HydroBASINS lev08 watershed · #2080058710
Bassin de Hamarsá
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 : Austur-Hérað, Breiðdalshreppur, Djúpavogshreppur, Fljótsdalshreppur, Sveitarfélagið Hornafjörður
Sub-basin area
1 336,6km²
Upstream area
1 336,6km²
Discharge
8,76m³/s
Mean elev.
472m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 1071.4 km²79.6% of basin
- 210.3 km²15.6% of basin
- 17.8 km²1.3% of basin
- 5.3 km²0.4% of basin
- 2.4 km²0.2% of basin
5 intersecting protected areas
Teigarhorn
IUCN VPublic Recreation Area or Country Park
20.10 km² overlap
Vatnajökull National Park - Dynamic Nature of Fire and Ice
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
8.78 km² overlap
Lónsöræfi
IUCN IVNature Reserve
8.42 km² overlap
Teigarhorn
IUCN IIINatural Monument
2.14 km² overlap
Tjarnir á Innri - Hálsum
IUCN IVHabitat protection
1.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 375 distinct species · 23 063 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Hamarsá : 17 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 66 interactions GloBI sur 4 types (connectance 14.2%, filtre Serrano α=0.2). 14 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°
1,5°C
Annual rain
1 432mm
Moisture idx (CMI)
0,78
Runoff
1 552mm/an
PET
309mm
AET
308mm
Mean slope
13,1°
Water table
0cm
Forest
0%
Crops
0%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)