HydroBASINS lev08 watershed · #2080231900
Bassin de Jøndalsåa
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, Nesodden, Nord-Odal, Ullensaker
Sub-basin area
172,7km²
Upstream area
17 701,9km²
Discharge
292,95m³/s
Mean elev.
225m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Gjødingelva747 km²
- Bassin de Holtåa529 km²
4 dept-equivalent regions (GADM L2)
- 88.1 km²50.7% of basin
- 82.4 km²47.4% of basin
- 2.7 km²1.6% of basin
- 0.5 km²0.3% of basin
10 intersecting protected areas
Jøndalsåsen med flere tjern og vann
IUCN Not ReportedZoological Protection of Species
3.28 km² overlap
Vorma
IUCN Not ReportedZoological Protection of Species
3.19 km² overlap
Frilset
IUCN IaNature Reserve
1.45 km² overlap
Aurstadmåsan
IUCN IaNature Reserve
0.75 km² overlap
Aurstadmåsan
IUCN Not ReportedEmerald Network
0.75 km² overlap
Grenimåsan
IUCN Not ReportedEmerald Network
0.73 km² overlap
Grenimåsan
IUCN IaNature Reserve
0.71 km² overlap
Andelven, Nessa og Risa
IUCN Not ReportedZoological Protection of Species
0.10 km² overlap
Hatteråsen
IUCN IaNature Reserve
0.06 km² overlap
1 more protected areassorted by overlap area
Eidsvoll prestegård
IUCN IaNature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 815 distinct species · 24 137 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Jøndalsåa : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 7 types (connectance 12.2%, 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°
4,2°C
Annual rain
771mm
Moisture idx (CMI)
0,30
Runoff
509mm/an
PET
542mm
AET
453mm
Mean slope
4,4°
Water table
330cm
Forest
70%
Crops
19%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)