HydroBASINS lev08 watershed · #4081075460
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 : Fak Tha, Na Mun, Na Noi, Tha Pla
Sub-basin area
751,4km²
Upstream area
11 676,3km²
Discharge
137,84m³/s
Mean elev.
428m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำน่าน664 km²
- Bassin de ห้วยขาม223 km²
4 dept-equivalent regions (GADM L2)
- 314.1 km²41.9% of basin
- 281.7 km²37.6% of basin
- 153.0 km²20.4% of basin
- 0.3 km²0.0% of basin
3 intersecting protected areas
Si Nan
IUCN IINational Park
427.39 km² overlap
Lam Nam Nan
IUCN IINational Park
64.03 km² overlap
Mae Charim
IUCN IINational Park
58.49 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
25 distinct species · 38 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 : 12 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 10 interactions GloBI sur 2 types (connectance 12.8%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
25,1°C
Annual rain
1 236mm
Moisture idx (CMI)
-0,29
Runoff
297mm/an
PET
1 736mm
AET
990mm
Mean slope
12,5°
Water table
458cm
Forest
65%
Crops
3%
Urban
0%
Protected
73%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)