Rivière· 38 segments
Vellar
Crosses 4 administrative regions : Cuddalore, Namakkal, Salem, Viluppuram
Total length
114km
Max discharge
44,7m³/s
Max Strahler
5
Segments matched
38
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- SalemTamil Nadu · India120.5 kmin this dpt
- CuddaloreTamil Nadu · India66.8 kmin this dpt
- ViluppuramTamil Nadu · India19.1 kmin this dpt
- NamakkalTamil Nadu · India0.0 kmin this dpt
1 page = 1 named river (aggregation of 38 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
40 distinct species · 100 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 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 Vellar : 15 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 13 interactions GloBI sur 3 types (connectance 9.6%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
114km
Max discharge
44,7m³/s
Max Strahler
5
Segments matched
38
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.