Ontologia

HydroBASINS lev08 watershed · #1080030700

Bassin de Oued El Harrach

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 36 administrative regions : Aissaouia, Baata, Baraki, Birtouta, Bordj El Kiffan +31

Pfafstetter: 15305108

Sub-basin area

1 098km²

Upstream area

1 098km²

Discharge

7,24m³/s

Mean elev.

448m

Administrative coverage

36 dept-equivalent regions (GADM L2)

28 more

2 intersecting protected areas

  • Chréa

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    151.75 km² overlap

  • Chréa

    IUCN II

    National Park

    121.52 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

1 209 distinct species · 5 235 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

5 235 obs · 23 cellules
Obs. / cellule
≥ 1 513
760–1 512
92–759
60–91
< 60

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 51 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Oued El Harrach : 41 espèces reliées par 106 interactions GloBI sur 5 types (connectance 8.0%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
52
Interactions affichées
106
Connectance
0.080
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

16,1°C

Annual rain

716mm

Moisture idx (CMI)

-0,34

Runoff

177mm/an

PET

1 088mm

AET

587mm

Mean slope

10,7°

Water table

492cm

Forest

51%

Crops

39%

Urban

41%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)