HydroBASINS lev08 watershed · #1081171830
Bassin de Ruiru 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 31 administrative regions : Dagoretti North, Dagoretti South, Embakasi Central, Embakasi East, Embakasi North +26
Sub-basin area
1 886,5km²
Upstream area
1 886,5km²
Discharge
5,27m³/s
Mean elev.
1 846m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
31 dept-equivalent regions (GADM L2)
- 280.2 km²14.9% of basin
- 188.2 km²10.0% of basin
- GithunguriKiambu · Kenya183.6 km²9.8% of basin
- JujaKiambu · Kenya165.6 km²8.8% of basin
- 162.7 km²8.7% of basin
- Gatundu SouthKiambu · Kenya116.2 km²6.2% of basin
- 105.8 km²5.6% of basin
- 90.3 km²4.8% of basin
23 moreFull L2 list
- Kiambaa79.2 km² · 4.2%
- Westlands75.8 km² · 4.0%
- Kikuyu66.6 km² · 3.5%
- Kabete58.9 km² · 3.1%
- Embakasi East55.3 km² · 2.9%
- Roysambu48.0 km² · 2.6%
- Langata36.1 km² · 1.9%
- Dagoretti South28.7 km² · 1.5%
- Dagoretti North26.7 km² · 1.4%
- Starehe16.9 km² · 0.9%
- Kibra13.3 km² · 0.7%
- Embakasi South12.9 km² · 0.7%
- Makadara12.0 km² · 0.6%
- Embakasi West9.7 km² · 0.5%
- Kinangop9.5 km² · 0.5%
- Kamukunji8.8 km² · 0.5%
- Embakasi Central8.2 km² · 0.4%
- Ruaraka7.2 km² · 0.4%
- Embakasi North5.4 km² · 0.3%
- Mathare2.9 km² · 0.2%
- Mavoko2.7 km² · 0.1%
- Kajiado West0.6 km² · 0.0%
- Matungulu0.0 km² · 0.0%
12 intersecting protected areas
Kikuyu Escarpment
IUCN Not ReportedForest Reserve
133.87 km² overlap
Karura
IUCN Not ReportedForest Reserve
10.41 km² overlap
Ngong Road
IUCN Not ReportedForest Reserve
9.26 km² overlap
Nyamweru
IUCN Not ReportedForest Reserve
8.00 km² overlap
Magumo South
IUCN Not ReportedForest Reserve
2.87 km² overlap
Muguga
IUCN Not ReportedForest Reserve
2.24 km² overlap
Dagoretti
IUCN Not ReportedForest Reserve
2.14 km² overlap
Kamiti
IUCN Not ReportedForest Reserve
1.70 km² overlap
Kiambu
IUCN Not ReportedForest Reserve
1.49 km² overlap
3 more protected areassorted by overlap area
Nairobi Arboretum
IUCN Not ReportedForest Reserve
0.29 km² overlap
Nairobi
IUCN IINational Park
0.04 km² overlap
Magumo North
IUCN Not ReportedForest Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 388 distinct species · 556 452 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 Ruiru River : 15 espèces reliées par 14 interactions GloBI sur 3 types (connectance 11.7%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
17,6°C
Annual rain
1 076mm
Moisture idx (CMI)
-0,30
Runoff
155mm/an
PET
1 555mm
AET
861mm
Mean slope
3,1°
Water table
169cm
Forest
56%
Crops
6%
Urban
43%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)