Ontologia

HydroBASINS lev08 watershed · #2080240540

Bassin de Sagån

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 5 administrative regions : Avesta, Enköping, Heby, Sala, Västerås

30% lakePfafstetter: 24472040

Sub-basin area

1 171,1km²

Upstream area

1 171,2km²

Discharge

8,17m³/s

Mean elev.

67m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Fiskviks kanal2206 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

  • 2001338 Ängsö

    IUCN IV

    Nature Reserve

    12.78 km² overlap

  • Ängsö

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    12.78 km² overlap

  • Ängsö

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    12.78 km² overlap

  • Ängsö

    IUCN IV

    Natura 2000 SCI

    12.78 km² overlap

  • Ängsö

    IUCN IV

    Natura 2000 SPA

    12.78 km² overlap

  • Färnebofjärden

    IUCN Ia

    Wetland of International Importance (Ramsar Site)

    7.75 km² overlap

  • Ölstabrändan

    IUCN Ia

    Natura 2000 SCI

    2.92 km² overlap

  • Ölstabrändan

    IUCN Ia

    Natura 2000 SPA

    2.92 km² overlap

  • Ölstabrändan

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    2.92 km² overlap

21 more protected areas

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

Species present

8 630 distinct species · 397 843 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

397 843 obs · 46 cellules
Obs. / cellule
≥ 73 759
16 444–73 758
10 179–16 443
6 003–10 178
< 6 003

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 Sagån : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 3 types (connectance 18.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
84
Connectance
0.181
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°

5,5°C

Annual rain

591mm

Moisture idx (CMI)

0,01

Runoff

240mm/an

PET

586mm

AET

435mm

Mean slope

1,8°

Water table

118cm

Forest

61%

Crops

22%

Urban

1%

Protected

2%

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