HydroBASINS lev08 watershed · #7080770710
Bassin de San Antonio 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 3 administrative regions : Bexar, Karnes, Wilson
Sub-basin area
1 490,9km²
Upstream area
5 976,7km²
Discharge
17,43m³/s
Mean elev.
141m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Salado Creek1058 km²
- Bassin de Medina River129 km²
3 dept-equivalent regions (GADM L2)
- Wilson873.8 km²58.7% of basin
- 314.7 km²21.1% of basin
- 300.5 km²20.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 796 distinct species · 208 140 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 San Antonio River : 25 espèces reliées par 76 interactions GloBI sur 4 types (connectance 11.4%, filtre Serrano α=0.2). 12 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°
20,8°C
Annual rain
710mm
Moisture idx (CMI)
-0,54
Runoff
99mm/an
PET
1 557mm
AET
600mm
Mean slope
0,9°
Water table
124cm
Forest
2%
Crops
36%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)