HydroBASINS lev08 watershed · #1080107220
Bassin de Oued Mellah
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 : Ben Slimane, Casablanca, Settat
Sub-basin area
509,8km²
Upstream area
1 961,3km²
Discharge
2,6m³/s
Mean elev.
226m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #1080109500265 km²
- Bassin · #1080109550131 km²
3 dept-equivalent regions (GADM L2)
- Ben Slimane471.3 km²92.5% of basin
- Settat31.4 km²6.2% of basin
- 6.9 km²1.4% of basin
5 intersecting protected areas
Grand Casablanca
IUCN Not ApplicablePermanent Hunting Reserve
8.14 km² overlap
Barrage Oued El Maleh
IUCN Not ApplicableBiological and Ecological Interest Site
4.47 km² overlap
Zones humides de l'Oued El Maleh
IUCN Not ReportedWetland of International Importance (Ramsar Site)
4.28 km² overlap
Barrage Oued El maleh
IUCN Not ApplicablePermanent Hunting Reserve
4.23 km² overlap
Al Gara
IUCN Not ApplicablePermanent Hunting Reserve
0.62 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
114 distinct species · 476 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Mellah : 25 espèces reliées par 41 interactions GloBI sur 5 types (connectance 8.8%, 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°
17,7°C
Annual rain
414mm
Moisture idx (CMI)
-0,69
Runoff
57mm/an
PET
1 359mm
AET
350mm
Mean slope
2,4°
Water table
386cm
Forest
0%
Crops
97%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)