HydroBASINS lev08 watershed · #4080049310
Bassin · #4080049310
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 8 administrative regions : Madhu, Mannar Town, Manthai East, Manthai West, Musali +3
Sub-basin area
1 177,8km²
Upstream area
1 177,8km²
Discharge
3,01m³/s
Mean elev.
32m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- 349.2 km²29.8% of basin
- 304.7 km²26.0% of basin
- 172.6 km²14.7% of basin
- 138.2 km²11.8% of basin
- 80.3 km²6.9% of basin
- 47.7 km²4.1% of basin
- VengalacheddiculamVavuniya · Sri Lanka40.2 km²3.4% of basin
- 0.1 km²0.0% of basin
11 intersecting protected areas
Maduroad
IUCN IbReserved Forest
393.04 km² overlap
Mundumurippu
IUCN IbReserved Forest
82.40 km² overlap
Madhu Road
IUCN IVSanctuary
62.72 km² overlap
WedithalathiveNR
IUCN IbNature Reserve
61.13 km² overlap
Gaint's Tank
IUCN IVSanctuary
38.19 km² overlap
Vankalai
IUCN IVSanctuary
37.13 km² overlap
Iranal Illuppalikulam
IUCN IbReserved Forest
28.82 km² overlap
Adam's Bridge NP
IUCN IIMarine National Park
11.90 km² overlap
Puvarasankulam
IUCN IbReserved Forest
6.46 km² overlap
2 more protected areassorted by overlap area
Periyakuriyittikulam
IUCN IbReserved Forest
2.57 km² overlap
Kurukkalputukulam
IUCN IbReserved Forest
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
640 distinct species · 79 253 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 · #4080049310 : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 3 types (connectance 13.8%, filtre Serrano α=0.2). 6 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 240mm
Moisture idx (CMI)
-0,11
Runoff
307mm/an
PET
1 400mm
AET
859mm
Mean slope
0,4°
Water table
47cm
Forest
49%
Crops
4%
Urban
2%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)