HydroBASINS lev08 watershed · #4081093880
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 : Bang Krathum, Bang Rakam, Muang Phitsanulok, Wang Thong, Wat Bot
Sub-basin area
578,4km²
Upstream area
25 923,6km²
Discharge
261,99m³/s
Mean elev.
72m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำน่าน672 km²
- Bassin de แม่น้ำแควน้อย14 km²
5 dept-equivalent regions (GADM L2)
- 532.0 km²92.3% of basin
- Bang Krathum20.6 km²3.6% of basin
- 20.5 km²3.6% of basin
- 3.3 km²0.6% of basin
- 0.0 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
447 distinct species · 4 526 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 : 26 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 42 interactions GloBI sur 3 types (connectance 8.0%, filtre Serrano α=0.2). 7 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°
27,7°C
Annual rain
1 328mm
Moisture idx (CMI)
-0,24
Runoff
250mm/an
PET
1 750mm
AET
1 039mm
Mean slope
1,3°
Water table
84cm
Forest
5%
Crops
41%
Urban
19%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)