HydroBASINS lev08 watershed · #2080000440
Bassin de נחל אלכסנדר
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 5 administrative regions : Jenin, Nablus, Qalqilya, Tubas, Tulkarm
Sub-basin area
1 937,8km²
Upstream area
1 937,8km²
Discharge
0,4m³/s
Mean elev.
181m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 303.0 km²15.6% of basin
- 258.5 km²13.3% of basin
- 124.7 km²6.4% of basin
- 61.9 km²3.2% of basin
- 7.7 km²0.4% of basin
30 intersecting protected areas
Har Ha Karmel
IUCN Not AssignedNational Park
31.38 km² overlap
Har Ha-Karmel
IUCN Not AssignedNature Reserve
19.68 km² overlap
Har HaKarmel harhava – Nahal Haruvim & Maharal
IUCN Not AssignedNature Reserve
8.30 km² overlap
Allona
IUCN Not AssignedNature Reserve
7.82 km² overlap
Har H-Karmel Harhava
IUCN Not AssignedNature Reserve
7.00 km² overlap
Batot Tanninim Raz
IUCN Not AssignedNature Reserve
5.18 km² overlap
Nahal Maharal
IUCN Not AssignedNature Reserve
3.96 km² overlap
Umm er Rihan
IUCN IVNature Reserve
3.70 km² overlap
Nahal Alexander
IUCN Not AssignedNational Park
3.01 km² overlap
21 more protected areassorted by overlap area
Har Shoqef
IUCN Not AssignedNational Park
2.71 km² overlap
Ya'ar Um Rehan
IUCN Not AssignedNature Reserve
2.67 km² overlap
Nahal Maharal (Harhava)
IUCN Not AssignedNature Reserve
2.25 km² overlap
Yam Dor Ha-Bonim
IUCN Not AssignedNature Reserve
1.51 km² overlap
Har Horshan (harhava)
IUCN Not AssignedNature Reserve
1.25 km² overlap
Hof Hasharon
IUCN Not AssignedNational Park
1.24 km² overlap
Zur Natan
IUCN Not AssignedNational Park
1.19 km² overlap
Yam Gador
IUCN Not AssignedNature Reserve
0.83 km² overlap
Hof Galim
IUCN Not AssignedNature Reserve
0.81 km² overlap
Nahal Daliyya Ve-Yuvallav
IUCN Not AssignedNature Reserve
0.76 km² overlap
El Miksar
IUCN IVNature Reserve
0.70 km² overlap
Hotem Ha-Karmel (harhava)
IUCN Not AssignedNature Reserve
0.59 km² overlap
Har HaKarmel Kelach-Galim (Harhava)
IUCN Not AssignedNature Reserve
0.58 km² overlap
Rosh Nahal Maharal
IUCN Not AssignedNature Reserve
0.58 km² overlap
Nahal Poleg
IUCN Not AssignedNature Reserve
0.48 km² overlap
Hof Gador
IUCN Not AssignedNature Reserve
0.47 km² overlap
Qesarya
IUCN Not AssignedNational Park
0.40 km² overlap
Hof Dor Ha-Bonim
IUCN Not AssignedNature Reserve
0.40 km² overlap
Har Amir
IUCN Not AssignedNature Reserve
0.38 km² overlap
Bureqa
IUCN Not AssignedNature Reserve
0.32 km² overlap
Har Horshan
IUCN Not AssignedNature Reserve
0.32 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 010 distinct species · 1 104 421 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 נחל אלכסנדר : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 75 interactions GloBI sur 4 types (connectance 10.7%, filtre Serrano α=0.2). 10 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°
19,7°C
Annual rain
568mm
Moisture idx (CMI)
-0,57
Runoff
233mm/an
PET
1 310mm
AET
477mm
Mean slope
4,6°
Water table
303cm
Forest
18%
Crops
49%
Urban
47%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)