HydroBASINS lev08 watershed · #4080049200
Bassin de Liyanage_Wewa
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 14 administrative regions : Ambanpola, Anamaduwa, Ehetuwewa, Galgamuwa, Giribawa +9
Sub-basin area
1 504,4km²
Upstream area
1 504,4km²
Discharge
21,42m³/s
Mean elev.
76m
Administrative coverage
14 dept-equivalent regions (GADM L2)
- KaruwalagaswewaPuttalam · Sri Lanka299.8 km²20.0% of basin
- 191.7 km²12.8% of basin
- 174.1 km²11.6% of basin
- NawagattegamaPuttalam · Sri Lanka173.1 km²11.6% of basin
- 145.9 km²9.7% of basin
- PolpithigamaKurunegala · Sri Lanka124.0 km²8.3% of basin
- KotaveheraKurunegala · Sri Lanka99.8 km²6.7% of basin
- 80.0 km²5.3% of basin
6 moreFull L2 list
- Puttalam70.4 km² · 4.7%
- Mahawa55.7 km² · 3.7%
- Giribawa42.1 km² · 2.8%
- Vanathavilluwa27.5 km² · 1.8%
- Mahakumbukkadawala10.3 km² · 0.7%
- Palagala3.5 km² · 0.2%
21 intersecting protected areas
Tabbowa
IUCN IVSanctuary
147.19 km² overlap
Wanniyagama
IUCN IbReserved Forest
107.59 km² overlap
Pallekele
IUCN IbReserved Forest
36.62 km² overlap
Kahalla - Pallekele
IUCN IVSanctuary
35.71 km² overlap
Sellankandal
IUCN IbReserved Forest
35.24 km² overlap
Pallegama
IUCN IbReserved Forest
24.96 km² overlap
Moragahawewa
IUCN IbReserved Forest
4.53 km² overlap
Kahalla
IUCN IbReserved Forest
4.02 km² overlap
Anamaduwa
IUCN IbReserved Forest
3.88 km² overlap
12 more protected areassorted by overlap area
Kalawellawa
IUCN IbReserved Forest
3.26 km² overlap
Ipologama
IUCN IbReserved Forest
3.12 km² overlap
Rambakanyagama
IUCN IbReserved Forest
3.11 km² overlap
Talagaswewa
IUCN IbReserved Forest
2.25 km² overlap
Tonigala
IUCN IbReserved Forest
1.97 km² overlap
Pulliyankulam
IUCN IbReserved Forest
0.84 km² overlap
Galkulama
IUCN IbReserved Forest
0.60 km² overlap
Degodaturawa
IUCN IbReserved Forest
0.43 km² overlap
Koonwewa
IUCN IbReserved Forest
0.34 km² overlap
Pahala Divulwewa
IUCN IbReserved Forest
0.29 km² overlap
Pahala Divullewa
IUCN IbReserved Forest
0.25 km² overlap
Kotakanda 2
IUCN IbReserved Forest
0.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
406 distinct species · 6 518 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Liyanage_Wewa : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 3 types (connectance 7.1%, filtre Serrano α=0.2). 6 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 248mm
Moisture idx (CMI)
-0,22
Runoff
516mm/an
PET
1 594mm
AET
1 028mm
Mean slope
1,1°
Water table
77cm
Forest
6%
Crops
35%
Urban
2%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)