Ontologia

HydroBASINS lev08 watershed · #2080033670

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 14 administrative regions : Drammen, Flesberg, Hof, Holmestrand, Kongsberg +9

50% lakePfafstetter: 25104010

Sub-basin area

997,2km²

Upstream area

17 189,2km²

Discharge

319,13m³/s

Mean elev.

264m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

14 dept-equivalent regions (GADM L2)

6 more

30 intersecting protected areas

21 more protected areas

  • Bremsåsen

    IUCN Ia

    Nature Reserve

    0.70 km² overlap

  • Bremsåsen

    IUCN Not Reported

    Emerald Network

    0.70 km² overlap

  • Solbergfjellet

    IUCN Ia

    Nature Reserve

    0.69 km² overlap

  • Solbergfjellet

    IUCN Not Reported

    Emerald Network

    0.69 km² overlap

  • Austadmarka

    IUCN Ia

    Nature Reserve

    0.68 km² overlap

  • Kolbergtjernmyra

    IUCN Ia

    Nature Reserve

    0.54 km² overlap

  • Leitjernsfjellet

    IUCN Ia

    Nature Reserve

    0.40 km² overlap

  • Veia

    IUCN Ia

    Nature Reserve

    0.39 km² overlap

  • Klippa

    IUCN Ia

    Nature Reserve

    0.27 km² overlap

  • St. Hansåsen

    IUCN Ia

    Nature Reserve

    0.23 km² overlap

  • Granslia

    IUCN Ia

    Nature Reserve

    0.22 km² overlap

  • Sandsbakken

    IUCN Ia

    Nature Reserve

    0.09 km² overlap

  • Tjønna

    IUCN Ia

    Nature Reserve

    0.09 km² overlap

  • Hillestadåsen

    IUCN Ia

    Nature Reserve

    0.07 km² overlap

  • Høymyr

    IUCN Not Reported

    Emerald Network

    0.05 km² overlap

  • Høymyr

    IUCN Ia

    Nature Reserve

    0.05 km² overlap

  • Trestikle

    IUCN Ia

    Nature Reserve

    0.05 km² overlap

  • Bergan

    IUCN Ia

    Nature Reserve

    0.03 km² overlap

  • Austad

    IUCN Not Reported

    Natural Monument

    0.02 km² overlap

  • Hamrefjell

    IUCN Ia

    Nature Reserve

    0.02 km² overlap

  • Stavlum

    IUCN Ia

    Nature Reserve

    0.02 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

11 748 distinct species · 586 308 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

586 308 obs · 39 cellules
Obs. / cellule
≥ 123 031
42 907–123 030
16 224–42 906
3 649–16 223
< 3 649

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Drammenselva : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 5 types (connectance 14.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
89
Connectance
0.141
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

4,8°C

Annual rain

753mm

Moisture idx (CMI)

0,29

Runoff

642mm/an

PET

531mm

AET

442mm

Mean slope

7,2°

Water table

337cm

Forest

74%

Crops

4%

Urban

7%

Protected

1%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)