984mm
Moisture idx (CMI)
-0,45
Runoff
206mm/an
PET
1 792mm
AET
832mm
Mean slope
2,8°
Water table
167cm
Forest
17%
Crops
60%
Urban
10%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)