Ontologia

HydroBASINS lev08 watershed · #1081218980

Bassin de Themi

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 6 administrative regions : Arusha, Arusha Urban, Hai, Meru, Siha +1

Pfafstetter: 11734905

Sub-basin area

2 196,4km²

Upstream area

4 710,2km²

Discharge

26,19m³/s

Mean elev.

1 155m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Kikuletwa281 km²

▲ Receives from 2 basins

6 dept-equivalent regions (GADM L2)

12 intersecting protected areas

  • Arusha National Park

    IUCN II

    National Park

    192.71 km² overlap

  • Simanjiro GCA

    IUCN Not Reported

    Game controlled area

    55.39 km² overlap

  • Meru

    IUCN Not Reported

    Forest Plantation

    16.47 km² overlap

  • Meru Kilinga Range

    IUCN Not Reported

    Forest Plantation

    12.84 km² overlap

  • Meru Sakila Range

    IUCN Not Reported

    Forest Plantation

    6.00 km² overlap

  • Lake Duluti

    IUCN Not Reported

    Forest Reserve

    0.82 km² overlap

  • Sakila

    IUCN Not Reported

    Forest Reserve

    0.53 km² overlap

  • Kibwezi

    IUCN Not Reported

    Forest Reserve

    0.44 km² overlap

  • Maasi

    IUCN Not Reported

    Forest Reserve

    0.24 km² overlap

3 more protected areas

  • Sambasha

    IUCN Not Reported

    Forest Reserve

    0.18 km² overlap

  • Ngarusambu

    IUCN Not Reported

    Forest Reserve

    0.14 km² overlap

  • Kiutu

    IUCN Not Reported

    Forest Reserve

    0.10 km² overlap

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

Species present

3 048 distinct species · 192 266 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

192 266 obs · 50 cellules
Obs. / cellule
≥ 47 317
9 755–47 316
1 798–9 754
1 098–1 797
< 1 098

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

Ecological tissue

Sample of 17 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 Themi : 15 espèces reliées par 19 interactions GloBI sur 2 types (connectance 12.4%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
18
Interactions affichées
19
Connectance
0.124
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°

20,6°C

Annual rain

868mm

Moisture idx (CMI)

-0,45

Runoff

195mm/an

PET

1 628mm

AET

703mm

Mean slope

2,8°

Water table

168cm

Forest

24%

Crops

10%

Urban

17%

Protected

9%

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