HydroBASINS lev08 watershed · #2080059120
Bassin de Hólmsá
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 : Holta- og Landasveit, Mýrdalshreppur, Rangárvallahreppur, Skaftárhreppur
Sub-basin area
909,1km²
Upstream area
909,1km²
Discharge
79,01m³/s
Mean elev.
493m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 803.9 km²87.9% of basin
- 61.1 km²6.7% of basin
- 49.7 km²5.4% of basin
- 0.3 km²0.0% of basin
1 intersecting protected areas
Fjallabak
IUCN VNature Reserve
0.58 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
480 distinct species · 2 132 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 de Hólmsá : 15 espèces reliées par 52 interactions GloBI sur 4 types (connectance 16.0%, filtre Serrano α=0.2). 11 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°
2,6°C
Annual rain
1 597mm
Moisture idx (CMI)
0,80
Runoff
2 445mm/an
PET
323mm
AET
323mm
Mean slope
6,1°
Water table
0cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)