HydroBASINS lev08 watershed · #4081120970
Bassin de แม่น้ำน้อย
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 6 administrative regions : Bang Ban, Bang Pa-In, Bang Sai, Lat Bua Luang, Phra Nakhon Si Ayutthaya +1
Sub-basin area
209,9km²
Upstream area
123 301,9km²
Discharge
538,32m³/s
Mean elev.
5m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de แม่น้ำน้อย2075 km²
- Bassin de แม่น้ำเจ้าพระยา488 km²
6 dept-equivalent regions (GADM L2)
- 144.7 km²69.2% of basin
- 39.8 km²19.0% of basin
- 13.7 km²6.5% of basin
- Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya · Thailand7.7 km²3.7% of basin
- Bang Pa-InPhra Nakhon Si Ayutthaya · Thailand2.0 km²1.0% of basin
- Lat Bua LuangPhra Nakhon Si Ayutthaya · Thailand1.4 km²0.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
199 distinct species · 1 487 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 แม่น้ำน้อย : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 34 interactions GloBI sur 3 types (connectance 6.4%, filtre Serrano α=0.2). 5 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°
28,1°C
Annual rain
1 336mm
Moisture idx (CMI)
-0,22
Runoff
388mm/an
PET
1 715mm
AET
1 035mm
Mean slope
0,0°
Water table
3cm
Forest
0%
Crops
63%
Urban
10%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)