HydroBASINS lev08 watershed · #1080132170
Bassin de Ousilkane
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 : Errachidia, Ouarzazate
Sub-basin area
826,9km²
Upstream area
827km²
Discharge
1,37m³/s
Mean elev.
1 315m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Errachidia539.5 km²65.3% of basin
- Ouarzazate286.7 km²34.7% of basin
2 intersecting protected areas
Réserve de Biosphère des Oasis du Sud Marocain (RBOSM)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
826.22 km² overlap
Alnif
IUCN Not ApplicablePermanent Hunting Reserve
303.79 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
190 distinct species · 885 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Ousilkane : 24 espèces reliées par 50 interactions GloBI sur 3 types (connectance 12.3%, filtre Serrano α=0.2). 5 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°
17,3°C
Annual rain
131mm
Moisture idx (CMI)
-0,92
Runoff
59mm/an
PET
1 613mm
AET
110mm
Mean slope
6,6°
Water table
653cm
Forest
0%
Crops
0%
Urban
1%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)