HydroBASINS lev08 watershed · #2080379470
Bassin de Holtemme
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 2 administrative regions : Börde, Harz
Sub-basin area
274,3km²
Upstream area
274,5km²
Discharge
2,48m³/s
Mean elev.
252m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 272.5 km²99.0% of basin
- 2.8 km²1.0% of basin
17 intersecting protected areas
Landscape Protection Area
86.20 km² overlap
Huy
IUCN VLandscape Protection Area
14.84 km² overlap
Harz
IUCN IINational Park
11.61 km² overlap
Laubwaldgebiet zwischen Wernigerode und Blankenburg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.16 km² overlap
Vogelschutzgebiet zwischen Wernigerode und Blankenburg
IUCN Not ReportedSpecial Protection Area (Birds Directive)
8.16 km² overlap
Hochharz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.89 km² overlap
Vogelschutzgebiet Hochharz
IUCN Not ReportedSpecial Protection Area (Birds Directive)
7.89 km² overlap
Huy nördlich Halberstadt
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.33 km² overlap
Huy nördlich Halberstadt
IUCN Not ReportedSpecial Protection Area (Birds Directive)
7.33 km² overlap
8 more protected areassorted by overlap area
Stollensystem Büchenberg bei Elbingerode
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.60 km² overlap
Nature Reserve
1.47 km² overlap
Ziegenberg, Augstberg und Horstberg bei Benzingerode
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.27 km² overlap
Nördliches Harzvorland
IUCN VLandscape Protection Area
0.76 km² overlap
Ziegenberg bei Heimburg
IUCN IVNature Reserve
0.76 km² overlap
Nature Reserve
0.70 km² overlap
Devonkalkgebiet bei Elbingerode und Rübeland
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.14 km² overlap
Zillierbach südlich Wernigerode
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 549 distinct species · 30 636 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Holtemme : 22 espèces reliées par 103 interactions GloBI sur 7 types (connectance 18.4%, filtre Serrano α=0.2). 12 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°
8,1°C
Annual rain
644mm
Moisture idx (CMI)
-0,10
Runoff
227mm/an
PET
701mm
AET
503mm
Mean slope
3,3°
Water table
221cm
Forest
21%
Crops
58%
Urban
14%
Protected
37%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)