HydroBASINS lev08 watershed · #4080045780
Bassin de 남양천
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 1 administrative regions : Ulleung
Sub-basin area
88km²
Upstream area
88km²
Discharge
1,91m³/s
Mean elev.
282m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- Ulleung73.7 km²83.6% of basin
24 intersecting protected areas
Natural Environment Conservation Areas
22.89 km² overlap
Forest Genetic Resources Reserve
15.17 km² overlap
Marine Protected Area
8.82 km² overlap
Disaster Prevention Reserve
IUCN IVDisaster Prevention Reserve
5.29 km² overlap
Catchment Reserve Protection Area
3.03 km² overlap
Sadong
IUCN VIWater Source Protection Area
2.32 km² overlap
Landscape Reserve
IUCN IVLandscape Reserve
2.04 km² overlap
Common fishery right area
1.20 km² overlap
Namyang
IUCN VIWater Source Protection Area
1.15 km² overlap
15 more protected areassorted by overlap area
Hyeonpo
IUCN VIWater Source Protection Area
0.76 km² overlap
Dodong
IUCN VIWater Source Protection Area
0.62 km² overlap
Naesujeon
IUCN VIWater Source Protection Area
0.62 km² overlap
Bukmyeon
IUCN VIWater Source Protection Area
0.30 km² overlap
Dokdo
IUCN IVSpecial Island
0.18 km² overlap
Dokdo
IUCN IaNature Reserve
0.18 km² overlap
Population of Siebold Hemlocks, Japanese White Pines, and Englerans Beeches in Taehadong, Ulleung
IUCN IVNatural Monument
0.17 km² overlap
Natural Monument
0.15 km² overlap
Gyeongbuk Ulleung Ulleungeup
IUCN IVWildlife Protection Area
0.14 km² overlap
Gyeongbuk Ulleung Bukmyeon
IUCN IVWildlife Protection Area
0.06 km² overlap
Natural Monument
0.05 km² overlap
Natural Monument
0.02 km² overlap
Natural Monument
0.01 km² overlap
Natural Monument
0.00 km² overlap
Spindle Tree of Dokdo Island
IUCN IVNatural Monument
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 684 distinct species · 21 636 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 남양천 : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 5 types (connectance 7.1%, filtre Serrano α=0.2). 5 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°
11,9°C
Annual rain
1 352mm
Moisture idx (CMI)
0,42
Runoff
672mm/an
PET
782mm
AET
756mm
Mean slope
18,6°
Water table
597cm
Forest
66%
Crops
9%
Urban
0%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)