HydroBASINS lev08 watershed · #4081075400
Bassin de แม่น้ำยม
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 12 administrative regions : Den Chai, Laplae, Long, Muang Phrae, Muang Uttaradit +7
Sub-basin area
1 841km²
Upstream area
8 903,7km²
Discharge
30,88m³/s
Mean elev.
406m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำยม1218 km²
- Bassin de แม่น้ำยม455 km²
12 dept-equivalent regions (GADM L2)
- 679.5 km²37.0% of basin
- 448.1 km²24.4% of basin
- 359.6 km²19.6% of basin
- 278.7 km²15.2% of basin
- 61.2 km²3.3% of basin
- 6.5 km²0.4% of basin
- 0.5 km²0.0% of basin
- 0.4 km²0.0% of basin
4 moreFull L2 list
- Tha Pla0.3 km² · 0.0%
- Na Noi0.3 km² · 0.0%
- Muang Uttaradit0.2 km² · 0.0%
- Na Mun0.0 km² · 0.0%
3 intersecting protected areas
Lam Nam Nan
IUCN IINational Park
191.24 km² overlap
Doi Phaklong
IUCN IINational Park
145.17 km² overlap
Lam Nam Nan Phang Kha
IUCN IaWildlife Sanctuary
122.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
619 distinct species · 2 217 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 แม่น้ำยม : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 51 interactions GloBI sur 5 types (connectance 6.9%, 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°
25,4°C
Annual rain
1 152mm
Moisture idx (CMI)
-0,34
Runoff
122mm/an
PET
1 754mm
AET
955mm
Mean slope
9,0°
Water table
432cm
Forest
41%
Crops
21%
Urban
8%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)