HydroBASINS lev08 watershed · #2080642260
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 5 administrative regions : Alpu, Merkez, Mihalıçcık, Nallıhan, Sarıcakaya
Sub-basin area
742,3km²
Upstream area
49 286,5km²
Discharge
158,02m³/s
Mean elev.
927m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nallı Çayı817 km²
- Bassin de Sakarya Nehri812 km²
5 dept-equivalent regions (GADM L2)
- 501.2 km²67.4% of basin
- 111.8 km²15.0% of basin
- 101.2 km²13.6% of basin
- 26.6 km²3.6% of basin
- 2.3 km²0.3% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
140 distinct species · 334 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 : 21 espèces reliées par 58 interactions GloBI sur 4 types (connectance 11.7%, filtre Serrano α=0.2). 11 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°
10,7°C
Annual rain
501mm
Moisture idx (CMI)
-0,50
Runoff
148mm/an
PET
1 007mm
AET
428mm
Mean slope
13,3°
Water table
665cm
Forest
37%
Crops
13%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)