Ontologia

HydroBASINS lev08 watershed · #4080049260

Bassin de Modaragam 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 7 administrative regions : Maha Vilachchiya, Musali, N. Palatha Central, Nachchadoowa, Nochchiyagama +2

12% lakePfafstetter: 45800158

Sub-basin area

998,8km²

Upstream area

998,9km²

Discharge

10,8m³/s

Mean elev.

74m

Administrative coverage

7 dept-equivalent regions (GADM L2)

7 intersecting protected areas

  • Wilpattu

    IUCN II

    National Park

    377.48 km² overlap

  • Nuwaragama

    IUCN Ib

    Reserved Forest

    21.55 km² overlap

  • Veppal

    IUCN Ib

    Reserved Forest

    18.95 km² overlap

  • Karadikkuli

    IUCN Ib

    Reserved Forest

    9.92 km² overlap

  • Ulukkulama

    IUCN Ib

    Reserved Forest

    5.89 km² overlap

  • Yodaela

    IUCN Ib

    Reserved Forest

    4.81 km² overlap

  • Wilpattu North

    IUCN IV

    Sanctuary

    2.04 km² overlap

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

Species present

535 distinct species · 20 247 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

20 247 obs · 26 cellules
Obs. / cellule
≥ 8 311
2 098–8 310
441–2 097
177–440
< 177

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

Ecological tissue

Sample of 36 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 de Modaragam Aru : 31 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 3 types (connectance 5.7%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
36
Connectance
0.057
Patrimoniales
4
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°

27,4°C

Annual rain

1 211mm

Moisture idx (CMI)

-0,22

Runoff

374mm/an

PET

1 557mm

AET

956mm

Mean slope

0,7°

Water table

63cm

Forest

51%

Crops

13%

Urban

1%

Protected

42%

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