HydroBASINS lev08 watershed · #1080143140
Bassin · #1080143140
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 across 2 countries : Erg Ferradj, Errachidia, Meridja
Sub-basin area
1 377,5km²
Upstream area
1 377,8km²
Discharge
1,1m³/s
Mean elev.
845m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Errachidia902.3 km²65.6% of basin
- 453.8 km²33.0% of basin
- 20.0 km²1.5% of basin
2 intersecting protected areas
Rissani
IUCN Not ApplicablePermanent Hunting Reserve
904.64 km² overlap
Réserve de Biosphère des Oasis du Sud Marocain (RBOSM)
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
898.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
118 distinct species · 478 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 · #1080143140 : 21 espèces reliées par 29 interactions GloBI sur 3 types (connectance 8.9%, filtre Serrano α=0.2). 5 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°
21,0°C
Annual rain
68mm
Moisture idx (CMI)
-0,96
Runoff
27mm/an
PET
1 723mm
AET
55mm
Mean slope
1,5°
Water table
548cm
Forest
0%
Crops
0%
Urban
0%
Protected
61%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)