HydroBASINS lev08 watershed · #4081086650
Bassin de แม่น้ำแควน้อย
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 3 administrative regions : Chat Trakan, Na Haeo, Nakhon Thai
Sub-basin area
449,6km²
Upstream area
449,6km²
Discharge
4,3m³/s
Mean elev.
635m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Nakhon Thai434.0 km²96.8% of basin
- Chat Trakan8.9 km²2.0% of basin
- 5.3 km²1.2% of basin
1 intersecting protected areas
Namtok Chat Trakan
IUCN IINational Park
217.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
74 distinct species · 138 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 แม่น้ำแควน้อย : 17 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 21 interactions GloBI sur 3 types (connectance 10.0%, 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°
24,4°C
Annual rain
1 172mm
Moisture idx (CMI)
-0,32
Runoff
302mm/an
PET
1 715mm
AET
975mm
Mean slope
11,7°
Water table
494cm
Forest
8%
Crops
12%
Urban
0%
Protected
48%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)