Ontologia

HydroBASINS lev08 watershed · #4081131960

Bassin de Kortalaiyar

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 4 administrative regions : Chittoor, Kancheepuram, Thiruvallur, Vellore

Pfafstetter: 45375084

Sub-basin area

1 217,9km²

Upstream area

1 217,9km²

Discharge

9,45m³/s

Mean elev.

137m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Kosasthalaiyar River662 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

296 distinct species · 11 689 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

11 689 obs · 31 cellules
Obs. / cellule
≥ 6 683
448–6 682
93–447
50–92
< 50

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

Ecological tissue

Sample of 33 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 Kortalaiyar : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 52 interactions GloBI sur 3 types (connectance 9.8%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
52
Connectance
0.099
Patrimoniales
1
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°

28,2°C

Annual rain

1 002mm

Moisture idx (CMI)

-0,43

Runoff

266mm/an

PET

1 760mm

AET

844mm

Mean slope

1,3°

Water table

105cm

Forest

5%

Crops

69%

Urban

22%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)