HydroBASINS lev08 watershed · #4080049110
Bassin de Gin 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 7 administrative regions : Dankotuwa, Kuliyapitiya West, Mahawewa, Nattandiya, Pannala +2
Sub-basin area
290,8km²
Upstream area
291km²
Discharge
7,76m³/s
Mean elev.
31m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- 146.9 km²50.7% of basin
- NattandiyaPuttalam · Sri Lanka63.9 km²22.1% of basin
- 31.1 km²10.7% of basin
- WennappuwaPuttalam · Sri Lanka27.0 km²9.3% of basin
- 12.7 km²4.4% of basin
- UdubaddawaKurunegala · Sri Lanka7.5 km²2.6% of basin
- Kuliyapitiya WestKurunegala · Sri Lanka0.3 km²0.1% of basin
4 intersecting protected areas
Kankaniyamullla
IUCN IbReserved Forest
5.57 km² overlap
Dikkele
IUCN IbReserved Forest
1.63 km² overlap
Galagedara 2
IUCN IbReserved Forest
0.62 km² overlap
Dikkele2 (wawlkele)
IUCN IbReserved Forest
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
551 distinct species · 15 483 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Gin Oya : 29 espèces reliées par 34 interactions GloBI sur 4 types (connectance 6.1%, 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°
27,4°C
Annual rain
1 857mm
Moisture idx (CMI)
0,17
Runoff
843mm/an
PET
1 536mm
AET
1 332mm
Mean slope
1,3°
Water table
55cm
Forest
2%
Crops
63%
Urban
51%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)