HydroBASINS lev08 watershed · #2080241720
Bassin de Rakkestadelva
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 : Aremark, Eidsberg, Halden, Marker, Rakkestad
Sub-basin area
468,2km²
Upstream area
468,3km²
Discharge
7,41m³/s
Mean elev.
158m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 374.0 km²79.4% of basin
- 52.3 km²11.1% of basin
- 35.0 km²7.4% of basin
- 5.4 km²1.2% of basin
- 4.1 km²0.9% of basin
12 intersecting protected areas
Svenken
IUCN Not ReportedEmerald Network
11.60 km² overlap
Fjella
IUCN IaNature Reserve
11.60 km² overlap
Askevann
IUCN IaNature Reserve
1.06 km² overlap
Bøensmosen og Berbymosen
IUCN IaNature Reserve
0.85 km² overlap
Bøensmosen og Berbymosen
IUCN Not ReportedEmerald Network
0.85 km² overlap
Hiesten
IUCN IaNature Reserve
0.84 km² overlap
Stiksåsen
IUCN IaNature Reserve
0.77 km² overlap
Gyrihelleren
IUCN IaNature Reserve
0.74 km² overlap
Sakseåsen
IUCN IaNature Reserve
0.53 km² overlap
3 more protected areassorted by overlap area
Brattåsen
IUCN IaNature Reserve
0.23 km² overlap
Burumtjern
IUCN IaNature Reserve
0.00 km² overlap
Finnstadskogen
IUCN IIINatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 625 distinct species · 142 975 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Rakkestadelva : 22 espèces reliées par 101 interactions GloBI sur 5 types (connectance 17.0%, filtre Serrano α=0.2). 13 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°
5,7°C
Annual rain
810mm
Moisture idx (CMI)
0,36
Runoff
500mm/an
PET
521mm
AET
445mm
Mean slope
3,1°
Water table
232cm
Forest
71%
Crops
33%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)