HydroBASINS lev08 watershed · #2080443300
Bassin de l'Oise
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 1 administrative regions : Oise
Sub-basin area
33,7km²
Upstream area
4 621,5km²
Discharge
35,41m³/s
Mean elev.
55m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Oise491 km²
- Bassin du Matz171 km²
1 dept-equivalent regions (GADM L2)
- 33.9 km²100.0% of basin
14 communes (GADM L5)Available for FRA, RWA
- Le Plessis-Brion7.25 km²100% commune
- Choisy-au-Bac6.60 km²42% commune
- Longueil-Annel5.66 km²94% commune
- Montmacq3.76 km²50% commune
- Thourotte3.24 km²78% commune
- Saint-Léger-aux-Bois1.99 km²24% commune
- Clairoix1.22 km²25% commune
- Rethondes0.75 km²8% commune
- Janville0.74 km²100% commune
- Giraumont0.71 km²20% commune
- Mélicocq0.67 km²10% commune
- Tracy-le-Mont0.65 km²3% commune
- Saint-Crépin-aux-Bois0.55 km²3% commune
- Cambronne-lès-Ribécourt0.07 km²1% commune
3 intersecting protected areas
Forêts picardes : Compiègne, Laigue, Ourscamps
IUCN Not ReportedSpecial Protection Area (Birds Directive)
16.63 km² overlap
le trou boully
IUCN IVLand acquired by a regional conservatory of natural areas
0.29 km² overlap
Moyenne vallée de l'Oise
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.10 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 600 distinct species · 22 817 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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 l'Oise : 42 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 91 interactions GloBI sur 4 types (connectance 7.7%, filtre Serrano α=0.2). 7 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°
10,4°C
Annual rain
623mm
Moisture idx (CMI)
-0,22
Runoff
265mm/an
PET
799mm
AET
525mm
Mean slope
2,0°
Water table
129cm
Forest
55%
Crops
12%
Urban
33%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)