HydroBASINS lev08 watershed · #4080049100
Bassin de Hamilton Canal
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 2 administrative regions : Dankotuwa, Wennappuwa
Sub-basin area
29,9km²
Upstream area
30km²
Discharge
0,84m³/s
Mean elev.
21m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 24.4 km²81.9% of basin
- WennappuwaPuttalam · Sri Lanka4.8 km²16.2% of basin
1 intersecting protected areas
Kalumukalana
IUCN IaConservation Forest
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
110 distinct species · 529 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 Hamilton Canal : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 22 interactions GloBI sur 3 types (connectance 5.4%, 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°
27,4°C
Annual rain
1 874mm
Moisture idx (CMI)
0,19
Runoff
888mm/an
PET
1 511mm
AET
1 313mm
Mean slope
1,3°
Water table
53cm
Forest
8%
Crops
59%
Urban
78%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)