Ontologia

HydroBASINS lev08 watershed · #1080924950

Bassin de Oyan

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 4 administrative regions : Ibarapa Central, Ibarapa North, Iseyin, Iwajowa

Pfafstetter: 14304223

Sub-basin area

749,7km²

Upstream area

4 331,7km²

Discharge

54,18m³/s

Mean elev.

158m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Oyan514 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Igangan

    IUCN Not Reported

    Forest Reserve

    59.03 km² overlap

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

Species present

115 distinct species · 401 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

401 obs · 16 cellules
Obs. / cellule
≥ 83
76–82
41–75
26–40
< 26

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 32 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de Oyan : 29 espèces reliées par 27 interactions GloBI sur 4 types (connectance 5.4%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
27
Connectance
0.054
Patrimoniales
0
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°

27,1°C

Annual rain

1 138mm

Moisture idx (CMI)

-0,35

Runoff

512mm/an

PET

1 750mm

AET

963mm

Mean slope

2,3°

Water table

158cm

Forest

14%

Crops

60%

Urban

9%

Protected

8%

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