HydroBASINS lev08 watershed · #4081083190
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 10 administrative regions : Den Chai, Laplae, Muang Uttaradit, Nam Pat, Phichai +5
Sub-basin area
2 114,3km²
Upstream area
17 825,5km²
Discharge
194,04m³/s
Mean elev.
155m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำปาด2500 km²
- Bassin de แม่น้ำน่าน226 km²
10 dept-equivalent regions (GADM L2)
- 779.1 km²37.0% of basin
- 472.3 km²22.4% of basin
- 456.8 km²21.7% of basin
- 178.7 km²8.5% of basin
- 154.5 km²7.3% of basin
- 29.7 km²1.4% of basin
- 15.5 km²0.7% of basin
- 11.8 km²0.6% of basin
2 moreFull L2 list
- Den Chai8.2 km² · 0.4%
- Nam Pat0.8 km² · 0.0%
3 intersecting protected areas
Lam Nam Nan
IUCN IINational Park
23.84 km² overlap
Khlong Tron
IUCN IINational Park
11.76 km² overlap
Lam Nam Nan Phang Kha
IUCN IaWildlife Sanctuary
11.47 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
531 distinct species · 7 221 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 43 interactions GloBI sur 3 types (connectance 13.2%, filtre Serrano α=0.2). 11 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°
26,9°C
Annual rain
1 312mm
Moisture idx (CMI)
-0,28
Runoff
193mm/an
PET
1 812mm
AET
1 029mm
Mean slope
4,6°
Water table
236cm
Forest
29%
Crops
32%
Urban
5%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)