HydroBASINS lev08 watershed · #4081118920
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 4 administrative regions : Sai Yok, Sangkhla Buri, Si Sawat, Thong Pha Phum
Sub-basin area
1 405,5km²
Upstream area
5 030,5km²
Discharge
261,99m³/s
Mean elev.
393m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ran Ti1194 km²
- Bassin de ห้วยปิล็อก949 km²
4 dept-equivalent regions (GADM L2)
- 1105.8 km²79.0% of basin
- Sai Yok287.4 km²20.5% of basin
- 4.3 km²0.3% of basin
- 3.0 km²0.2% of basin
6 intersecting protected areas
Khuen Si Nakarin
IUCN IINational Park
349.51 km² overlap
Khlong Lamngu
IUCN IINational Park
244.30 km² overlap
Thong Pha Phum
IUCN IINational Park
94.22 km² overlap
Erawan
IUCN IINational Park
61.96 km² overlap
Sai Yok
IUCN IINational Park
43.26 km² overlap
Khao Laem
IUCN IINational Park
17.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 387 distinct species · 6 590 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 : 27 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 3 types (connectance 4.9%, filtre Serrano α=0.2). 2 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°
25,1°C
Annual rain
2 278mm
Moisture idx (CMI)
0,28
Runoff
1 404mm/an
PET
1 626mm
AET
1 081mm
Mean slope
10,2°
Water table
324cm
Forest
25%
Crops
7%
Urban
0%
Protected
58%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)