Rivière· 8 segments
Le Betz
Crosses 3 administrative regions : Loiret, Seine-et-Marne, Yonne
Total length
41km
Max discharge
19,9m³/s
Max Strahler
4
Segments matched
8
River geography3 admin regions · 15 communes
3 administrative regions crossed (GADM L2)
- LoiretCentre-Val de Loire · France25.7 kmin this dpt
- YonneBourgogne-Franche-Comté · France7.5 kmin this dpt
- Seine-et-MarneÎle-de-France · France6.9 kmin this dpt
15 communes (L5)For countries with L5
- Le Bignon-Mirabeau6.54 km
- Dordives5.65 km
- Bazoches-sur-le-Betz5.37 km
- Bransles5.23 km
- Chevannes5.13 km
- Jouy3.91 km
- Domats3.54 km
- Chevry-sous-le-Bignon3.02 km
- Égreville1.09 km
- Château-Landon0.60 km
- Montacher-Villegardin0.08 km
- Pers-en-Gâtinais0.00 km
- Nargis0.00 km
- Souppes-sur-Loing0.00 km
- Ferrières-en-Gâtinais0.00 km
6 intersecting protected areas
Étang de Galetas
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Rivières du Loing et du Lunain
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
sabliere de cercanceaux (la)
IUCN IVLand acquired by a regional conservatory of natural areas
Sites à chiroptères de Darvault, Mocpoix et Saint-Nicolas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
vallee des ardouzes (la)
IUCN IVLand acquired by a regional conservatory of natural areas
Sites à chauves-souris de l'est du Loiret
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 8 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
866 distinct species · 8 897 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Le Betz : 15 espèces reliées par 71 interactions GloBI sur 6 types (connectance 23.7%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
41km
Max discharge
19,9m³/s
Max Strahler
4
Segments matched
8
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.