Ontologia

HydroBASINS lev08 watershed · #4080962290

Bassin de চিলাই নদী

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 : Dhaka, Gazipur, Narayanganj

Pfafstetter: 45220240

Sub-basin area

637,1km²

Upstream area

637,5km²

Discharge

30,03m³/s

Mean elev.

11m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Brahmaputra River235 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Bhawal

    IUCN IV

    National Park

    53.67 km² overlap

  • Purbachal

    IUCN Not Reported

    Special Biodiversity Conservation Area

    0.58 km² overlap

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

Species present

696 distinct species · 57 521 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

57 521 obs · 17 cellules
Obs. / cellule
≥ 38 761
9 049–38 760
385–9 048
226–384
< 226

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

Ecological tissue

Sample of 31 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 চিলাই নদী : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 50 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
50
Connectance
0.107
Patrimoniales
1
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°

25,8°C

Annual rain

2 041mm

Moisture idx (CMI)

0,29

Runoff

1 486mm/an

PET

1 457mm

AET

1 089mm

Mean slope

0,3°

Water table

8cm

Forest

0%

Crops

56%

Urban

58%

Protected

8%

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