HydroBASINS lev08 watershed · #2080308510
Bassin de Исьма
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 : Borovskiy rayon, Mozhayskiy rayon, Naro-Fominskiy rayon, Ruzskiy rayon
Sub-basin area
414,9km²
Upstream area
414,9km²
Discharge
2,73m³/s
Mean elev.
194m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 214.4 km²51.4% of basin
- 120.9 km²29.0% of basin
- 79.9 km²19.2% of basin
- 1.6 km²0.4% of basin
1 intersecting protected areas
Sem` klyuchej
IUCN IIINatural Monument
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
734 distinct species · 12 909 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 Исьма : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 3 types (connectance 13.8%, 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°
4,6°C
Annual rain
648mm
Moisture idx (CMI)
0,01
Runoff
207mm/an
PET
644mm
AET
491mm
Mean slope
1,5°
Water table
140cm
Forest
62%
Crops
24%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)