Ontologia

HydroBASINS lev08 watershed · #1080008880

Bassin de Umba

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 across 2 countries : Lungalunga, Mkinga

Pfafstetter: 11733801

Sub-basin area

555,6km²

Upstream area

6 704,1km²

Discharge

18,02m³/s

Mean elev.

127m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Gonja

    IUCN Not Reported

    Forest Reserve

    8.58 km² overlap

  • Mangrove Swamps

    IUCN Not Reported

    Forest Reserve

    1.88 km² overlap

  • Mangrove

    IUCN Not Reported

    Forest Reserve

    0.02 km² overlap

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

Species present

432 distinct species · 1 806 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 806 obs · 11 cellules
Obs. / cellule
≥ 1 098
225–1 097
87–224
47–86
< 47

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

Ecological tissue

Sample of 31 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 Umba : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 30 interactions GloBI sur 3 types (connectance 6.5%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
30
Connectance
0.065
Patrimoniales
1
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°

25,6°C

Annual rain

986mm

Moisture idx (CMI)

-0,40

Runoff

202mm/an

PET

1 639mm

AET

834mm

Mean slope

1,4°

Water table

174cm

Forest

80%

Crops

7%

Urban

2%

Protected

0%

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