Ontologia

HydroBASINS lev08 watershed · #1081129420

Bassin de Ewaso Nyiro

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 4 administrative regions : Isiolo North, Laikipia North, Samburu East, Samburu West

Pfafstetter: 11429050

Sub-basin area

2 745,8km²

Upstream area

10 193,8km²

Discharge

32,82m³/s

Mean elev.

1 388m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Ewaso Nyiro159 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

4 intersecting protected areas

  • Loisaba Wilderness

    IUCN Not Reported

    Private Ranch

    151.78 km² overlap

  • Laikipia

    IUCN VI

    National Reserve

    144.11 km² overlap

  • Mathews Range

    IUCN Not Reported

    Forest Reserve

    48.92 km² overlap

  • Mpala

    IUCN Not Reported

    Community Conservancy

    0.16 km² overlap

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

Species present

825 distinct species · 8 880 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 880 obs · 73 cellules
Obs. / cellule
≥ 3 874
128–3 873
58–127
35–57
< 35

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

Ecological tissue

Sample of 22 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 Ewaso Nyiro : 19 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 24 interactions GloBI sur 3 types (connectance 10.4%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
22
Interactions affichées
24
Connectance
0.104
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°

20,1°C

Annual rain

709mm

Moisture idx (CMI)

-0,63

Runoff

37mm/an

PET

1 935mm

AET

598mm

Mean slope

3,1°

Water table

359cm

Forest

0%

Crops

8%

Urban

0%

Protected

12%

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