Ontologia

HydroBASINS lev08 watershed · #4081153080

Bassin de Periyar Main Canal

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 : Dindigul, Madurai, Sivaganga

Pfafstetter: 45390203

Sub-basin area

1 306,9km²

Upstream area

4 911,6km²

Discharge

32,54m³/s

Mean elev.

288m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Vaigai1041 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

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

Species present

946 distinct species · 83 120 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

83 120 obs · 34 cellules
Obs. / cellule
≥ 21 181
7 796–21 180
1 353–7 795
757–1 352
< 757

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

Ecological tissue

Sample of 38 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 Periyar Main Canal : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 49 interactions GloBI sur 4 types (connectance 7.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
49
Connectance
0.070
Patrimoniales
2
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°

27,8°C

Annual rain

825mm

Moisture idx (CMI)

-0,52

Runoff

141mm/an

PET

1 726mm

AET

696mm

Mean slope

4,3°

Water table

241cm

Forest

29%

Crops

58%

Urban

12%

Protected

0%

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