HydroBASINS lev08 watershed · #7080049150
Bassin de West Main Drain
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 : Cameron, Hidalgo, Kenedy, Willacy
Sub-basin area
3 143,5km²
Upstream area
3 143,8km²
Discharge
3,46m³/s
Mean elev.
25m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- Hidalgo1430.9 km²45.6% of basin
- 997.5 km²31.8% of basin
- 701.7 km²22.4% of basin
- Cameron6.1 km²0.2% of basin
5 intersecting protected areas
Marine Protected Area
101.04 km² overlap
Lower Rio Grande Valley
IUCN IVNational Wildlife Refuge
73.26 km² overlap
Lower Rio Grande Valley
IUCN VNational Wildlife Refuge
27.77 km² overlap
El Jardin & San Perlita
IUCN VEasement
26.00 km² overlap
Las Palomas
IUCN VWildlife Management Area
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 351 distinct species · 668 882 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 West Main Drain : 24 espèces reliées par 57 interactions GloBI sur 3 types (connectance 11.5%, filtre Serrano α=0.2). 8 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°
22,7°C
Annual rain
635mm
Moisture idx (CMI)
-0,59
Runoff
16mm/an
PET
1 539mm
AET
536mm
Mean slope
0,0°
Water table
28cm
Forest
3%
Crops
48%
Urban
7%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)