HydroBASINS lev08 watershed · #4081152040
Bassin de Periyar river
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 2 administrative regions : Ernakulam, Idukki
Sub-basin area
228,2km²
Upstream area
2 770,7km²
Discharge
81,93m³/s
Mean elev.
457m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Mudirapuzha706 km²
- Bassin de Periyar2 km²
2 dept-equivalent regions (GADM L2)
- 219.6 km²96.6% of basin
- 7.7 km²3.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 060 distinct species · 210 388 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Periyar river : 18 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 23 interactions GloBI sur 3 types (connectance 9.1%, filtre Serrano α=0.2). 5 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°
25,4°C
Annual rain
2 803mm
Moisture idx (CMI)
0,45
Runoff
1 591mm/an
PET
1 495mm
AET
1 210mm
Mean slope
14,7°
Water table
648cm
Forest
94%
Crops
70%
Urban
5%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)