HydroBASINS lev08 watershed · #4081140210
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 3 administrative regions : Chittoor, Dharmapuri, Krishnagiri
Sub-basin area
758,6km²
Upstream area
5 858,5km²
Discharge
7,52m³/s
Mean elev.
527m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Markandeya1429 km²
- Bassin de Ponnaiyar33 km²
3 dept-equivalent regions (GADM L2)
- Krishnagiri733.0 km²97.0% of basin
- Dharmapuri21.0 km²2.8% of basin
- Chittoor1.7 km²0.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
356 distinct species · 19 017 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 de Ponnaiyar : 20 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 3 types (connectance 10.1%, 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°
26,3°C
Annual rain
803mm
Moisture idx (CMI)
-0,54
Runoff
113mm/an
PET
1 757mm
AET
677mm
Mean slope
3,7°
Water table
313cm
Forest
6%
Crops
71%
Urban
25%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)