HydroBASINS lev08 watershed · #7080702620
Bassin de Elm Fork Trinity 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 7 administrative regions : Collin, Cooke, Dallas, Denton, Grayson +2
Sub-basin area
4 493,8km²
Upstream area
4 493,8km²
Discharge
25,65m³/s
Mean elev.
231m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- 1907.1 km²42.5% of basin
- 1534.8 km²34.2% of basin
- Grayson492.7 km²11.0% of basin
- 269.7 km²6.0% of basin
- 242.2 km²5.4% of basin
- 36.8 km²0.8% of basin
- Dallas8.6 km²0.2% of basin
1 intersecting protected areas
Arbor Hills
IUCN VNature Preserve
0.79 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 906 distinct species · 997 870 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 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 Elm Fork Trinity River : 33 espèces reliées par 93 interactions GloBI sur 5 types (connectance 9.4%, 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°
17,6°C
Annual rain
942mm
Moisture idx (CMI)
-0,32
Runoff
181mm/an
PET
1 394mm
AET
797mm
Mean slope
1,0°
Water table
113cm
Forest
2%
Crops
35%
Urban
12%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)