HydroBASINS lev08 watershed · #2080381290
Bassin de Alte Aa
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 across 2 countries : Borken, Kleve, Oude IJsselstreek, Wesel
Sub-basin area
318,3km²
Upstream area
318,3km²
Discharge
2,9m³/s
Mean elev.
32m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Wesel212.7 km²66.6% of basin
- Borken95.5 km²29.9% of basin
- 6.7 km²2.1% of basin
- Kleve4.5 km²1.4% of basin
30 intersecting protected areas
LSG-Westlich Schermbeck
IUCN VLandscape Protection Area
22.50 km² overlap
Landscape Protection Area
20.68 km² overlap
NSG Isselniederung
IUCN IVNature Reserve
18.57 km² overlap
Landscape Protection Area
18.51 km² overlap
LSG-Isselniederung
IUCN VLandscape Protection Area
15.79 km² overlap
LSG-Bruenen Ost
IUCN VLandscape Protection Area
15.54 km² overlap
Landscape Protection Area
7.53 km² overlap
NSG Daemmerwald
IUCN IVNature Reserve
7.43 km² overlap
Landscape Protection Area
6.41 km² overlap
21 more protected areassorted by overlap area
LSG-Werther Bruch
IUCN VLandscape Protection Area
6.28 km² overlap
LSG Issel
IUCN VLandscape Protection Area
5.34 km² overlap
Landscape Protection Area
4.92 km² overlap
LSG-Issel
IUCN VLandscape Protection Area
4.38 km² overlap
Landscape Protection Area
4.37 km² overlap
LSG-Leitgraben
IUCN VLandscape Protection Area
3.88 km² overlap
Landscape Protection Area
3.73 km² overlap
NSG Diersfordter Wald
IUCN IVNature Reserve
3.66 km² overlap
LSG Issel
IUCN VLandscape Protection Area
3.54 km² overlap
Landscape Protection Area
3.40 km² overlap
LSG Diesfeld - Vehlingen
IUCN VLandscape Protection Area
2.85 km² overlap
LSG Dwarsfeld
IUCN VLandscape Protection Area
2.74 km² overlap
Landscape Protection Area
2.70 km² overlap
Landscape Protection Area
2.42 km² overlap
Landscape Protection Area
2.26 km² overlap
Diersfordter Wald/ Schnepfenberg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.08 km² overlap
LSG-Issel
IUCN VLandscape Protection Area
2.00 km² overlap
LSG Isselpende
IUCN VLandscape Protection Area
1.68 km² overlap
LSG-Stammshutte
IUCN VLandscape Protection Area
1.66 km² overlap
NSG Im Venn
IUCN IVNature Reserve
1.34 km² overlap
NSG Isselburg - Werth
IUCN IVNature Reserve
1.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 309 distinct species · 49 641 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Alte Aa : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 7 bulles famille, 78 interactions GloBI documentées sur 5 types (connectance 11.7%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
9,8°C
Annual rain
784mm
Moisture idx (CMI)
0,08
Runoff
288mm/an
PET
725mm
AET
563mm
Mean slope
0,6°
Water table
54cm
Forest
15%
Crops
39%
Urban
9%
Protected
63%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)