HydroBASINS lev08 watershed · #4080843520
Bassin de Narayani
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 3 administrative regions : Gandaki, Lumbini, Narayani
Sub-basin area
373,3km²
Upstream area
32 018,7km²
Discharge
1 609,19m³/s
Mean elev.
340m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de कालीगण्डकी नदी2254 km²
- Bassin de Trisuli72 km²
3 dept-equivalent regions (GADM L2)
- 299.7 km²80.4% of basin
- 73.0 km²19.6% of basin
- 0.0 km²0.0% of basin
3 intersecting protected areas
Chitwan - Buffer Zone
IUCN VINational Park - Buffer Zone
51.07 km² overlap
Chitwan
IUCN IINational Park
44.55 km² overlap
Chitwan National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
29.74 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
619 distinct species · 17 602 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Narayani : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 3 types (connectance 7.5%, filtre Serrano α=0.2). 6 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°
23,4°C
Annual rain
2 118mm
Moisture idx (CMI)
0,27
Runoff
1 686mm/an
PET
1 536mm
AET
1 014mm
Mean slope
7,0°
Water table
271cm
Forest
42%
Crops
25%
Urban
12%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)