HydroBASINS lev08 watershed · #4081158290
Bassin de Uma 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 12 administrative regions : Bandarawela, Ella, Hali-Ela, Hanguranketha, Haputale +7
Sub-basin area
745km²
Upstream area
745km²
Discharge
24,21m³/s
Mean elev.
1 220m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
12 dept-equivalent regions (GADM L2)
- 181.8 km²24.5% of basin
- 152.8 km²20.6% of basin
- Uva ParanagamaBadulla · Sri Lanka138.0 km²18.6% of basin
- Nuwara EliyaNuwara Eliya · Sri Lanka73.2 km²9.9% of basin
- 68.6 km²9.3% of basin
- 45.6 km²6.2% of basin
- KandaketiyaBadulla · Sri Lanka41.8 km²5.6% of basin
- BandarawelaBadulla · Sri Lanka36.6 km²4.9% of basin
4 moreFull L2 list
- Soranathota2.8 km² · 0.4%
- Hanguranketha0.4 km² · 0.1%
- Ella0.1 km² · 0.0%
- Hildummulla0.0 km² · 0.0%
17 intersecting protected areas
Sanctuary
52.02 km² overlap
Kandapola
IUCN IaConservation Forest
26.91 km² overlap
Ohiya
IUCN IaConservation Forest
12.46 km² overlap
Hakgala
IUCN Not ReportedForest Reserve
10.59 km² overlap
Hakgala
IUCN IaStrict Nature Reserve
9.73 km² overlap
Thotupalakanda
IUCN IbReserved Forest
7.86 km² overlap
Pedro Forest/Pidurutalagala
IUCN IaConservation Forest
6.48 km² overlap
Horton Plains
IUCN IINational Park
1.54 km² overlap
Tangamale
IUCN IVSanctuary
1.26 km² overlap
8 more protected areassorted by overlap area
Central Highlands of Sri Lanka
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
1.17 km² overlap
Medipokuna
IUCN IbReserved Forest
0.77 km² overlap
Mahakudugala
IUCN IaConservation Forest
0.63 km² overlap
Rilaella Patana
IUCN IbReserved Forest
0.55 km² overlap
Haliela EPA
IUCN VEnvironmental Protection Area (EPA)
0.44 km² overlap
Kirioruwa
IUCN IbReserved Forest
0.20 km² overlap
Kiulegedare
IUCN IbReserved Forest
0.05 km² overlap
Dambakele
IUCN Not ReportedForest Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 222 distinct species · 50 514 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 Uma Oya : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 19 interactions GloBI sur 2 types (connectance 8.2%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
20,3°C
Annual rain
2 039mm
Moisture idx (CMI)
0,31
Runoff
979mm/an
PET
1 402mm
AET
1 295mm
Mean slope
13,1°
Water table
465cm
Forest
87%
Crops
50%
Urban
44%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)