HydroBASINS lev08 watershed · #2080070800
Bassin de رودخانه چالوس
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 4 administrative regions : Chalus, Karaj, Nur, Savojbolagh
Sub-basin area
1 742,1km²
Upstream area
1 742,1km²
Discharge
19,9m³/s
Mean elev.
1 968m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 1313.3 km²75.4% of basin
- 379.9 km²21.8% of basin
- 41.1 km²2.4% of basin
- 8.2 km²0.5% of basin
1 intersecting protected areas
Hyrcanian Forests
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
68.67 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
807 distinct species · 3 805 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 رودخانه چالوس : 21 espèces reliées par 57 interactions GloBI sur 5 types (connectance 16.2%, filtre Serrano α=0.2). 6 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°
10,2°C
Annual rain
332mm
Moisture idx (CMI)
-0,71
Runoff
342mm/an
PET
1 147mm
AET
282mm
Mean slope
22,5°
Water table
858cm
Forest
30%
Crops
15%
Urban
1%
Protected
71%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)