HydroBASINS lev08 watershed · #4080049740
Bassin de Maduru 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 : Bibile, Dehiattakandiya, Dimbulagala, Eravur Pattu, Koralai Pattu (Valachchenai) +7
Sub-basin area
1 753,6km²
Upstream area
1 753,6km²
Discharge
37,13m³/s
Mean elev.
83m
Administrative coverage
12 dept-equivalent regions (GADM L2)
- 451.3 km²25.8% of basin
- 234.4 km²13.4% of basin
- MahiyanganayaBadulla · Sri Lanka193.7 km²11.1% of basin
- 173.4 km²9.9% of basin
- 121.5 km²7.0% of basin
- DehiattakandiyaAmpara · Sri Lanka119.5 km²6.8% of basin
- 113.8 km²6.5% of basin
- 96.2 km²5.5% of basin
4 moreFull L2 list
- Rideemaliyadda81.6 km² · 4.7%
- Padiyathalawa80.3 km² · 4.6%
- Bibile38.8 km² · 2.2%
- Koralai Pattu North28.7 km² · 1.6%
10 intersecting protected areas
Maduru Oya
IUCN IINational Park
271.51 km² overlap
Thoppigala
IUCN IbReserved Forest
260.01 km² overlap
Nuwaragala
IUCN IbReserved Forest
259.01 km² overlap
Nelugala
IUCN Not ReportedJungle Corridor
45.96 km² overlap
Koralai
IUCN IbReserved Forest
29.24 km² overlap
Vakaneri
IUCN IbReserved Forest
15.04 km² overlap
Kokagala (Weli Kumbura)
IUCN IbReserved Forest
14.77 km² overlap
Varadithacholai
IUCN IbReserved Forest
9.81 km² overlap
Ulpathwewa
IUCN IbReserved Forest
1.29 km² overlap
1 more protected areassorted by overlap area
Weeralanda
IUCN IbReserved Forest
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
303 distinct species · 1 749 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 Maduru Oya : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 3 types (connectance 5.0%, 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°
27,0°C
Annual rain
1 901mm
Moisture idx (CMI)
0,21
Runoff
708mm/an
PET
1 496mm
AET
1 116mm
Mean slope
1,9°
Water table
109cm
Forest
28%
Crops
18%
Urban
3%
Protected
31%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)