HydroBASINS lev08 watershed · #4080049210
Bassin · #4080049210
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 : Kalpitiya, Karuwalagaswewa, Puttalam, Vanathavilluwa
Sub-basin area
144,2km²
Upstream area
144,3km²
Discharge
1,69m³/s
Mean elev.
33m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- VanathavilluwaPuttalam · Sri Lanka130.1 km²90.6% of basin
- 1.9 km²1.3% of basin
- KaruwalagaswewaPuttalam · Sri Lanka0.8 km²0.5% of basin
- 0.3 km²0.2% of basin
1 intersecting protected areas
Tabbowa
IUCN IVSanctuary
11.66 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
158 distinct species · 622 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 · #4080049210 : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 27 interactions GloBI sur 3 types (connectance 6.7%, filtre Serrano α=0.2). 3 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°
27,9°C
Annual rain
1 110mm
Moisture idx (CMI)
-0,29
Runoff
382mm/an
PET
1 563mm
AET
928mm
Mean slope
1,0°
Water table
107cm
Forest
8%
Crops
26%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)