HydroBASINS lev08 watershed · #2080395600
Bassin de Helme
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 8 administrative regions : Eichsfeld, Goslar, Harz, Kyffhäuserkreis, Mansfeld-Südharz +3
Sub-basin area
1 377km²
Upstream area
1 377km²
Discharge
9,52m³/s
Mean elev.
280m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- 626.0 km²45.3% of basin
- 529.9 km²38.3% of basin
- Osterode am Harz106.7 km²7.7% of basin
- 54.7 km²4.0% of basin
- 23.5 km²1.7% of basin
- 22.7 km²1.6% of basin
- Goslar15.3 km²1.1% of basin
- 3.3 km²0.2% of basin
30 intersecting protected areas
Kaarstlandschaft Südharz
IUCN Not Assignedbiosphere reserve
268.65 km² overlap
Landscape Protection Area
259.86 km² overlap
Karstlandschaft Südharz, Entwicklungszone
IUCN Not Assignedbiosphere reserve - transition area
195.12 km² overlap
Südharz
IUCN VLandscape Protection Area
112.15 km² overlap
Landscape Protection Area
73.58 km² overlap
Karstlandschaft Südharz, Pflegezone
IUCN Not Assignedbiosphere reserve - buffer zone
65.45 km² overlap
Buntsandstein- und Gipskarstlandschaft bei Questenberg im Südharz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
59.92 km² overlap
Alter Stolberg
IUCN VLandscape Protection Area
43.27 km² overlap
Nature Reserve
39.01 km² overlap
21 more protected areassorted by overlap area
Buchenwälder um Stolberg
IUCN Not ReportedSpecial Protection Area (Birds Directive)
36.65 km² overlap
Buchenwälder um Stolberg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
36.65 km² overlap
Südharzer Gipskarst
IUCN Not ReportedSpecial Protection Area (Birds Directive)
28.71 km² overlap
Südharz
IUCN Not ReportedSpecial Protection Area (Birds Directive)
24.09 km² overlap
Landscape Protection Area
22.51 km² overlap
Helmestausee
IUCN VLandscape Protection Area
17.96 km² overlap
Kyffhäuser - Badraer Schweiz - Helmestausee
IUCN Not ReportedSpecial Protection Area (Birds Directive)
17.23 km² overlap
Landscape Protection Area
16.87 km² overlap
Wetland of International Importance (Ramsar Site)
15.10 km² overlap
Nature Reserve
14.82 km² overlap
Gipskarstgebiet bei Bad Sachsa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.50 km² overlap
Kyffhäuser - Badraer Schweiz - Solwiesen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
13.25 km² overlap
Gipskarstlandschaft Pölsfeld und Breiter Fleck im Südharz
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
12.63 km² overlap
Unstrut-Triasland
IUCN VLandscape Protection Area
11.92 km² overlap
Harz (Landkreis Goslar)
IUCN VLandscape Protection Area
11.89 km² overlap
Kyffhäuser
IUCN VLandscape Protection Area
11.81 km² overlap
Südharz bei Zorge
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.64 km² overlap
Landscape Protection Area
10.96 km² overlap
Beretal mit Seitentälern
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.67 km² overlap
Hagen - Heidelberg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.41 km² overlap
Kammerforst - Himmelsberg - Mühlberg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.61 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 508 distinct species · 149 229 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Helme : 14 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 79 interactions GloBI sur 5 types (connectance 22.5%, 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°
8,0°C
Annual rain
632mm
Moisture idx (CMI)
-0,11
Runoff
199mm/an
PET
708mm
AET
505mm
Mean slope
4,4°
Water table
283cm
Forest
23%
Crops
41%
Urban
4%
Protected
46%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)