HydroBASINS lev08 watershed · #1081304840
Bassin de Ulanga 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 2 administrative regions : Kilombero, Ulanga
Sub-basin area
425,9km²
Upstream area
33 897,4km²
Discharge
445,67m³/s
Mean elev.
278m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sanje1603 km²
- Bassin de Kilombero River453 km²
2 dept-equivalent regions (GADM L2)
- 423.4 km²99.8% of basin
- 0.7 km²0.2% of basin
6 intersecting protected areas
Selous Game Reserve
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
424.10 km² overlap
Nyerere National Park
IUCN Not ReportedNational Park
424.10 km² overlap
Selous G.R
IUCN IVGame Reserve
148.54 km² overlap
Kilombero Valley Floodplain
IUCN Not ReportedWetland of International Importance (Ramsar Site)
118.20 km² overlap
Kilombero GCA
IUCN Not ReportedGame controlled area
0.07 km² overlap
Mahenge O.A.
IUCN Not ReportedOpen area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
35 distinct species · 42 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 6 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Ulanga River : 6 espèces reliées par 5 interactions GloBI sur 1 type (connectance 33.3%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
24,9°C
Annual rain
1 442mm
Moisture idx (CMI)
0,05
Runoff
298mm/an
PET
1 371mm
AET
912mm
Mean slope
0,9°
Water table
69cm
Forest
87%
Crops
6%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)