HydroBASINS lev08 watershed · #1080125360
Bassin de Assif Melloul
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 4 administrative regions : Azilal, Béni Mellal, Errachidia, Ouarzazate
Sub-basin area
1 774,3km²
Upstream area
1 774,4km²
Discharge
10,07m³/s
Mean elev.
2 443m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Errachidia882.0 km²49.7% of basin
- Azilal724.8 km²40.9% of basin
- Ouarzazate165.2 km²9.3% of basin
- 1.1 km²0.1% of basin
10 intersecting protected areas
Réserve de Biosphère des Oasis du Sud Marocain (RBOSM)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
965.18 km² overlap
Réserve de Biosphère de la Cedraie de l'Atlas (RBCA)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
76.52 km² overlap
National Park
51.73 km² overlap
Parc National du Haut Atlas Oriental
IUCN Not ApplicablePermanent Hunting Reserve
50.46 km² overlap
Grotte d'Akhyam
IUCN Not ApplicableBiological and Ecological Interest Site
39.14 km² overlap
Tamga et Zaouiat Ahansal
IUCN Not ApplicablePermanent Hunting Reserve
29.04 km² overlap
Assoul
IUCN Not ApplicablePermanent Hunting Reserve
22.15 km² overlap
Assifs Ahançal-Melloul
IUCN Not ReportedWetland of International Importance (Ramsar Site)
5.37 km² overlap
Lacs Isly-Tislite
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.74 km² overlap
1 more protected areassorted by overlap area
Boutferda
IUCN Not ApplicablePermanent Hunting Reserve
0.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
358 distinct species · 1 469 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Assif Melloul : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 53 interactions GloBI sur 4 types (connectance 12.2%, 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°
9,5°C
Annual rain
522mm
Moisture idx (CMI)
-0,58
Runoff
167mm/an
PET
1 265mm
AET
443mm
Mean slope
15,3°
Water table
738cm
Forest
0%
Crops
4%
Urban
0%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)