HydroBASINS lev08 watershed · #2080033930
Bassin de Mandalselva
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 13 administrative regions : Audnedal, Bygland, Evje og Hornnes, Hægebostad, Kvinesdal +8
Sub-basin area
1 802,3km²
Upstream area
1 802,3km²
Discharge
79,7m³/s
Mean elev.
550m
Administrative coverage
13 dept-equivalent regions (GADM L2)
- 762.5 km²42.1% of basin
- 346.0 km²19.1% of basin
- 285.4 km²15.8% of basin
- 117.3 km²6.5% of basin
- 86.5 km²4.8% of basin
- 72.9 km²4.0% of basin
- 53.9 km²3.0% of basin
- 27.6 km²1.5% of basin
14 intersecting protected areas
Protected Landscape
424.05 km² overlap
Setesdal Vesthei Ryfylkeheiane
IUCN Not ReportedEmerald Network
424.05 km² overlap
Hovassdalen
IUCN IaNature Reserve
11.99 km² overlap
Nautarheia
IUCN IaNature Reserve
1.06 km² overlap
Storslåtta
IUCN IaNature Reserve
0.50 km² overlap
Dåsvassdalen
IUCN IaNature Reserve
0.40 km² overlap
Heptedalen
IUCN IaNature Reserve
0.39 km² overlap
Linddalsfjellet og Sydalen
IUCN IaNature Reserve
0.21 km² overlap
Skorskog
IUCN IaNature Reserve
0.14 km² overlap
5 more protected areassorted by overlap area
Oksla
IUCN IaNature Reserve
0.07 km² overlap
Orlogskarten
IUCN IaNature Reserve
0.06 km² overlap
Kleveland
IUCN IaNature Reserve
0.06 km² overlap
Helvedesdalen
IUCN IaNature Reserve
0.05 km² overlap
Mandal kirkegård
IUCN Not ReportedNatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 770 distinct species · 210 227 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 Mandalselva : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 99 interactions GloBI sur 5 types (connectance 16.6%, 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°
4,0°C
Annual rain
1 540mm
Moisture idx (CMI)
0,73
Runoff
1 402mm/an
PET
410mm
AET
407mm
Mean slope
8,3°
Water table
355cm
Forest
66%
Crops
1%
Urban
0%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)