Ontologia

HydroBASINS lev08 watershed · #2080229570

Bassin de Holtåa

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 : Eidsvoll, Hurdal, Stange, Østre Toten

235% lakePfafstetter: 25102213

Sub-basin area

528,9km²

Upstream area

16 781,8km²

Discharge

277,76m³/s

Mean elev.

274m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Jøndalsåa173 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

19 intersecting protected areas

  • Vorma

    IUCN Not Reported

    Zoological Protection of Species

    3.74 km² overlap

  • Sulustaddalen

    IUCN Ia

    Nature Reserve

    2.91 km² overlap

  • Totenåsen

    IUCN Ia

    Nature Reserve

    2.64 km² overlap

  • Svartdalstjerna

    IUCN Ia

    Nature Reserve

    2.49 km² overlap

  • Totenvika

    IUCN Ia

    Nature Reserve

    1.59 km² overlap

  • Falken

    IUCN Not Reported

    Emerald Network

    1.35 km² overlap

  • Falken

    IUCN Ia

    Nature Reserve

    1.35 km² overlap

  • Svartdalstjerna

    IUCN Not Reported

    Emerald Network

    0.88 km² overlap

  • Fjæluelva

    IUCN Ia

    Nature Reserve

    0.52 km² overlap

10 more protected areas

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

Species present

5 052 distinct species · 135 286 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

135 286 obs · 20 cellules
Obs. / cellule
≥ 25 685
21 743–25 684
8 034–21 742
4 883–8 033
< 4 883

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

Ecological tissue

Sample of 26 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 Holtåa : 17 espèces reliées par 70 interactions GloBI sur 4 types (connectance 21.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
26
Interactions affichées
70
Connectance
0.215
Patrimoniales
0
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°

3,7°C

Annual rain

693mm

Moisture idx (CMI)

0,21

Runoff

483mm/an

PET

542mm

AET

441mm

Mean slope

6,0°

Water table

279cm

Forest

61%

Crops

24%

Urban

0%

Protected

2%

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