HydroBASINS lev08 watershed · #7080722980
Bassin de Johnson Draw
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 2 administrative regions : Glasscock, Midland
Sub-basin area
87,1km²
Upstream area
4 539,6km²
Discharge
0,1m³/s
Mean elev.
793m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Johnson Draw1131 km²
- Bassin de Midland Draw82 km²
2 dept-equivalent regions (GADM L2)
- 64.2 km²73.8% of basin
- Midland22.8 km²26.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
46 distinct species · 101 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Johnson Draw : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 2 types (connectance 8.3%, filtre Serrano α=0.2). 3 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°
17,4°C
Annual rain
421mm
Moisture idx (CMI)
-0,72
Runoff
11mm/an
PET
1 531mm
AET
356mm
Mean slope
0,4°
Water table
85cm
Forest
0%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)