HydroBASINS lev08 watershed · #2080290790
Bassin de Дёржа
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 : Gagarinskiy rayon, Rzhevskiy rayon, Shakhovskoy rayon, Zubtsovskiy rayon
Sub-basin area
715,3km²
Upstream area
715,4km²
Discharge
5,06m³/s
Mean elev.
221m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- Zubtsovskiy rayonTver' · Russia677.0 km²94.2% of basin
- 40.7 km²5.7% of basin
- Rzhevskiy rayonTver' · Russia0.8 km²0.1% of basin
- Gagarinskiy rayonSmolensk · Russia0.2 km²0.0% of basin
10 intersecting protected areas
State Natural Zakaznik
30.60 km² overlap
Gagarinskij
IUCN IINatural Park
29.13 km² overlap
State Natural Zakaznik
8.61 km² overlap
Boloto Goreloe
IUCN IVState Natural Zakaznik
6.58 km² overlap
Knyazhegorskie urochishha
IUCN IIINatural Monument
4.59 km² overlap
Boloto u d. Petushki
IUCN IVState Natural Zakaznik
3.48 km² overlap
State Natural Zakaznik
2.91 km² overlap
State Natural Zakaznik
0.88 km² overlap
State Natural Zakaznik
0.17 km² overlap
1 more protected areassorted by overlap area
Ust`e reki Derzhi
IUCN IIINatural Monument
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
523 distinct species · 2 502 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Дёржа : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 80 interactions GloBI sur 4 types (connectance 18.4%, filtre Serrano α=0.2). 10 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°
4,1°C
Annual rain
637mm
Moisture idx (CMI)
0,01
Runoff
223mm/an
PET
633mm
AET
488mm
Mean slope
1,2°
Water table
87cm
Forest
61%
Crops
26%
Urban
0%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)