HydroBASINS lev08 watershed · #4081082960
Bassin de Houay In
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 5 administrative regions across 2 countries : Bualapha, Bố Trạch, Minh Hóa, Nakai, Nhommalath
Sub-basin area
710,9km²
Upstream area
711,2km²
Discharge
24,34m³/s
Mean elev.
462m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 580.3 km²81.9% of basin
- 112.0 km²15.8% of basin
- 8.6 km²1.2% of basin
- 5.3 km²0.7% of basin
- 2.3 km²0.3% of basin
4 intersecting protected areas
Phong Nha-Ke Bang National Park and Hin Nam No National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
358.79 km² overlap
Hin Nam No
IUCN IINational Park
338.48 km² overlap
Nakai-Nam Teun
IUCN IINational Park
137.46 km² overlap
Phong Nha-Ke Bang
IUCN IINational Park
11.81 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
220 distinct species · 404 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Houay In : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 24 interactions GloBI sur 3 types (connectance 5.5%, filtre Serrano α=0.2). 4 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°
23,4°C
Annual rain
2 384mm
Moisture idx (CMI)
0,40
Runoff
1 103mm/an
PET
1 419mm
AET
1 172mm
Mean slope
13,6°
Water table
480cm
Forest
46%
Crops
7%
Urban
0%
Protected
61%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)