HydroBASINS lev08 watershed · #4080034010
Bassin de 화북천
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 2 administrative regions : Jeju, Seogwipo
Sub-basin area
1 936km²
Upstream area
1 936km²
Discharge
12,55m³/s
Mean elev.
270m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- JejuJeju · South Korea973.9 km²50.3% of basin
- SeogwipoJeju · South Korea880.4 km²45.5% of basin
30 intersecting protected areas
Jeju Island
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
286.53 km² overlap
Natural Environment Conservation Areas
219.28 km² overlap
Hallasan
IUCN IINational Park
153.54 km² overlap
Jeju Volcanic Island and Lava Tubes
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
93.04 km² overlap
Mount Hallasan
IUCN IaNature Reserve
91.83 km² overlap
Forest Genetic Resources Reserve
13.67 km² overlap
Mara Marine
IUCN VProvincial Park
6.90 km² overlap
Woodo Marine
IUCN VProvincial Park
5.07 km² overlap
Seogwipo Marine
IUCN VProvincial Park
4.53 km² overlap
21 more protected areassorted by overlap area
Natural Monument
3.03 km² overlap
Seongsanilchul Marine
IUCN VProvincial Park
2.97 km² overlap
Cha-gwido Island
IUCN IaNature Reserve
2.29 km² overlap
Mount Seongsan Ilchulbong
IUCN IaNature Reserve
2.03 km² overlap
Nature Reserve
1.56 km² overlap
Jejugotjawal
IUCN VProvincial Park
1.54 km² overlap
Jeju Horse of Jejudo Island
IUCN IVNatural Monument
1.31 km² overlap
Natural Monument
1.29 km² overlap
Marine Protected Area
1.21 km² overlap
Sumeunmulbaengdui Ramsar Site
IUCN Not ReportedWetland of International Importance (Ramsar Site)
1.18 km² overlap
Sueunmulbaedui
IUCN IVWetland Protected Area
1.18 km² overlap
Ojori
IUCN IVWetland Protected Area - Tidal Flat
1.17 km² overlap
Marado Island
IUCN IaNature Reserve
1.11 km² overlap
Scenic Site
1.00 km² overlap
Scenic Site
0.97 km² overlap
Natural Monument
0.68 km² overlap
Scenic Site
0.64 km² overlap
Natural Monument
0.62 km² overlap
Muljangori-oreum
IUCN IVWetland Protected Area
0.62 km² overlap
Dongbaekdongsan
IUCN IVWetland Protected Area
0.59 km² overlap
Dongbaekdongsan
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.59 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 652 distinct species · 228 591 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 화북천 : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 100 interactions GloBI sur 6 types (connectance 10.6%, filtre Serrano α=0.2). 13 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°
14,1°C
Annual rain
1 589mm
Moisture idx (CMI)
0,43
Runoff
877mm/an
PET
892mm
AET
886mm
Mean slope
3,9°
Water table
118cm
Forest
43%
Crops
34%
Urban
9%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)