HydroBASINS lev08 watershed · #4080049440
Bassin de Kanagarayan Aru
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 : Kandawali, Karachchi, Kebithigollewa, Manthai East, Oddusuddan +4
Sub-basin area
772,6km²
Upstream area
772,8km²
Discharge
6,83m³/s
Mean elev.
57m
Administrative coverage
9 dept-equivalent regions (GADM L2)
- 301.6 km²39.2% of basin
- Vavuniya NorthVavuniya · Sri Lanka218.8 km²28.4% of basin
- 105.7 km²13.7% of basin
- 69.5 km²9.0% of basin
- 68.0 km²8.8% of basin
- 3.8 km²0.5% of basin
- 1.6 km²0.2% of basin
- 0.2 km²0.0% of basin
1 moreFull L2 list
- Vavuniya South0.2 km² · 0.0%
18 intersecting protected areas
Iranamadu
IUCN IbReserved Forest
80.86 km² overlap
Panikkankulam
IUCN IbReserved Forest
68.29 km² overlap
Vadakkachchi
IUCN IbReserved Forest
50.99 km² overlap
Alaweduwan
IUCN IbReserved Forest
40.69 km² overlap
Vannivilankulam
IUCN IbReserved Forest
37.99 km² overlap
Mankulam
IUCN IbReserved Forest
37.08 km² overlap
Paranthan
IUCN IbReserved Forest
27.36 km² overlap
Teravil Oddusuddan
IUCN IbReserved Forest
25.82 km² overlap
Nainamadu
IUCN IbReserved Forest
17.60 km² overlap
9 more protected areassorted by overlap area
Karunkaikulam
IUCN IbReserved Forest
10.89 km² overlap
Periyamadu
IUCN IbReserved Forest
9.88 km² overlap
Putukulam
IUCN IbReserved Forest
9.74 km² overlap
Killinochchi
IUCN IbReserved Forest
8.26 km² overlap
Thunukkai
IUCN IbReserved Forest
5.76 km² overlap
Irampaikulam
IUCN IbReserved Forest
4.85 km² overlap
Alaweduwan exclusion
IUCN IbReserved Forest
3.52 km² overlap
Periyakattikulam
IUCN IbReserved Forest
2.45 km² overlap
Chundikulam NP
IUCN IVNational Park
0.19 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
184 distinct species · 658 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Kanagarayan Aru : 30 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 28 interactions GloBI sur 4 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°
27,5°C
Annual rain
1 403mm
Moisture idx (CMI)
-0,03
Runoff
390mm/an
PET
1 445mm
AET
900mm
Mean slope
0,6°
Water table
49cm
Forest
45%
Crops
7%
Urban
1%
Protected
46%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)