HydroBASINS lev08 watershed · #5080403110
Bassin de Dawson 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 1 administrative regions : Banana
Sub-basin area
1 302,4km²
Upstream area
29 260,8km²
Discharge
18,38m³/s
Mean elev.
173m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Lonesome Creek546 km²
- Bassin de Dawson River2 km²
1 dept-equivalent regions (GADM L2)
- 1299.6 km²100.0% of basin
4 intersecting protected areas
Isla Gorge
IUCN IINational Park
26.66 km² overlap
Willawa
IUCN VINature Refuge
3.76 km² overlap
Highworth Bend
IUCN IIIConservation Park
0.52 km² overlap
Dawson River
IUCN IIIConservation Park
0.50 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 327 distinct species · 13 581 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Dawson River : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 45 interactions GloBI sur 4 types (connectance 6.4%, filtre Serrano α=0.2). 7 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°
21,0°C
Annual rain
668mm
Moisture idx (CMI)
-0,61
Runoff
19mm/an
PET
1 724mm
AET
563mm
Mean slope
1,9°
Water table
279cm
Forest
8%
Crops
1%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)