Ontologia

HydroBASINS lev08 watershed · #1081130870

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 2 administrative regions : Isiolo North, Samburu East

Pfafstetter: 11429019

Sub-basin area

439,8km²

Upstream area

13 165,1km²

Discharge

36,16m³/s

Mean elev.

1 014m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Lbaa Lekoitoga65 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Samburu

    IUCN II

    National Reserve

    83.75 km² overlap

  • Buffalo Springs

    IUCN II

    National Reserve

    46.24 km² overlap

  • Ol Lengishu

    IUCN Not Reported

    Community Forest Reserve

    6.80 km² overlap

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

Species present

784 distinct species · 103 051 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

103 051 obs · 13 cellules
Obs. / cellule
≥ 57 153
18 371–57 152
7 827–18 370
246–7 826
< 246

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

Ecological tissue

Sample of 8 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 : 7 espèces reliées par 7 interactions GloBI sur 2 types (connectance 25.0%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
8
Interactions affichées
7
Connectance
0.250
Patrimoniales
0
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°

23,1°C

Annual rain

608mm

Moisture idx (CMI)

-0,71

Runoff

91mm/an

PET

2 079mm

AET

513mm

Mean slope

3,9°

Water table

321cm

Forest

0%

Crops

11%

Urban

0%

Protected

30%

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