HydroBASINS lev08 watershed · #1081382500
Bassin de Nachiwali
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 10 administrative regions : Lake Malawi, Nkhotakota Boma, Nkhotakota Game Reserve, Ntchisi Boma, SC Chilooko +5
Sub-basin area
799,4km²
Upstream area
799,4km²
Discharge
5m³/s
Mean elev.
749m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
10 dept-equivalent regions (GADM L2)
- 356.0 km²44.7% of basin
- 111.6 km²14.0% of basin
- Lake Malawi90.8 km²11.4% of basin
- 84.8 km²10.6% of basin
- 58.6 km²7.4% of basin
- 49.3 km²6.2% of basin
- 36.0 km²4.5% of basin
- 6.3 km²0.8% of basin
2 moreFull L2 list
- Ntchisi Boma2.4 km² · 0.3%
- TA Kasukula0.7 km² · 0.1%
1 intersecting protected areas
Nkhotakota Wildlife Reserve
IUCN IVWildlife Reserve
358.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
418 distinct species · 1 132 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 Nachiwali : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 31 interactions GloBI sur 3 types (connectance 4.7%, filtre Serrano α=0.2). 4 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°
22,3°C
Annual rain
1 217mm
Moisture idx (CMI)
-0,20
Runoff
202mm/an
PET
1 525mm
AET
856mm
Mean slope
3,2°
Water table
163cm
Forest
62%
Crops
39%
Urban
5%
Protected
47%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)