HydroBASINS lev08 watershed · #4080050020
Bassin de Menik 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 9 administrative regions : Badalkumbura, Buttala, Ella, Hali-Ela, Katharagama +4
Sub-basin area
1 402,2km²
Upstream area
1 402,3km²
Discharge
20,86m³/s
Mean elev.
170m
Administrative coverage
9 dept-equivalent regions (GADM L2)
- 502.6 km²36.0% of basin
- KatharagamaMoneragala · Sri Lanka415.9 km²29.8% of basin
- BadalkumburaMoneragala · Sri Lanka156.8 km²11.2% of basin
- ThissamaharamaHambantota · Sri Lanka145.0 km²10.4% of basin
- 88.1 km²6.3% of basin
- 42.9 km²3.1% of basin
- ThanamalvilaMoneragala · Sri Lanka39.3 km²2.8% of basin
- 4.8 km²0.3% of basin
1 moreFull L2 list
- Hali-Ela0.7 km² · 0.0%
13 intersecting protected areas
Yala NP
IUCN IINational Park
577.94 km² overlap
Lunugamwehera
IUCN IINational Park
77.05 km² overlap
Yala
IUCN IaStrict Nature Reserve
25.11 km² overlap
Budugallena
IUCN IbReserved Forest
19.12 km² overlap
Katagamuwa
IUCN IVSanctuary
11.30 km² overlap
Wedasitikanda
IUCN IbReserved Forest
10.85 km² overlap
Kataragama
IUCN IVSanctuary
8.39 km² overlap
Namandiya
IUCN IbReserved Forest
6.79 km² overlap
Tunkamahela
IUCN IbReserved Forest
5.90 km² overlap
4 more protected areassorted by overlap area
Bogahapathane
IUCN IbReserved Forest
1.12 km² overlap
Kandulugalakanda
IUCN IbReserved Forest
0.65 km² overlap
Namunukula
IUCN IaConservation Forest
0.05 km² overlap
Sanctuary
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
666 distinct species · 31 208 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Menik Ganga : 30 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 3 types (connectance 5.5%, filtre Serrano α=0.2). 3 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°
26,2°C
Annual rain
1 372mm
Moisture idx (CMI)
-0,08
Runoff
647mm/an
PET
1 480mm
AET
1 060mm
Mean slope
3,0°
Water table
134cm
Forest
75%
Crops
12%
Urban
5%
Protected
51%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)