HydroBASINS lev08 watershed · #4081077070
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 6 administrative regions : Den Chai, Muang Phrae, Muang Uttaradit, Na Mun, Sung Men +1
Sub-basin area
380,6km²
Upstream area
380,6km²
Discharge
2,23m³/s
Mean elev.
478m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 313.0 km²82.5% of basin
- 60.4 km²15.9% of basin
- 4.2 km²1.1% of basin
- 1.4 km²0.4% of basin
- 0.3 km²0.1% of basin
- 0.0 km²0.0% of basin
2 intersecting protected areas
Lam Nam Nan
IUCN IINational Park
179.20 km² overlap
Lam Nam Nan Phang Kha
IUCN IaWildlife Sanctuary
101.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
124 distinct species · 254 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 19 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 : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 16 interactions GloBI sur 3 types (connectance 9.4%, 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°
25,2°C
Annual rain
1 181mm
Moisture idx (CMI)
-0,32
Runoff
185mm/an
PET
1 748mm
AET
972mm
Mean slope
14,5°
Water table
577cm
Forest
21%
Crops
19%
Urban
0%
Protected
74%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)