HydroBASINS lev08 watershed · #2080236220
Bassin de Leira
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 16 administrative regions : Enebakk, Fet, Gjerdrum, Gran, Hurdal +11
Sub-basin area
1 201,6km²
Upstream area
1 201,6km²
Discharge
20,91m³/s
Mean elev.
330m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
16 dept-equivalent regions (GADM L2)
- 262.8 km²21.7% of basin
- 193.6 km²16.0% of basin
- 174.5 km²14.4% of basin
- 113.9 km²9.4% of basin
- 91.6 km²7.6% of basin
- 84.2 km²7.0% of basin
- 72.7 km²6.0% of basin
- 62.8 km²5.2% of basin
30 intersecting protected areas
Nordre Oyeren
IUCN IaWetland of International Importance (Ramsar Site)
19.68 km² overlap
Nordre Øyeren
IUCN Not ReportedEmerald Network
18.96 km² overlap
Nordre Øyeren
IUCN IaNature Reserve
17.84 km² overlap
Østmarka
IUCN IINational Park
13.28 km² overlap
Nature Reserve
10.65 km² overlap
Østmarka
IUCN Not ReportedEmerald Network
8.45 km² overlap
Rundkollen og Sortungsbekken
IUCN IaNature Reserve
5.08 km² overlap
Romerike
IUCN VProtected Landscape
5.01 km² overlap
Rudskampen og Råbjørn
IUCN IaNature Reserve
3.90 km² overlap
21 more protected areassorted by overlap area
Paradiskollen
IUCN IaNature Reserve
3.75 km² overlap
Pipra og Storrsjøhøgda
IUCN IaNature Reserve
3.58 km² overlap
Gullenhaugen
IUCN IaNature Reserve
3.55 km² overlap
Marifjell
IUCN IaNature Reserve
3.45 km² overlap
Prekestolen og Ryggevanna
IUCN IaNature Reserve
3.32 km² overlap
Århanemyra
IUCN IaNature Reserve
2.95 km² overlap
Fjellsjøhøgda
IUCN IaNature Reserve
2.69 km² overlap
Ramstadslottet
IUCN IaNature Reserve
2.24 km² overlap
Ramndalen
IUCN IaNature Reserve
2.16 km² overlap
Skotjernfjellet
IUCN Not ReportedEmerald Network
2.09 km² overlap
Rundkollen
IUCN Not ReportedEmerald Network
1.86 km² overlap
Avrillen
IUCN IaNature Reserve
1.74 km² overlap
Rinilhaugen
IUCN IaNature Reserve
1.62 km² overlap
Gjerimåsan
IUCN IaNature Reserve
1.48 km² overlap
Kongsrudtjern
IUCN IaNature Reserve
1.31 km² overlap
Høgsmåsan og Geitåsen
IUCN IaNature Reserve
1.14 km² overlap
Sørumsneset
IUCN IaNature Reserve
1.12 km² overlap
Nordbytjern
IUCN VProtected Landscape
0.84 km² overlap
Sogna
IUCN IaNature Reserve
0.73 km² overlap
Tullebrennhaugen
IUCN IaNature Reserve
0.69 km² overlap
Stilla og Brauterstilla
IUCN IaNature Reserve
0.59 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 123 distinct species · 611 475 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Leira : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 5 types (connectance 15.0%, filtre Serrano α=0.2). 9 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°
3,9°C
Annual rain
795mm
Moisture idx (CMI)
0,33
Runoff
564mm/an
PET
534mm
AET
453mm
Mean slope
5,9°
Water table
315cm
Forest
74%
Crops
29%
Urban
9%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)