HydroBASINS lev08 watershed · #4081075450
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 5 administrative regions : Muang Phrae, Na Mun, Na Noi, Rong Kwang, Tha Pla
Sub-basin area
406,2km²
Upstream area
406,2km²
Discharge
2,6m³/s
Mean elev.
463m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 388.9 km²96.0% of basin
- 9.3 km²2.3% of basin
- 4.8 km²1.2% of basin
- 1.7 km²0.4% of basin
- 0.2 km²0.1% of basin
1 intersecting protected areas
Lam Nam Nan
IUCN IINational Park
6.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
27 distinct species · 30 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 9 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 : 9 espèces reliées par 6 interactions GloBI sur 3 types (connectance 16.7%, 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°
25,0°C
Annual rain
1 197mm
Moisture idx (CMI)
-0,31
Runoff
204mm/an
PET
1 734mm
AET
973mm
Mean slope
13,5°
Water table
501cm
Forest
23%
Crops
14%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)