HydroBASINS lev08 watershed · #4081157620
Bassin de Badulu 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 19 administrative regions : Badalkumbura, Badulla, Bandarawela, Bibile, Ella +14
Sub-basin area
1 608,8km²
Upstream area
4 722km²
Discharge
140,26m³/s
Mean elev.
484m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Mahaweli Ganga2368 km²
- Bassin de Uma Oya745 km²
19 dept-equivalent regions (GADM L2)
- MahiyanganayaBadulla · Sri Lanka247.2 km²15.4% of basin
- 231.7 km²14.5% of basin
- RideemaliyaddaBadulla · Sri Lanka194.9 km²12.2% of basin
- 154.9 km²9.7% of basin
- 109.8 km²6.9% of basin
- KandaketiyaBadulla · Sri Lanka109.0 km²6.8% of basin
- MeegahakivulaBadulla · Sri Lanka105.5 km²6.6% of basin
- 103.6 km²6.5% of basin
11 moreFull L2 list
- Hali-Ela100.4 km² · 6.3%
- Soranathota80.2 km² · 5.0%
- Ella57.6 km² · 3.6%
- Badulla50.0 km² · 3.1%
- Bibile19.8 km² · 1.2%
- Laggala-Pallegama16.6 km² · 1.0%
- Lunugala14.8 km² · 0.9%
- Bandarawela4.0 km² · 0.3%
- Medadumbara1.7 km² · 0.1%
- Badalkumbura0.2 km² · 0.0%
- Walapane0.0 km² · 0.0%
30 intersecting protected areas
Central Highlands of Sri Lanka
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
126.53 km² overlap
Knuckles EPA
IUCN IaEnvironmental Protection Area (EPA)
122.24 km² overlap
Sanctuary
121.44 km² overlap
Knuckles
IUCN IaConservation Forest
117.46 km² overlap
Gurugodakanda
IUCN IbReserved Forest
18.58 km² overlap
Pethiyagoda
IUCN IbReserved Forest
9.94 km² overlap
Mewagala
IUCN IbReserved Forest
5.04 km² overlap
Pudalugasyaya
IUCN IbReserved Forest
4.14 km² overlap
Ratnaella
IUCN IbReserved Forest
3.66 km² overlap
21 more protected areassorted by overlap area
Namunukula
IUCN IaConservation Forest
2.44 km² overlap
Munamalpelessa
IUCN IbReserved Forest
2.27 km² overlap
Naminioya
IUCN IbReserved Forest
2.23 km² overlap
Haliela EPA
IUCN VEnvironmental Protection Area (EPA)
1.70 km² overlap
Arawa
IUCN IaConservation Forest
1.65 km² overlap
Batakanda
IUCN IaConservation Forest
1.51 km² overlap
Udattawa
IUCN IbReserved Forest
1.43 km² overlap
Kitulanahelakanda
IUCN IbReserved Forest
1.20 km² overlap
Kiulegedare
IUCN IbReserved Forest
1.09 km² overlap
Medawelagama
IUCN IbReserved Forest
1.07 km² overlap
Tekagala Natural Forest
IUCN IbReserved Forest
1.00 km² overlap
Bambaragala
IUCN IbReserved Forest
0.90 km² overlap
Agaratenna
IUCN IbReserved Forest
0.79 km² overlap
Alikanda
IUCN IbReserved Forest
0.56 km² overlap
Keenapalessa
IUCN IbReserved Forest
0.54 km² overlap
Padupola bombuwa
IUCN IaConservation Forest
0.40 km² overlap
Maussakele
IUCN IaConservation Forest
0.30 km² overlap
Keenagommana
IUCN IaConservation Forest
0.23 km² overlap
Atabagolla
IUCN IbReserved Forest
0.23 km² overlap
Kinigama
IUCN IbReserved Forest
0.17 km² overlap
Rilaella Patana
IUCN IbReserved Forest
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 821 distinct species · 8 342 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Badulu Oya : 25 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 3 types (connectance 7.1%, 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°
24,6°C
Annual rain
2 060mm
Moisture idx (CMI)
0,25
Runoff
821mm/an
PET
1 531mm
AET
1 294mm
Mean slope
10,9°
Water table
391cm
Forest
58%
Crops
35%
Urban
16%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)