HydroBASINS lev08 watershed · #6080925130
Bassin de Arroyo Chico
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 : General Juan Madariaga, Mar Chiquita, Villa Gesell
Sub-basin area
339,4km²
Upstream area
4 414,2km²
Discharge
42,36m³/s
Mean elev.
2m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Arroyo Grande1087 km²
- Bassin de Arroyo Chico804 km²
3 dept-equivalent regions (GADM L2)
- 262.2 km²77.2% of basin
- 34.5 km²10.1% of basin
- 10.2 km²3.0% of basin
4 intersecting protected areas
Mar Chiquita
IUCN VIWildlife Refuge
295.47 km² overlap
Parque Atlántico Mar Chiquito
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
208.74 km² overlap
Mar Chiquita
IUCN VIMultiple Use Nature Reserve
51.48 km² overlap
Mar Chiquita - Dragones de Malvinas
IUCN Not ReportedNature Reserve of Defense
5.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
363 distinct species · 24 464 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 Arroyo Chico : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 21 interactions GloBI sur 3 types (connectance 8.3%, 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).
Hydroclimate (BasinATLAS lev08)
Mean T°
14,1°C
Annual rain
820mm
Moisture idx (CMI)
-0,27
Runoff
336mm/an
PET
1 118mm
AET
697mm
Mean slope
0,0°
Water table
5cm
Forest
21%
Crops
14%
Urban
0%
Protected
73%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)