HydroBASINS lev08 watershed · #1081150410
Bassin de Tana River
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 : Igembe South, Mwingi North, Tharaka
Sub-basin area
350,7km²
Upstream area
15 638km²
Discharge
161,26m³/s
Mean elev.
690m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tana River2593 km²
- Bassin de Maara River1939 km²
3 dept-equivalent regions (GADM L2)
- 248.4 km²71.1% of basin
- 96.9 km²27.8% of basin
- Igembe South3.8 km²1.1% of basin
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
219 distinct species · 361 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Tana River : 35 espèces reliées par 33 interactions GloBI sur 3 types (connectance 4.5%, filtre Serrano α=0.2). 4 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°
23,3°C
Annual rain
686mm
Moisture idx (CMI)
-0,66
Runoff
258mm/an
PET
2 028mm
AET
577mm
Mean slope
7,5°
Water table
390cm
Forest
18%
Crops
8%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)