HydroBASINS lev08 watershed · #4081157070
Bassin de Amban Ganga
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 18 administrative regions : Akurana, Ambanganga Korale, Dambulla, Elahera, Galewela +13
Sub-basin area
1 624,5km²
Upstream area
1 624,5km²
Discharge
37,36m³/s
Mean elev.
362m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
18 dept-equivalent regions (GADM L2)
- Laggala-PallegamaMatale · Sri Lanka360.0 km²22.3% of basin
- 332.5 km²20.6% of basin
- 254.6 km²15.7% of basin
- 179.4 km²11.1% of basin
- 100.4 km²6.2% of basin
- 76.5 km²4.7% of basin
- 75.6 km²4.7% of basin
- 63.5 km²3.9% of basin
10 moreFull L2 list
- Ambanganga Korale56.8 km² · 3.5%
- Yatawatta48.3 km² · 3.0%
- Dambulla37.9 km² · 2.3%
- Pathadumbara12.7 km² · 0.8%
- Galewela6.4 km² · 0.4%
- Akurana6.0 km² · 0.4%
- Panvila4.5 km² · 0.3%
- Hingurakgoda2.3 km² · 0.1%
- Wilgamuwa0.3 km² · 0.0%
- Udadumbara0.1 km² · 0.0%
26 intersecting protected areas
Nature Reserve
143.14 km² overlap
Knuckles
IUCN IaConservation Forest
139.50 km² overlap
Knuckles EPA
IUCN IaEnvironmental Protection Area (EPA)
136.42 km² overlap
Central Highlands of Sri Lanka
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
135.91 km² overlap
Wasgamuwa
IUCN IINational Park
120.10 km² overlap
Elahera
IUCN IbReserved Forest
87.08 km² overlap
Minneriya-Giritale Section I
IUCN IVNature Reserve
69.43 km² overlap
Polonnaruwa
IUCN IVSanctuary
9.79 km² overlap
Hobaragoda
IUCN IbReserved Forest
8.79 km² overlap
17 more protected areassorted by overlap area
Flood Plains
IUCN IINational Park
6.42 km² overlap
Gangahenwela
IUCN IbReserved Forest
4.07 km² overlap
Rambukoluwa
IUCN IbReserved Forest
4.07 km² overlap
Linipitiya Akarahaduwa
IUCN IbReserved Forest
3.63 km² overlap
Arangala penalaboda
IUCN IbReserved Forest
3.08 km² overlap
Bowatenna
IUCN IbReserved Forest
2.61 km² overlap
Karawilahena
IUCN IbReserved Forest
1.74 km² overlap
Pansalathenna Maussawa EPA
IUCN VIEnvironmental Protection Area (EPA)
1.03 km² overlap
Nawaneliya Beligoda
IUCN IbReserved Forest
0.66 km² overlap
Dambagahamadiththa
IUCN IbReserved Forest
0.53 km² overlap
Ambokka kanda
IUCN IbReserved Forest
0.46 km² overlap
Hapugasyaya Forest
IUCN IbReserved Forest
0.44 km² overlap
Andawala-Kumbaloluwa
IUCN IbReserved Forest
0.43 km² overlap
Wishire
IUCN IbReserved Forest
0.25 km² overlap
Meegolla
IUCN IbReserved Forest
0.17 km² overlap
Enasalmada
IUCN IbReserved Forest
0.09 km² overlap
Urulemulla
IUCN IbReserved Forest
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 684 distinct species · 34 568 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Amban Ganga : 23 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 17 interactions GloBI sur 3 types (connectance 6.2%, 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°
25,5°C
Annual rain
1 976mm
Moisture idx (CMI)
0,20
Runoff
733mm/an
PET
1 545mm
AET
1 273mm
Mean slope
8,7°
Water table
367cm
Forest
66%
Crops
24%
Urban
16%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)