HydroBASINS lev08 watershed · #4080015560
Bassin de Sông Ô Lâu
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 10 administrative regions across 2 countries : A Lưới, Gio Linh, Hương Trà, Hải Lăng, Kaleum +5
Sub-basin area
2 039,9km²
Upstream area
2 039,9km²
Discharge
1,41m³/s
Mean elev.
216m
Administrative coverage
10 dept-equivalent regions (GADM L2)
- Phong Điền938.3 km²46.2% of basin
- A Lưới393.8 km²19.4% of basin
- 262.1 km²12.9% of basin
- 221.5 km²10.9% of basin
- 131.0 km²6.4% of basin
- Triệu PhongQuảng Trị · Vietnam62.6 km²3.1% of basin
- 7.6 km²0.4% of basin
- Đa KrôngQuảng Trị · Vietnam6.2 km²0.3% of basin
2 moreFull L2 list
- Gio Linh0.3 km² · 0.0%
- Phú Vang0.1 km² · 0.0%
4 intersecting protected areas
Phong Dien
IUCN IVNature Reserve
384.33 km² overlap
Dakrong
IUCN Not ReportedNature Reserve
28.43 km² overlap
Xe Xap
IUCN VINational Protected Area
7.77 km² overlap
Sao La
IUCN Not ReportedNature Reserve
0.45 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
266 distinct species · 583 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Ô Lâu : 32 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 30 interactions GloBI sur 4 types (connectance 4.0%, 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°
24,5°C
Annual rain
2 483mm
Moisture idx (CMI)
0,43
Runoff
1 609mm/an
PET
1 409mm
AET
1 153mm
Mean slope
8,1°
Water table
309cm
Forest
37%
Crops
11%
Urban
8%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)