HydroBASINS lev08 watershed · #1080200650
Bassin de Oued Drâa ⴰⵙⵉⴼ ⵏ ⴷⵔⵄⴰ وادي درعة
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 : Assa-Zag, Guelmim, Tan-Tan
Sub-basin area
2 252,5km²
Upstream area
92 926,5km²
Discharge
238,85m³/s
Mean elev.
302m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
3 dept-equivalent regions (GADM L2)
- Guelmim1154.6 km²51.3% of basin
- 664.5 km²29.5% of basin
- Tan-Tan430.2 km²19.1% of basin
4 intersecting protected areas
Rouisset Tayssa Boulafraij Ouinskour et Oued Daraa
IUCN Not ApplicablePermanent Hunting Reserve
484.49 km² overlap
Embouchure du Draa
IUCN Not ApplicableBiological and Ecological Interest Site
235.64 km² overlap
Embouchure de l'Oued Dr'a
IUCN Not ReportedWetland of International Importance (Ramsar Site)
55.39 km² overlap
Msied - Abteh
IUCN Not ApplicablePermanent Hunting Reserve
52.47 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
244 distinct species · 1 017 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Drâa ⴰⵙⵉⴼ ⵏ ⴷⵔⵄⴰ وادي درعة : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 39 interactions GloBI sur 4 types (connectance 5.5%, 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°
19,4°C
Annual rain
102mm
Moisture idx (CMI)
-0,92
Runoff
49mm/an
PET
1 334mm
AET
88mm
Mean slope
6,8°
Water table
889cm
Forest
0%
Crops
0%
Urban
0%
Protected
36%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)