Ontologia

HydroBASINS lev08 watershed · #4081154180

Bassin de Nichabanadhi

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 3 administrative regions : Idukki, Tirunelveli, Virudunagar

6% lakePfafstetter: 45390609

Sub-basin area

804km²

Upstream area

804km²

Discharge

3,8m³/s

Mean elev.

283m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Vaippar154 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Western Ghats

    IUCN Not Applicable

    World Heritage Site (natural or mixed)

    177.75 km² overlap

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

Species present

256 distinct species · 3 444 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

3 444 obs · 17 cellules
Obs. / cellule
≥ 1 842
413–1 841
113–412
79–112
< 79

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

Ecological tissue

Sample of 37 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 Nichabanadhi : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 4 types (connectance 6.1%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
43
Connectance
0.061
Patrimoniales
2
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°

27,1°C

Annual rain

1 165mm

Moisture idx (CMI)

-0,26

Runoff

282mm/an

PET

1 574mm

AET

936mm

Mean slope

4,9°

Water table

170cm

Forest

41%

Crops

57%

Urban

16%

Protected

15%

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