HydroBASINS lev08 watershed · #4080040140

Bassin de 伊呂波川

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 3 administrative regions : Kōge, Nakatsu, Usa

Coastal basinPfafstetter: 41305735

Sub-basin area

180,2km²

Upstream area

180,2km²

Discharge

6,02m³/s

Mean elev.

78m

Administrative coverage

3 dept-equivalent regions (GADM L2)

Usa
Oita · Japan
91.9 km²
51.0% of basin
Nakatsu
Oita · Japan
81.6 km²
45.3% of basin
Kōge
Fukuoka · Japan
0.1 km²
0.1% of basin

11 intersecting protected areas

Yaba-Hita-Hikosan
IUCN V
Quasi National Park
14.45 km² overlap
Buzenkai
IUCN VI
Coastline Marine Resource Development Area, designated sea area
12.05 km² overlap
Common fishery right area(Oita)
IUCN VI
Common fishery right area
5.18 km² overlap
Yamakunigawa
IUCN IV
Prefectural Wildlife Protection Area
0.74 km² overlap
Oita Prefectural Fisheries Coordination Regulations Article35(1)(iii)
IUCN IV
Protected Water Surface
0.16 km² overlap
Oita Prefectural Fisheries Coordination Regulations Article35(1)(ii)
IUCN IV
Protected Water Surface
0.11 km² overlap
Hachiya
IUCN IV
Prefectural Wildlife Protection Area
0.06 km² overlap
Fudokinooka
IUCN IV
Prefectural Wildlife Protection Area
0.01 km² overlap
Common fishery right area(Fukuoka)
IUCN VI
Common fishery right area
0.01 km² overlap

2 more protected areassorted by overlap area

Nakatsu tidal flat(Maite River Estuary Wetland)
IUCN Not Applicable
OECM
0.01 km² overlap
Onashi Wetland
IUCN Not Applicable
OECM
0.00 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

271 distinct species · 852 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 25 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de 伊呂波川 : 22 espèces reliées par 25 interactions GloBI sur 2 types (connectance 8.3%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.083

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

15,3°C

Annual rain

1 713mm

Moisture idx (CMI)

0,36

Runoff

1 117mm/an

PET

1 098mm

AET

1 092mm

Mean slope

5,1°

Water table

176cm

Forest

30%

Crops

24%

Urban

40%

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)