HydroBASINS lev08 watershed · #2080034350
Bassin de Førreelva
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 : Bykle, Finnøy, Hjelmeland, Suldal
Sub-basin area
1 267,3km²
Upstream area
1 267,3km²
Discharge
18,05m³/s
Mean elev.
558m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 548.0 km²43.0% of basin
- 495.9 km²38.9% of basin
- 109.1 km²8.6% of basin
- 38.8 km²3.0% of basin
28 intersecting protected areas
Dyraheio
IUCN Not ReportedEmerald Network
113.10 km² overlap
Dyraheio
IUCN IVProtected Landscape
113.10 km² overlap
Vormedalsheia
IUCN Not ReportedEmerald Network
83.46 km² overlap
Vormedalsheia
IUCN VProtected Landscape
69.56 km² overlap
Setesdal Vesthei Ryfylkeheiane
IUCN Not ReportedEmerald Network
23.73 km² overlap
Protected Landscape
23.68 km² overlap
Nordraheia
IUCN IaNature Reserve
17.85 km² overlap
Hålandsdalen
IUCN IaNature Reserve
7.08 km² overlap
Nord-Talgje
IUCN Not ReportedEmerald Network
1.84 km² overlap
19 more protected areassorted by overlap area
Nord-Talgje
IUCN IaNature Reserve
1.84 km² overlap
Lusaheia
IUCN VProtected Landscape
1.44 km² overlap
Norheimsøy og Lamholmen
IUCN Not ReportedEmerald Network
0.77 km² overlap
Norheimsøy og Lamholmen
IUCN IaNature Reserve
0.77 km² overlap
Øyna
IUCN IaNature Reserve
0.47 km² overlap
Øyastøl
IUCN IaNature Reserve
0.33 km² overlap
Lundarsøyla
IUCN IaNature Reserve
0.32 km² overlap
Hauskjevatnet
IUCN IaNature Reserve
0.22 km² overlap
Vestre Mjølsnesholmen
IUCN IaNature Reserve
0.16 km² overlap
Eikåsen
IUCN IaNature Reserve
0.05 km² overlap
Nesheim
IUCN IaNature Reserve
0.04 km² overlap
Reilstad - Grasholmen
IUCN IaNature Reserve
0.03 km² overlap
Barkeland
IUCN IaNature Reserve
0.03 km² overlap
Fisterfjell
IUCN IaNature Reserve
0.03 km² overlap
Hovda Grasholmen
IUCN IaNature Reserve
0.02 km² overlap
Kåda
IUCN IaNature Reserve
0.02 km² overlap
Kattholmen
IUCN IaNature Reserve
0.02 km² overlap
Moldfall
IUCN IaNature Reserve
0.01 km² overlap
Eide
IUCN Not ReportedNatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 800 distinct species · 83 862 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Førreelva : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 125 interactions GloBI sur 7 types (connectance 19.8%, 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°
3,9°C
Annual rain
1 963mm
Moisture idx (CMI)
0,79
Runoff
1 825mm/an
PET
406mm
AET
406mm
Mean slope
11,9°
Water table
481cm
Forest
53%
Crops
2%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)