HydroBASINS lev08 watershed · #4081062300
Bassin de แม่น้ำน่าน
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 4 administrative regions : Muang Nan, Pong, Pua, Tha Wang Pha
Sub-basin area
587,7km²
Upstream area
3 745,5km²
Discharge
56,75m³/s
Mean elev.
450m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำน่าน897 km²
- Bassin de แม่น้ำน่าน40 km²
4 dept-equivalent regions (GADM L2)
- 263.1 km²44.9% of basin
- 228.7 km²39.0% of basin
- 92.6 km²15.8% of basin
- 1.6 km²0.3% of basin
1 intersecting protected areas
Doi Phukha
IUCN IINational Park
46.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
334 distinct species · 1 018 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 แม่น้ำน่าน : 37 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 4 types (connectance 4.4%, filtre Serrano α=0.2). 5 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°
24,6°C
Annual rain
1 312mm
Moisture idx (CMI)
-0,23
Runoff
418mm/an
PET
1 698mm
AET
1 002mm
Mean slope
9,1°
Water table
335cm
Forest
10%
Crops
16%
Urban
4%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)