HydroBASINS lev08 watershed · #4080015500
Bassin de Sông Long Đại
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 8 administrative regions across 2 countries : Bualapha, Bố Trạch, Hướng Hóa, Lệ Thủy, Quảng Ninh +3
Sub-basin area
2 471,2km²
Upstream area
2 471,4km²
Discharge
115,16m³/s
Mean elev.
243m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- 1274.2 km²51.7% of basin
- 1123.5 km²45.6% of basin
- 41.2 km²1.7% of basin
- 10.6 km²0.4% of basin
- 4.8 km²0.2% of basin
- 3.8 km²0.2% of basin
- 2.9 km²0.1% of basin
- 2.1 km²0.1% of basin
5 intersecting protected areas
Kounxe Nongma
IUCN VINational Protected Area
42.74 km² overlap
LavingLavern
IUCN VINational Protected Area
5.62 km² overlap
Phong Nha-Ke Bang
IUCN IINational Park
1.67 km² overlap
Phong Nha-Ke Bang National Park and Hin Nam No National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
1.53 km² overlap
Bac Huong Hoa
IUCN Not ReportedNature Reserve
1.23 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
404 distinct species · 1 157 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Sông Long Đại : 19 espèces reliées par 24 interactions GloBI sur 3 types (connectance 7.4%, filtre Serrano α=0.2). 7 bulles taxonomiques (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°
24,3°C
Annual rain
2 182mm
Moisture idx (CMI)
0,38
Runoff
1 351mm/an
PET
1 362mm
AET
1 105mm
Mean slope
11,2°
Water table
402cm
Forest
39%
Crops
44%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)