HydroBASINS lev08 watershed · #2080177550
Bassin de Ytri-Rangá
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 7 administrative regions : Djúpárhreppur, Gnúpverjahreppur, Holta- og Landasveit, Rangárvallahreppur, Skeiðahreppur +2
Sub-basin area
923,6km²
Upstream area
7 283,3km²
Discharge
349,56m³/s
Mean elev.
290m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Þjórsá2894 km²
- Bassin de Helliskvísl325 km²
7 dept-equivalent regions (GADM L2)
- 416.0 km²44.8% of basin
- 332.8 km²35.8% of basin
- 101.4 km²10.9% of basin
- 55.9 km²6.0% of basin
- 17.9 km²1.9% of basin
- 5.1 km²0.5% of basin
- 0.5 km²0.0% of basin
3 intersecting protected areas
Svæði í Þjórsárdal
IUCN VProtected Landscape/Seascape
5.48 km² overlap
Oddaflóð
IUCN IVNature Reserve
4.86 km² overlap
Háifoss og Granni
IUCN IIINatural Monument
0.10 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
896 distinct species · 6 943 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Ytri-Rangá : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 5 types (connectance 11.4%, filtre Serrano α=0.2). 15 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°
3,4°C
Annual rain
1 322mm
Moisture idx (CMI)
0,76
Runoff
1 650mm/an
PET
319mm
AET
319mm
Mean slope
4,6°
Water table
0cm
Forest
0%
Crops
0%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)