Ontologia

HydroBASINS lev08 watershed · #1081154380

Bassin de Sagana 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 5 administrative regions : Kieni, Kirinyaga Central, Mathira, Ndia, Nyeri Town

Pfafstetter: 11720988

Sub-basin area

512,9km²

Upstream area

513km²

Discharge

5,14m³/s

Mean elev.

2 305m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sagana River119 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

5 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

1 002 distinct species · 14 508 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

14 508 obs · 13 cellules
Obs. / cellule
≥ 10 542
1 347–10 541
416–1 346
233–415
< 233

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

Ecological tissue

Sample of 21 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 Sagana River : 17 espèces reliées par 19 interactions GloBI sur 2 types (connectance 9.0%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
21
Interactions affichées
19
Connectance
0.090
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°

14,4°C

Annual rain

1 327mm

Moisture idx (CMI)

-0,12

Runoff

316mm/an

PET

1 524mm

AET

1 023mm

Mean slope

5,7°

Water table

150cm

Forest

59%

Crops

5%

Urban

9%

Protected

61%

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