HydroBASINS lev08 watershed · #4081089840
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 Phitsanulok, Phichai, Phrom Phiram, Si Nakhon, Tron
Sub-basin area
672,3km²
Upstream area
20 026,7km²
Discharge
212,13m³/s
Mean elev.
54m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำน่าน2114 km²
- Bassin de คลองตรอน1529 km²
5 dept-equivalent regions (GADM L2)
- 415.1 km²61.9% of basin
- Phrom Phiram208.4 km²31.1% of basin
- 23.9 km²3.6% of basin
- 21.6 km²3.2% of basin
- 1.2 km²0.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
147 distinct species · 1 116 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 53 interactions GloBI sur 3 types (connectance 6.5%, filtre Serrano α=0.2). 9 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°
27,5°C
Annual rain
1 338mm
Moisture idx (CMI)
-0,25
Runoff
235mm/an
PET
1 781mm
AET
1 039mm
Mean slope
0,2°
Water table
18cm
Forest
9%
Crops
47%
Urban
9%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)