HydroBASINS lev08 watershed · #4080040260
Bassin de 北川
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 7 administrative regions : Bungo-ōno, Hinokage, Nobeoka, Saiki, Tsukumi +2
Sub-basin area
1 935,8km²
Upstream area
1 935,8km²
Discharge
5,31m³/s
Mean elev.
241m
Administrative coverage
7 dept-equivalent regions (GADM L2)
- 904.7 km²46.8% of basin
- 528.0 km²27.3% of basin
- 183.0 km²9.5% of basin
- 120.9 km²6.2% of basin
- 80.5 km²4.2% of basin
- 4.2 km²0.2% of basin
- 2.7 km²0.1% of basin
30 intersecting protected areas
Nippokaigan
IUCN VQuasi National Park
151.26 km² overlap
Bungo suido
IUCN VICoastline Marine Resource Development Area, designated sea area
101.71 km² overlap
Common fishery right area
93.63 km² overlap
Sobo-Katamuki
IUCN VQuasi National Park
84.95 km² overlap
Bungo Suido
IUCN VPrefectural Natural Park
78.48 km² overlap
Sobo-katamuki-okue
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
61.07 km² overlap
Sobo katamuki (miyazaki)
IUCN VPrefectural Natural Park
29.55 km² overlap
Forest Ecosystem Reserve
22.63 km² overlap
Common fishery right area
17.47 km² overlap
21 more protected areassorted by overlap area
Sobo katamuki (oita)
IUCN VPrefectural Natural Park
14.63 km² overlap
Sobokatamukisankei
IUCN IVPrefectural Wildlife Protection Area
12.53 km² overlap
Sanrigawara
IUCN IVPrefectural Wildlife Protection Area
9.24 km² overlap
Higashinobeoka
IUCN IVPrefectural Wildlife Protection Area
8.56 km² overlap
Sekizaki
IUCN IVPrefectural Wildlife Protection Area
6.56 km² overlap
Saeki chuubu chiiki
IUCN VGreening area(Oita)
6.10 km² overlap
Suwa
IUCN IVPrefectural Wildlife Protection Area
5.05 km² overlap
Kitagawa dam
IUCN IVPrefectural Wildlife Protection Area
4.12 km² overlap
Banjogawa
IUCN IVPrefectural Wildlife Protection Area
3.49 km² overlap
Shiroyama
IUCN IVPrefectural Wildlife Protection Area
2.91 km² overlap
Tsurumizaki
IUCN IVPrefectural Wildlife Protection Area
2.64 km² overlap
Setonaikai
IUCN VNational Park
2.53 km² overlap
Kurokui
IUCN IVPrefectural Wildlife Protection Area
2.24 km² overlap
Senzaki koen
IUCN IVPrefectural Wildlife Protection Area
1.74 km² overlap
Oshima
IUCN IVPrefectural Wildlife Protection Area
1.69 km² overlap
Kagamiyama
IUCN IVPrefectural Wildlife Protection Area
1.26 km² overlap
Fukashima
IUCN IVPrefectural Wildlife Protection Area
0.80 km² overlap
Kamadozaki
IUCN IVPrefectural Wildlife Protection Area
0.78 km² overlap
Sobokatamukiyama
IUCN IVPrefectural Wildlife Protection Area
0.77 km² overlap
Protected Water Surface
0.56 km² overlap
Protected Water Surface
0.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 062 distinct species · 4 836 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 北川 : 22 espèces reliées par 19 interactions GloBI sur 2 types (connectance 7.5%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
14,9°C
Annual rain
2 183mm
Moisture idx (CMI)
0,51
Runoff
1 308mm/an
PET
1 044mm
AET
1 044mm
Mean slope
14,4°
Water table
431cm
Forest
77%
Crops
8%
Urban
6%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)