Ontologia

HydroBASINS lev08 watershed · #2080166050

Bassin de Norðurá

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 3 administrative regions : Borgarbyggð, Bæjarhreppur, Dalabyggð

5% lakePfafstetter: 27102004

Sub-basin area

602km²

Upstream area

602,2km²

Discharge

23,6m³/s

Mean elev.

309m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Grafarlæk81 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

692 distinct species · 5 157 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

5 157 obs · 17 cellules
Obs. / cellule
≥ 1 316
957–1 315
203–956
156–202
< 156

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

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Norðurá : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 68 interactions GloBI sur 6 types (connectance 15.6%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
30
Interactions affichées
68
Connectance
0.156
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°

2,4°C

Annual rain

930mm

Moisture idx (CMI)

0,65

Runoff

1 201mm/an

PET

327mm

AET

310mm

Mean slope

7,8°

Water table

0cm

Forest

0%

Crops

0%

Urban

0%

Protected

0%

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