HydroBASINS lev08 watershed · #2080024450
Bassin de Koldby Ruer
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 1 administrative regions : Tønder
Sub-basin area
38,9km²
Upstream area
39km²
Discharge
0,79m³/s
Mean elev.
6m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 36.3 km²92.7% of basin
9 intersecting protected areas
Vadehavet
IUCN IaWetland of International Importance (Ramsar Site)
10.60 km² overlap
Vadehavet med Ribe Å, Tved Å og Varde Å vest for Varde
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.19 km² overlap
Vadehavet
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.18 km² overlap
Wadden Sea
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
3.95 km² overlap
Tønder Kommune private
IUCN Not Assigned§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
2.92 km² overlap
Vadehavet med Ribe Å, Tved Å og Varde Å vest for Varde
IUCN Not ReportedMarine Protected Area (OSPAR)
2.91 km² overlap
Ballum og Husum Enge og Kamper Strandenge
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.22 km² overlap
Vidåen, Tøndermarsken og Saltvandssøen
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.16 km² overlap
Tønder Kommune public
IUCN IV§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
0.94 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
581 distinct species · 57 670 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Koldby Ruer : 16 espèces reliées par 79 interactions GloBI sur 3 types (connectance 19.5%, 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°
8,4°C
Annual rain
827mm
Moisture idx (CMI)
0,35
Runoff
637mm/an
PET
537mm
AET
462mm
Mean slope
0,4°
Water table
41cm
Forest
2%
Crops
77%
Urban
0%
Protected
29%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)