Ontologia

HydroBASINS lev08 watershed · #4080751750

Bassin de Tons Nadi

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 : Dehradun, Hardwar, Saharanpur

Pfafstetter: 45249938

Sub-basin area

679km²

Upstream area

679km²

Discharge

13,58m³/s

Mean elev.

717m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Yamuna52 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

1 756 distinct species · 283 534 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

283 534 obs · 18 cellules
Obs. / cellule
≥ 100 583
50 057–100 582
3 894–50 056
1 473–3 893
< 1 473

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

Ecological tissue

Sample of 29 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 Tons Nadi : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 3 types (connectance 7.9%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
32
Connectance
0.079
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°

21,6°C

Annual rain

2 046mm

Moisture idx (CMI)

0,27

Runoff

618mm/an

PET

1 469mm

AET

984mm

Mean slope

5,9°

Water table

315cm

Forest

41%

Crops

22%

Urban

17%

Protected

1%

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