Ontologia

HydroBASINS lev08 watershed · #1080044500

Bassin de Malewa

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 12 administrative regions : Gilgil, Kieni, Kinangop, Kipipiri, Naivasha +7

Endorheic 41% lakePfafstetter: 11530011

Sub-basin area

3 253,3km²

Upstream area

3 253,3km²

Discharge

12,22m³/s

Mean elev.

2 359m

Administrative coverage

12 dept-equivalent regions (GADM L2)

4 more

9 intersecting protected areas

  • Lake Naivasha

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    305.67 km² overlap

  • Aberdares

    IUCN Not Reported

    Forest Reserve

    256.52 km² overlap

  • Aberdare

    IUCN II

    National Park

    111.52 km² overlap

  • Eburu

    IUCN Not Reported

    Forest Reserve

    52.40 km² overlap

  • Kipipiri

    IUCN Not Reported

    Forest Reserve

    50.55 km² overlap

  • Hell's Gate

    IUCN II

    National Park

    23.20 km² overlap

  • Mt. Longonot

    IUCN II

    National Park

    9.05 km² overlap

  • Naivasha Wildlife Sanctuary

    IUCN Not Reported

    National Sanctuary

    6.28 km² overlap

  • Kirima

    IUCN Not Reported

    Forest Reserve

    2.66 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

2 379 distinct species · 248 454 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

248 454 obs · 82 cellules
Obs. / cellule
≥ 46 680
6 653–46 679
796–6 652
324–795
< 324

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 24 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Malewa : 22 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 3 types (connectance 7.2%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
20
Connectance
0.072
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

14,2°C

Annual rain

961mm

Moisture idx (CMI)

-0,34

Runoff

253mm/an

PET

1 495mm

AET

789mm

Mean slope

5,3°

Water table

278cm

Forest

32%

Crops

11%

Urban

5%

Protected

14%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)