HydroBASINS lev08 watershed · #2080174830
Bassin de Sog
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 9 administrative regions : Borgarfjarðarsveit, Grímsnes- og Grafningshreppur, Hvalfjarðarstrandarhreppur, Kjósarhreppur, Laugardalshreppur +4
Sub-basin area
1 188,7km²
Upstream area
1 188,7km²
Discharge
69,11m³/s
Mean elev.
337m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
9 dept-equivalent regions (GADM L2)
- 614.7 km²51.4% of basin
- 487.9 km²40.8% of basin
- 37.9 km²3.2% of basin
- 27.6 km²2.3% of basin
- 14.9 km²1.2% of basin
- 7.4 km²0.6% of basin
- 2.9 km²0.2% of basin
- 2.4 km²0.2% of basin
1 moreFull L2 list
- Reykjavík0.7 km² · 0.1%
1 intersecting protected areas
Þingvellir
IUCN IINational Park
221.67 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 182 distinct species · 37 456 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Sog : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 5 types (connectance 14.7%, filtre Serrano α=0.2). 12 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°
2,9°C
Annual rain
1 102mm
Moisture idx (CMI)
0,71
Runoff
1 599mm/an
PET
322mm
AET
317mm
Mean slope
6,6°
Water table
0cm
Forest
0%
Crops
0%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)