HydroBASINS lev08 watershed · #4081148240
Bassin de Noyyal
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 6 administrative regions : Coimbatore, Erode, Karur, Namakkal, Palakkad +1
Sub-basin area
3 540km²
Upstream area
3 540,1km²
Discharge
21,91m³/s
Mean elev.
366m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- Tiruppur1797.2 km²51.0% of basin
- Coimbatore808.0 km²22.9% of basin
- Erode696.5 km²19.8% of basin
- Karur209.3 km²5.9% of basin
- 12.3 km²0.3% of basin
- Namakkal2.6 km²0.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 466 distinct species · 1 129 687 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Noyyal : 21 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 3 types (connectance 8.9%, filtre Serrano α=0.2). 11 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°
26,8°C
Annual rain
669mm
Moisture idx (CMI)
-0,60
Runoff
206mm/an
PET
1 693mm
AET
558mm
Mean slope
1,8°
Water table
218cm
Forest
25%
Crops
74%
Urban
33%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)