HydroBASINS lev08 watershed · #7080759630
Bassin de Blanco 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 4 administrative regions : Blanco, Caldwell, Comal, Hays
Sub-basin area
536,4km²
Upstream area
1 137,8km²
Discharge
7,43m³/s
Mean elev.
317m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Blanco River432 km²
- Bassin de Little Blanco River170 km²
4 dept-equivalent regions (GADM L2)
- 477.7 km²89.2% of basin
- 50.4 km²9.4% of basin
- 7.7 km²1.4% of basin
- Caldwell0.0 km²0.0% of basin
6 intersecting protected areas
Lower Blanco River
IUCN VEasement
10.44 km² overlap
Nicholson Ranch
IUCN VPreserve
1.18 km² overlap
Blue Hole
IUCN VRegional Park
0.46 km² overlap
Blanco Shoals
IUCN VNatural Area
0.21 km² overlap
Blanco River
IUCN VEasement
0.20 km² overlap
Jacobs Well
IUCN VNatural Area
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 545 distinct species · 113 266 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 52 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 Blanco River : 39 espèces reliées par 121 interactions GloBI sur 4 types (connectance 9.1%, filtre Serrano α=0.2). 13 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°
19,2°C
Annual rain
866mm
Moisture idx (CMI)
-0,41
Runoff
203mm/an
PET
1 479mm
AET
732mm
Mean slope
2,7°
Water table
273cm
Forest
90%
Crops
8%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)