HydroBASINS lev08 watershed · #2080982720
Bassin de وادي السليل
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 3 administrative regions : Tathlith, Thar, Yadamah
Sub-basin area
253,4km²
Upstream area
253,6km²
Discharge
0,15m³/s
Mean elev.
1 574m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- YadamahNajran · Saudi Arabia190.4 km²75.4% of basin
- TharNajran · Saudi Arabia53.6 km²21.2% of basin
- 8.6 km²3.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
0 distinct species · 0 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
21,8°C
Annual rain
149mm
Moisture idx (CMI)
-0,92
Runoff
63mm/an
PET
1 831mm
AET
123mm
Mean slope
8,6°
Water table
686cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)