HydroBASINS lev08 watershed · #4081158840
Bassin de Kaluganga
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 5 administrative regions : Ayagama, Elapatha, Kiriella, Kuruvita, Ratnapura
Sub-basin area
49,5km²
Upstream area
1 011,5km²
Discharge
49,04m³/s
Mean elev.
83m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Delawala Oya270 km²
- Bassin de Kaluganga41 km²
5 dept-equivalent regions (GADM L2)
- 23.2 km²47.1% of basin
- 12.2 km²24.7% of basin
- 8.6 km²17.4% of basin
- 4.6 km²9.4% of basin
- 0.7 km²1.3% of basin
2 intersecting protected areas
Dambulluwana
IUCN IbReserved Forest
4.27 km² overlap
Talagahakanda
IUCN IbReserved Forest
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
126 distinct species · 756 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Kaluganga : 22 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 22 interactions GloBI sur 3 types (connectance 8.0%, 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°
26,9°C
Annual rain
3 987mm
Moisture idx (CMI)
0,61
Runoff
1 495mm/an
PET
1 550mm
AET
1 536mm
Mean slope
7,8°
Water table
330cm
Forest
28%
Crops
49%
Urban
24%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)