HydroBASINS lev08 watershed · #2080635540
Bassin de Sakarya Nehri
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 3 administrative regions : Geyve, Merkez, Osmaneli
Sub-basin area
112,9km²
Upstream area
55 065,3km²
Discharge
181,12m³/s
Mean elev.
318m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Göynük Çayı1045 km²
- Bassin de Sakarya Nehri15 km²
3 dept-equivalent regions (GADM L2)
- 87.5 km²77.5% of basin
- 23.3 km²20.7% of basin
- 2.1 km²1.9% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
96 distinct species · 135 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 Sakarya Nehri : 28 espèces reliées par 74 interactions GloBI sur 4 types (connectance 11.7%, filtre Serrano α=0.2). 8 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°
13,2°C
Annual rain
562mm
Moisture idx (CMI)
-0,47
Runoff
248mm/an
PET
1 052mm
AET
476mm
Mean slope
9,3°
Water table
493cm
Forest
36%
Crops
20%
Urban
6%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)