HydroBASINS lev08 watershed · #1080044180
Bassin de Nasampolai
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 : Kajiado Central, Kajiado North, Kajiado West, Kikuyu, Kinangop +6
Sub-basin area
3 657,4km²
Upstream area
3 657,4km²
Discharge
7,78m³/s
Mean elev.
1 578m
Administrative coverage
11 dept-equivalent regions (GADM L2)
- 2057.3 km²56.5% of basin
- 755.4 km²20.7% of basin
- 376.4 km²10.3% of basin
- 137.1 km²3.8% of basin
- 118.7 km²3.3% of basin
- 91.9 km²2.5% of basin
- 46.3 km²1.3% of basin
- KikuyuKiambu · Kenya21.1 km²0.6% of basin
3 moreFull L2 list
- Narok South18.9 km² · 0.5%
- Kinangop15.0 km² · 0.4%
- Kajiado North3.1 km² · 0.1%
8 intersecting protected areas
Kikuyu Escarpment
IUCN Not ReportedForest Reserve
59.75 km² overlap
Hell's Gate
IUCN IINational Park
44.97 km² overlap
Mt. Longonot
IUCN IINational Park
43.13 km² overlap
Ngong Hills
IUCN Not ReportedForest Reserve
15.81 km² overlap
Kijabe Hill
IUCN Not ReportedForest Reserve
7.36 km² overlap
Magumo South
IUCN Not ReportedForest Reserve
0.75 km² overlap
Escarpment
IUCN Not ReportedForest Reserve
0.68 km² overlap
Embakasi
IUCN Not ReportedForest Reserve
0.43 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 081 distinct species · 55 009 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 15 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 Nasampolai : 13 espèces reliées par 14 interactions GloBI sur 2 types (connectance 11.7%, filtre Serrano α=0.2). 3 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°
19,5°C
Annual rain
714mm
Moisture idx (CMI)
-0,56
Runoff
100mm/an
PET
1 676mm
AET
600mm
Mean slope
5,1°
Water table
425cm
Forest
4%
Crops
12%
Urban
2%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)