HydroBASINS lev08 watershed · #2080033940
Bassin de Lygna
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 : Audnedal, Farsund, Hægebostad, Kvinesdal, Lindesnes +4
Sub-basin area
1 875,6km²
Upstream area
1 875,6km²
Discharge
4,3m³/s
Mean elev.
260m
Administrative coverage
9 dept-equivalent regions (GADM L2)
- 415.1 km²22.0% of basin
- 400.1 km²21.2% of basin
- 327.0 km²17.3% of basin
- 298.6 km²15.8% of basin
- 189.5 km²10.1% of basin
- 85.7 km²4.5% of basin
- 63.8 km²3.4% of basin
- 18.9 km²1.0% of basin
1 moreFull L2 list
- Åseral14.0 km² · 0.7%
30 intersecting protected areas
Protected Landscape
85.64 km² overlap
Setesdal Vesthei Ryfylkeheiane
IUCN Not ReportedEmerald Network
85.64 km² overlap
Listastrendene
IUCN Not ReportedEmerald Network
15.54 km² overlap
Lista Wetlands System
IUCN Not ReportedWetland of International Importance (Ramsar Site)
10.69 km² overlap
Listastrendene
IUCN VProtected Landscape
7.45 km² overlap
Vassland
IUCN IaNature Reserve
6.46 km² overlap
Framvaren
IUCN Not ReportedMarine Protected Area (OSPAR)
5.55 km² overlap
Framvaren
IUCN Not ReportedMarine Protected Area
5.54 km² overlap
Hanangervann og Kråkenesvann (Farsund)
IUCN Not ReportedEmerald Network
2.56 km² overlap
21 more protected areassorted by overlap area
Hanangervann og Kråkenesvann
IUCN IVProtected Landscape
2.56 km² overlap
Steinodden
IUCN IVWildlife Conservation Area
2.04 km² overlap
Kviljo
IUCN IVBotanical Conservation Area
1.54 km² overlap
Nesheimvann
IUCN Not ReportedEmerald Network
1.48 km² overlap
Nesheimvann
IUCN IaNature Reserve
1.48 km² overlap
Landdalen
IUCN IaNature Reserve
1.35 km² overlap
Einarsneset
IUCN IVWildlife/Botanical Conservation Area
1.19 km² overlap
Nordhasselvika
IUCN IVWildlife Conservation Area
1.14 km² overlap
Geislafoss
IUCN IaNature Reserve
0.92 km² overlap
Fiskelandsvatn
IUCN IaNature Reserve
0.77 km² overlap
Nedre Lyngdalselva
IUCN IVWildlife Conservation Area
0.76 km² overlap
Nedre Audna
IUCN IaNature Reserve
0.73 km² overlap
Eventyrskogen
IUCN IaNature Reserve
0.69 km² overlap
Ulgjelsvann
IUCN IaNature Reserve
0.59 km² overlap
Ulgjelsvann
IUCN Not ReportedEmerald Network
0.59 km² overlap
Havika
IUCN IVWildlife Conservation Area
0.56 km² overlap
Listeid
IUCN Not ReportedEmerald Network
0.52 km² overlap
Listeid
IUCN IaNature Reserve
0.52 km² overlap
Grønslåtta
IUCN IaNature Reserve
0.49 km² overlap
Kviljo
IUCN IVWildlife/Botanical Conservation Area
0.48 km² overlap
Slevdalsvannet
IUCN IaNature Reserve
0.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 266 distinct species · 2 053 690 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Lygna : 20 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 67 interactions GloBI sur 4 types (connectance 17.7%, filtre Serrano α=0.2). 8 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°
5,9°C
Annual rain
1 590mm
Moisture idx (CMI)
0,74
Runoff
1 687mm/an
PET
419mm
AET
417mm
Mean slope
8,2°
Water table
310cm
Forest
70%
Crops
6%
Urban
1%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)