HydroBASINS lev08 watershed · #4081157660
Bassin de Karambalan Oya
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 13 administrative regions : Bingiriya, Chilaw, Katupotha, Kuliyapitiya East, Kuliyapitiya West +8
Sub-basin area
777,8km²
Upstream area
777,9km²
Discharge
18,63m³/s
Mean elev.
42m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
13 dept-equivalent regions (GADM L2)
- Kuliyapitiya WestKurunegala · Sri Lanka164.2 km²21.2% of basin
- UdubaddawaKurunegala · Sri Lanka109.3 km²14.1% of basin
- Kuliyapitiya EastKurunegala · Sri Lanka97.4 km²12.6% of basin
- PanduwasnuwaraKurunegala · Sri Lanka87.4 km²11.3% of basin
- 85.7 km²11.1% of basin
- 59.4 km²7.7% of basin
- 48.5 km²6.3% of basin
- 44.5 km²5.8% of basin
5 moreFull L2 list
- Katupotha36.8 km² · 4.7%
- Pannala29.5 km² · 3.8%
- Narammala6.6 km² · 0.8%
- Weerambugedara4.5 km² · 0.6%
- Nattandiya0.6 km² · 0.1%
15 intersecting protected areas
Panirendawa
IUCN IbReserved Forest
3.67 km² overlap
Kankaniyamullla
IUCN IbReserved Forest
3.22 km² overlap
Conservation Forest
1.56 km² overlap
Nakkawatta/Barigoda
IUCN IbReserved Forest
1.51 km² overlap
Ruwangirikanda
IUCN IaConservation Forest
1.12 km² overlap
Kosdenikanda
IUCN IaConservation Forest
1.06 km² overlap
Digalla
IUCN Not ReportedForest Reserve
1.03 km² overlap
Galagedara 2
IUCN IbReserved Forest
0.95 km² overlap
Dematawa Kanda
IUCN IaConservation Forest
0.90 km² overlap
6 more protected areassorted by overlap area
Kaduruwewa
IUCN IbReserved Forest
0.76 km² overlap
Tissawakanda
IUCN IaConservation Forest
0.68 km² overlap
Medikele .1
IUCN IbReserved Forest
0.67 km² overlap
Paragaharuppe
IUCN IbReserved Forest
0.51 km² overlap
Panirendawa
IUCN IbReserved Forest
0.24 km² overlap
Kotapolakanda
IUCN IbReserved Forest
0.23 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
461 distinct species · 10 354 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Karambalan Oya : 22 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 27 interactions GloBI sur 3 types (connectance 8.3%, filtre Serrano α=0.2). 4 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°
27,5°C
Annual rain
1 736mm
Moisture idx (CMI)
0,09
Runoff
766mm/an
PET
1 567mm
AET
1 307mm
Mean slope
1,3°
Water table
58cm
Forest
2%
Crops
64%
Urban
43%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)