HydroBASINS lev08 watershed · #2080358530
Bassin de Aller
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 17 administrative regions : Altmarkkreis Salzwedel, Braunschweig, Börde, Celle, Gifhorn +12
Sub-basin area
7 816,8km²
Upstream area
7 816,9km²
Discharge
54,97m³/s
Mean elev.
100m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
17 dept-equivalent regions (GADM L2)
- Gifhorn1523.4 km²19.4% of basin
- Celle1357.6 km²17.3% of basin
- 883.3 km²11.3% of basin
- Wolfenbüttel544.8 km²6.9% of basin
- 538.2 km²6.9% of basin
- Helmstedt524.2 km²6.7% of basin
- Peine503.3 km²6.4% of basin
- 369.3 km²4.7% of basin
9 moreFull L2 list
- Goslar342.9 km² · 4.4%
- Altmarkkreis Salzwedel261.0 km² · 3.3%
- Harz260.1 km² · 3.3%
- Wolfsburg205.0 km² · 2.6%
- Salzgitter199.8 km² · 2.5%
- Braunschweig192.3 km² · 2.4%
- Uelzen70.5 km² · 0.9%
- Hildesheim54.8 km² · 0.7%
- Lüneburg17.4 km² · 0.2%
30 intersecting protected areas
Landscape Protection Area
389.10 km² overlap
Biosphärenreservat Drömling
IUCN Not Assignedbiosphere reserve
303.40 km² overlap
Biosphärenreservat Drömling, Entwicklungszone
IUCN Not Assignedbiosphere reserve - transition area
191.56 km² overlap
Harz (Landkreis Goslar)
IUCN VLandscape Protection Area
126.13 km² overlap
Ostheide
IUCN VLandscape Protection Area
105.31 km² overlap
Harbke-Allertal
IUCN VLandscape Protection Area
99.84 km² overlap
Vogelschutzgebiet Drömling
IUCN Not ReportedSpecial Protection Area (Birds Directive)
98.79 km² overlap
Harz
IUCN IINational Park
97.57 km² overlap
Biosphärenreservat Drömling, Pflegezone
IUCN Not Assignedbiosphere reserve - buffer zone
95.65 km² overlap
21 more protected areassorted by overlap area
Aller (mit Barnbruch), untere Leine, untere Oker
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
94.23 km² overlap
Drömling
IUCN VLandscape Protection Area
91.54 km² overlap
Landscape Protection Area
83.72 km² overlap
Südheide und Aschauteiche bei Eschede
IUCN Not ReportedSpecial Protection Area (Birds Directive)
82.94 km² overlap
Flechtinger Höhenzug
IUCN VLandscape Protection Area
78.97 km² overlap
Landscape Protection Area
70.97 km² overlap
Ohre-Drömling
IUCN IVNature Reserve
69.22 km² overlap
Truppenübungsplätze Munster Nord und Süd
IUCN Not ReportedSpecial Protection Area (Birds Directive)
69.06 km² overlap
Burgdorfer Holz
IUCN VLandscape Protection Area
59.45 km² overlap
Landscape Protection Area
58.19 km² overlap
Elm
IUCN VLandscape Protection Area
53.52 km² overlap
Lutter, Lachte, Aschau (mit einigen Nebenbächen)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
51.13 km² overlap
Nationalpark Harz (Niedersachsen)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
46.30 km² overlap
Nationalpark Harz
IUCN Not ReportedSpecial Protection Area (Birds Directive)
44.75 km² overlap
Lappwald
IUCN VLandscape Protection Area
43.49 km² overlap
Drömling
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
42.23 km² overlap
Drömling
IUCN Not ReportedSpecial Protection Area (Birds Directive)
42.17 km² overlap
Feldflur bei Kusey
IUCN Not ReportedSpecial Protection Area (Birds Directive)
39.62 km² overlap
Elm
IUCN VLandscape Protection Area
36.13 km² overlap
Laubwälder zwischen Braunschweig und Wolfsburg
IUCN Not ReportedSpecial Protection Area (Birds Directive)
33.04 km² overlap
Mittlere Schunter
IUCN VLandscape Protection Area
31.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
12 226 distinct species · 1 149 287 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Aller : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 113 interactions GloBI sur 6 types (connectance 17.9%, filtre Serrano α=0.2). 11 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°
8,6°C
Annual rain
649mm
Moisture idx (CMI)
-0,11
Runoff
239mm/an
PET
725mm
AET
530mm
Mean slope
1,3°
Water table
111cm
Forest
24%
Crops
42%
Urban
12%
Protected
33%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)