Ontologia

HydroBASINS lev08 watershed · #4080844410

Bassin de Umaram Chu

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 2 administrative regions : North Sikkim, West Sikkim

Pfafstetter: 45253044

Sub-basin area

673,5km²

Upstream area

673,5km²

Discharge

19,9m³/s

Mean elev.

3 617m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Teesta1756 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

1 845 distinct species · 4 399 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 399 obs · 17 cellules
Obs. / cellule
≥ 2 819
1 244–2 818
24–1 243
19–23
< 19

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

Ecological tissue

Sample of 17 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 Umaram Chu : 15 espèces reliées par 13 interactions GloBI sur 3 types (connectance 9.6%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
17
Interactions affichées
13
Connectance
0.096
Patrimoniales
0
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°

4,8°C

Annual rain

989mm

Moisture idx (CMI)

-0,08

Runoff

981mm/an

PET

866mm

AET

627mm

Mean slope

31,9°

Water table

610cm

Forest

55%

Crops

7%

Urban

0%

Protected

79%

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