HydroBASINS lev08 watershed · #1080148320
Bassin de Oued el Ma'der
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 1 administrative regions : Errachidia
Sub-basin area
63,1km²
Upstream area
12 149,7km²
Discharge
9m³/s
Mean elev.
659m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Qued Chouiref1184 km²
- Bassin de Oued el Ma'der343 km²
1 dept-equivalent regions (GADM L2)
- Errachidia63.1 km²100.0% of basin
2 intersecting protected areas
Rissani
IUCN Not ApplicablePermanent Hunting Reserve
63.05 km² overlap
Réserve de Biosphère des Oasis du Sud Marocain (RBOSM)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
63.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 distinct species · 6 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°
22,3°C
Annual rain
49mm
Moisture idx (CMI)
-0,97
Runoff
29mm/an
PET
1 828mm
AET
39mm
Mean slope
2,8°
Water table
276cm
Forest
0%
Crops
0%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)