Ontologia

HydroBASINS lev08 watershed · #4080049270

Bassin · #4080049270

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 4 administrative regions : Madhu, Maha Vilachchiya, Musali, Nanaddan

Coastal basinPfafstetter: 45800159

Sub-basin area

436km²

Upstream area

436km²

Discharge

0,81m³/s

Mean elev.

48m

Administrative coverage

4 dept-equivalent regions (GADM L2)

6 intersecting protected areas

  • Wilpattu

    IUCN II

    National Park

    134.03 km² overlap

  • Veppal

    IUCN Ib

    Reserved Forest

    86.02 km² overlap

  • Mavillu

    IUCN Ib

    Reserved Forest

    78.16 km² overlap

  • Karadikkuli

    IUCN Ib

    Reserved Forest

    50.51 km² overlap

  • Periyamarippu

    IUCN Ib

    Reserved Forest

    3.98 km² overlap

  • Vilaththkulam

    IUCN Ib

    Reserved Forest

    2.42 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

168 distinct species · 707 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

707 obs · 7 cellules
Obs. / cellule
≥ 337
337–336
93–336
29–92
< 29

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin · #4080049270 : 28 espèces dont 7 patrimoniales (LR IUCN CR/EN/VU) reliées par 31 interactions GloBI sur 3 types (connectance 5.9%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
31
Connectance
0.059
Patrimoniales
7
Plus dense que (national)0 %(top 100%)

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 153mm

Moisture idx (CMI)

-0,22

Runoff

310mm/an

PET

1 482mm

AET

877mm

Mean slope

0,7°

Water table

77cm

Forest

73%

Crops

5%

Urban

0%

Protected

66%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)