Ontologia

HydroBASINS lev08 watershed · #4080748000

Bassin de Saraswati

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 across 2 countries : Chamoli, Ngari, Uttarkashi

Pfafstetter: 45246960

Sub-basin area

1 569,8km²

Upstream area

1 570km²

Discharge

57,98m³/s

Mean elev.

4 730m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Nandakini1820 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

2 intersecting protected areas

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

Species present

741 distinct species · 6 041 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 041 obs · 25 cellules
Obs. / cellule
≥ 3 434
819–3 433
27–818
7–26
< 7

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

Ecological tissue

Sample of 22 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 Saraswati : 17 espèces reliées par 30 interactions GloBI sur 3 types (connectance 10.9%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
30
Connectance
0.109
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°

-0,8°C

Annual rain

926mm

Moisture idx (CMI)

0,33

Runoff

1 076mm/an

PET

614mm

AET

566mm

Mean slope

27,3°

Water table

780cm

Forest

10%

Crops

1%

Urban

1%

Protected

20%

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