HydroBASINS lev08 watershed · #1081223550
Bassin de Thalwi
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 : Babati, Babati Urban, Karatu, Lake Manyara, Mbulu
Sub-basin area
2 512,4km²
Upstream area
2 512,4km²
Discharge
1,92m³/s
Mean elev.
1 421m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 1320.1 km²52.8% of basin
- 631.4 km²25.2% of basin
- 401.6 km²16.1% of basin
- 99.6 km²4.0% of basin
- KaratuArusha · Tanzania48.6 km²1.9% of basin
8 intersecting protected areas
Burunge WMA
IUCN Not ReportedWildlife Management Area
408.69 km² overlap
Nou
IUCN Not ReportedForest Reserve
195.66 km² overlap
Lake Manyara National Park
IUCN IINational Park
84.82 km² overlap
Hassama Hill
IUCN Not ReportedForest Reserve
48.68 km² overlap
Bereku
IUCN Not ReportedForest Reserve
19.99 km² overlap
Ufiome
IUCN Not ReportedForest Reserve
15.14 km² overlap
Haraa
IUCN Not ReportedForest Reserve
5.35 km² overlap
Tarangire National Park
IUCN IINational Park
0.21 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 082 distinct species · 10 685 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Thalwi : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 3 types (connectance 4.7%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
19,7°C
Annual rain
849mm
Moisture idx (CMI)
-0,44
Runoff
121mm/an
PET
1 546mm
AET
712mm
Mean slope
5,9°
Water table
367cm
Forest
31%
Crops
4%
Urban
2%
Protected
32%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)