Ontologia

HydroBASINS lev08 watershed · #1080008470

Bassin de Tana 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 3 administrative regions : Garsen, Ijara, Lamu West

4% lakePfafstetter: 11720100

Sub-basin area

2 065,9km²

Upstream area

95 248,8km²

Discharge

242,12m³/s

Mean elev.

23m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

6 intersecting protected areas

  • Tana River Delta Ramsar Site

    IUCN VI

    Wetland of International Importance (Ramsar Site)

    792.09 km² overlap

  • Panda Nguo

    IUCN Not Reported

    Forest Reserve

    219.45 km² overlap

  • Boni Ijara

    IUCN Not Reported

    Forest Reserve

    96.08 km² overlap

  • Mangrove Swamps

    IUCN Not Reported

    Forest Reserve

    35.74 km² overlap

  • Witu

    IUCN Not Reported

    Forest Reserve

    24.55 km² overlap

  • Hewani

    IUCN Not Reported

    Forest Reserve

    20.04 km² overlap

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

Species present

1 184 distinct species · 9 200 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

9 200 obs · 38 cellules
Obs. / cellule
≥ 2 493
548–2 492
251–547
153–250
< 153

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

Ecological tissue

Sample of 32 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 Tana River : 25 espèces reliées par 37 interactions GloBI sur 3 types (connectance 7.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
37
Connectance
0.070
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°

27,0°C

Annual rain

876mm

Moisture idx (CMI)

-0,44

Runoff

107mm/an

PET

1 580mm

AET

740mm

Mean slope

0,2°

Water table

27cm

Forest

91%

Crops

2%

Urban

0%

Protected

1%

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