HydroBASINS lev08 watershed · #2080235660
Bassin de Drammenselva
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 2 administrative regions : Modum, Øvre Eiker
Sub-basin area
18,3km²
Upstream area
15 301,5km²
Discharge
280,9m³/s
Mean elev.
237m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Skjærdalselva1324 km²
- Bassin de Hallingdalselve1313 km²
2 dept-equivalent regions (GADM L2)
- 15.5 km²84.2% of basin
- 2.9 km²15.8% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 163 distinct species · 6 479 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Drammenselva : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 94 interactions GloBI sur 6 types (connectance 12.7%, filtre Serrano α=0.2). 12 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°
4,7°C
Annual rain
738mm
Moisture idx (CMI)
0,25
Runoff
636mm/an
PET
549mm
AET
448mm
Mean slope
6,9°
Water table
316cm
Forest
73%
Crops
0%
Urban
10%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)