HydroBASINS lev08 watershed · #4080922040
Bassin de সুরমা 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 2 administrative regions across 2 countries : East Khasi Hills, Sunamganj
Sub-basin area
216,8km²
Upstream area
216,8km²
Discharge
37,69m³/s
Mean elev.
270m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 159.5 km²73.7% of basin
- SunamganjSylhet · Bangladesh56.9 km²26.3% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
212 distinct species · 596 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de সুরমা নদী : 12 espèces reliées par 9 interactions GloBI sur 4 types (connectance 11.5%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
23,4°C
Annual rain
4 641mm
Moisture idx (CMI)
0,68
Runoff
5 404mm/an
PET
1 339mm
AET
1 132mm
Mean slope
9,3°
Water table
262cm
Forest
6%
Crops
12%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)