HydroBASINS lev08 watershed · #2080003170
Bassin de Biga Çayı
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 6 administrative regions : Bayramiç, Biga, Lapseki, Merkez, Yenice +1
Sub-basin area
2 308,4km²
Upstream area
2 308,5km²
Discharge
20,88m³/s
Mean elev.
252m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 901.4 km²39.0% of basin
- 848.4 km²36.7% of basin
- 360.7 km²15.6% of basin
- 107.6 km²4.7% of basin
- 65.9 km²2.9% of basin
- 26.6 km²1.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
414 distinct species · 7 003 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Biga Çayı : 17 espèces reliées par 73 interactions GloBI sur 4 types (connectance 16.8%, 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°
13,6°C
Annual rain
711mm
Moisture idx (CMI)
-0,34
Runoff
295mm/an
PET
1 085mm
AET
580mm
Mean slope
7,4°
Water table
418cm
Forest
11%
Crops
39%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)