HydroBASINS lev08 watershed · #2080003450
Bassin de Riva Deresi
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 10 administrative regions : Beykoz, Gebze, Kartal, Maltepe, Pendik +5
Sub-basin area
847,2km²
Upstream area
847,3km²
Discharge
13,77m³/s
Mean elev.
155m
Administrative coverage
10 dept-equivalent regions (GADM L2)
- 210.3 km²24.8% of basin
- 134.2 km²15.8% of basin
- 133.2 km²15.7% of basin
- 115.1 km²13.6% of basin
- 105.0 km²12.4% of basin
- 58.5 km²6.9% of basin
- 50.1 km²5.9% of basin
- 26.0 km²3.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 212 distinct species · 99 646 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Riva Deresi : 26 espèces reliées par 61 interactions GloBI sur 3 types (connectance 12.3%, filtre Serrano α=0.2). 6 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°
13,5°C
Annual rain
824mm
Moisture idx (CMI)
-0,10
Runoff
426mm/an
PET
922mm
AET
588mm
Mean slope
5,6°
Water table
284cm
Forest
48%
Crops
6%
Urban
26%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)