HydroBASINS lev08 watershed · #4080049450
Bassin de Neththali Aaru
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 7 administrative regions : Kandawali, Maritimepattu, Oddusuddan, Padavi Sri Pura, Puthukudiyiruppu +2
Sub-basin area
1 655,2km²
Upstream area
1 655,2km²
Discharge
1,55m³/s
Mean elev.
36m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- 596.8 km²36.2% of basin
- 381.2 km²23.1% of basin
- 367.0 km²22.3% of basin
- Vavuniya NorthVavuniya · Sri Lanka166.9 km²10.1% of basin
- 89.9 km²5.5% of basin
- 0.1 km²0.0% of basin
- Vadamaradchy EastJaffna · Sri Lanka0.0 km²0.0% of basin
20 intersecting protected areas
Teravil Oddusuddan
IUCN IbReserved Forest
354.74 km² overlap
Andankulam
IUCN IbReserved Forest
143.74 km² overlap
Chundikulam NP
IUCN IVNational Park
84.37 km² overlap
Nagancholai
IUCN IbReserved Forest
68.27 km² overlap
Kulamurippu
IUCN IbReserved Forest
48.71 km² overlap
Nayaru NR
IUCN IbNature Reserve
44.57 km² overlap
Nandikadal NR
IUCN IbNature Reserve
41.42 km² overlap
Chamalankulam
IUCN IbReserved Forest
33.73 km² overlap
Periyamadu
IUCN IbReserved Forest
31.95 km² overlap
11 more protected areassorted by overlap area
Nainamadu
IUCN IbReserved Forest
23.85 km² overlap
Mankulam
IUCN IbReserved Forest
22.37 km² overlap
Pdukkudiyrippu
IUCN IbReserved Forest
22.06 km² overlap
Vadakkachchi
IUCN IbReserved Forest
18.57 km² overlap
Thannimurippu
IUCN IbReserved Forest
13.81 km² overlap
Periyakattikulam
IUCN IbReserved Forest
11.73 km² overlap
Tanduvan
IUCN IbReserved Forest
11.47 km² overlap
Weppankulam
IUCN IbReserved Forest
10.46 km² overlap
Kokkilai
IUCN IVSanctuary
7.91 km² overlap
Mulliyavalai2
IUCN IbReserved Forest
6.62 km² overlap
Mulliyavalai
IUCN IbReserved Forest
6.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
388 distinct species · 2 354 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Neththali Aaru : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 40 interactions GloBI sur 3 types (connectance 9.2%, filtre Serrano α=0.2). 5 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°
27,6°C
Annual rain
1 453mm
Moisture idx (CMI)
0,01
Runoff
438mm/an
PET
1 442mm
AET
907mm
Mean slope
0,8°
Water table
72cm
Forest
56%
Crops
7%
Urban
0%
Protected
47%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)