HydroBASINS lev08 watershed · #6080016860
Bassin de Arroyo Ñancay
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 : Gualeguaychú, Islas del Ibicuy
Sub-basin area
1 564,7km²
Upstream area
1 564,7km²
Discharge
18,08m³/s
Mean elev.
15m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 1408.5 km²90.1% of basin
- 155.5 km²9.9% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
653 distinct species · 121 159 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Arroyo Ñancay : 20 espèces reliées par 21 interactions GloBI sur 3 types (connectance 7.6%, filtre Serrano α=0.2). 4 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°
17,3°C
Annual rain
973mm
Moisture idx (CMI)
-0,28
Runoff
364mm/an
PET
1 342mm
AET
825mm
Mean slope
0,2°
Water table
23cm
Forest
25%
Crops
13%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)