HydroBASINS lev08 watershed · #4080488200
Bassin de 北上川
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 8 administrative regions : Hanamaki, Hiraizumi, Ichinoseki, Kanegasaki, Kitakami +3
Sub-basin area
619,2km²
Upstream area
6 510,7km²
Discharge
186,85m³/s
Mean elev.
191m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 胆沢川360 km²
- Bassin de 北上川67 km²
8 dept-equivalent regions (GADM L2)
- 578.1 km²93.3% of basin
- 33.5 km²5.4% of basin
- 2.3 km²0.4% of basin
- 2.2 km²0.4% of basin
- 1.8 km²0.3% of basin
- 1.1 km²0.2% of basin
- KanegasakiIwate · Japan0.3 km²0.0% of basin
- IchinosekiIwate · Japan0.3 km²0.0% of basin
9 intersecting protected areas
Prefectural Wildlife Protection Area
9.38 km² overlap
Shoboji
IUCN IVPrefectural Wildlife Protection Area
3.52 km² overlap
Oshushiesashi matsunagane
IUCN IVPrefectural Wildlife Protection Area
2.23 km² overlap
Environmental Green Space Conservation Area(Iwate)
1.29 km² overlap
Oshushi maesawagassan
IUCN IVPrefectural Wildlife Protection Area
1.13 km² overlap
Horai san
IUCN VPrefectural Nature Conservation Area
1.09 km² overlap
Miwake mori
IUCN IVPrefectural Wildlife Protection Area
0.83 km² overlap
Tenshochi
IUCN IVPrefectural Wildlife Protection Area
0.52 km² overlap
Oshushi mizusawadaishiyama
IUCN IVPrefectural Wildlife Protection Area
0.31 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
636 distinct species · 1 644 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 北上川 : 28 espèces reliées par 52 interactions GloBI sur 5 types (connectance 7.8%, filtre Serrano α=0.2). 9 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°
9,8°C
Annual rain
1 328mm
Moisture idx (CMI)
0,35
Runoff
916mm/an
PET
866mm
AET
842mm
Mean slope
5,9°
Water table
201cm
Forest
33%
Crops
20%
Urban
12%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)