HydroBASINS lev08 watershed · #1080129960
Bassin de Oued Rheraya
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 : Al Haouz, Marrakech
Sub-basin area
471km²
Upstream area
471km²
Discharge
1,36m³/s
Mean elev.
1 532m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 385.0 km²81.8% of basin
- 85.6 km²18.2% of basin
8 intersecting protected areas
Toubkal - Ouirgane
IUCN Not ApplicablePermanent Hunting Reserve
98.21 km² overlap
Parc National de Toubkal
IUCN IINational Park
69.13 km² overlap
Centre Marrakech
IUCN Not ApplicablePermanent Hunting Reserve
68.71 km² overlap
Assifs Réghaya-Aït Mizane
IUCN Not ReportedWetland of International Importance (Ramsar Site)
8.26 km² overlap
Toubkal II
IUCN Not ApplicablePermanent Hunting Reserve
2.46 km² overlap
Assif n'Ouarzane
IUCN Not ApplicableBiological and Ecological Interest Site
2.33 km² overlap
Assif n'Ait Mizane
IUCN Not ApplicableBiological and Ecological Interest Site
1.41 km² overlap
Réserve de Biosphère de l'Arganeraie (RBA)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 903 distinct species · 43 616 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Oued Rheraya : 17 espèces reliées par 43 interactions GloBI sur 2 types (connectance 17.0%, filtre Serrano α=0.2). 6 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°
13,5°C
Annual rain
492mm
Moisture idx (CMI)
-0,62
Runoff
64mm/an
PET
1 392mm
AET
411mm
Mean slope
14,1°
Water table
840cm
Forest
11%
Crops
35%
Urban
9%
Protected
36%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)