Ontologia

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

16% lakePfafstetter: 45378070

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

3 dept-equivalent regions (GADM L2)

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.

Densité d'observations

19 017 obs · 21 cellules
Obs. / cellule
≥ 8 147
1 729–8 146
579–1 728
284–578
< 284

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

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).

Espèces affichées
28
Interactions affichées
38
Connectance
0.101
Patrimoniales
3
Plus dense que (national)0 %(top 100%)

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)