HydroBASINS lev08 watershed · #4080015550
Bassin de Sông Thạch Hãn
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 11 administrative regions across 2 countries : A Lưới, Cam Lộ, Gio Linh, Hướng Hóa, Hải Lăng +6
Sub-basin area
2 695,4km²
Upstream area
2 695,4km²
Discharge
120,79m³/s
Mean elev.
292m
Administrative coverage
11 dept-equivalent regions (GADM L2)
- Đa KrôngQuảng Trị · Vietnam1094.0 km²40.7% of basin
- 402.5 km²15.0% of basin
- Cam LộQuảng Trị · Vietnam333.2 km²12.4% of basin
- Triệu PhongQuảng Trị · Vietnam290.1 km²10.8% of basin
- 161.5 km²6.0% of basin
- A Lưới120.9 km²4.5% of basin
- Gio LinhQuảng Trị · Vietnam120.2 km²4.5% of basin
- 74.5 km²2.8% of basin
4 intersecting protected areas
Dakrong
IUCN Not ReportedNature Reserve
356.62 km² overlap
Bac Huong Hoa
IUCN Not ReportedNature Reserve
112.61 km² overlap
Phong Dien
IUCN IVNature Reserve
14.76 km² overlap
Xe Xap
IUCN VINational Protected Area
5.36 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
737 distinct species · 2 508 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Thạch Hãn : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 4 types (connectance 4.5%, filtre Serrano α=0.2). 8 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°
24,1°C
Annual rain
2 285mm
Moisture idx (CMI)
0,38
Runoff
1 367mm/an
PET
1 401mm
AET
1 146mm
Mean slope
9,9°
Water table
370cm
Forest
31%
Crops
20%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)