HydroBASINS lev08 watershed · #1081136700
Bassin de River Isiukhu
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 11 administrative regions : Butere, Chesumei, Emgwen, Ikolomani, Lurambi +6
Sub-basin area
1 194,3km²
Upstream area
1 194,3km²
Discharge
18,51m³/s
Mean elev.
1 525m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
11 dept-equivalent regions (GADM L2)
- 346.3 km²29.1% of basin
- 243.3 km²20.5% of basin
- 152.5 km²12.8% of basin
- 123.1 km²10.4% of basin
- 91.7 km²7.7% of basin
- 90.3 km²7.6% of basin
- 56.8 km²4.8% of basin
- 51.1 km²4.3% of basin
3 moreFull L2 list
- Mumias West27.3 km² · 2.3%
- Chesumei5.1 km² · 0.4%
- Emgwen1.5 km² · 0.1%
6 intersecting protected areas
Kakamega
IUCN Not ReportedForest Reserve
129.62 km² overlap
Kakamega
IUCN Not ReportedNational Reserve
44.08 km² overlap
North Nandi
IUCN Not ReportedForest Reserve
28.28 km² overlap
Bunyala
IUCN Not ReportedForest Reserve
8.04 km² overlap
Malaba
IUCN Not ReportedForest Reserve
0.35 km² overlap
Taressia
IUCN Not ReportedForest Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 909 distinct species · 55 146 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
20,4°C
Annual rain
1 833mm
Moisture idx (CMI)
-0,03
Runoff
488mm/an
PET
1 889mm
AET
1 504mm
Mean slope
3,2°
Water table
172cm
Forest
15%
Crops
18%
Urban
31%
Protected
15%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)