Rivière· 12 segments
La Somme
Crosses 2 administrative regions : Aisne, Somme
Total length
126km
Max discharge
55,9m³/s
Max Strahler
5
Segments matched
12
River geography2 admin regions · 37 communes
2 administrative regions crossed (GADM L2)
37 communes (L5)For countries with L5
- Cléry-sur-Somme4.72 km
- Grugies3.79 km
- Saint-Quentin3.57 km
- Camon2.99 km
- Blangy-Tronville2.61 km
- Fontaine-lès-Clercs2.41 km
- Chipilly2.27 km
- Bray-sur-Somme2.14 km
- Dallon1.98 km
- Amiens1.95 km
- Glisy1.55 km
- Feuillères1.50 km
- Vecquemont1.43 km
- La Neuville-lès-Bray1.36 km
- Seraucourt-le-Grand0.94 km
- Hem-Monacu0.72 km
- Daours0.54 km
- Urvillers0.52 km
- Lamotte-Brebière0.34 km
- Contescourt0.29 km
- Cerisy0.25 km
- Étinehem0.00 km
- Méricourt-sur-Somme0.00 km
- Morlancourt0.00 km
- Sailly-Laurette0.00 km
- Proyart0.00 km
- Maurepas0.00 km
- Rouvroy0.00 km
- Roupy0.00 km
- Dreuil-lès-Amiens0.00 km
- Argœuves0.00 km
- Castres0.00 km
- Longueau0.00 km
- Happencourt0.00 km
- Aubigny0.00 km
- Harly0.00 km
- Gauchy0.00 km
11 intersecting protected areas
Wetland of International Importance (Ramsar Site)
Étangs et marais du bassin de la Somme
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Moyenne vallée de la Somme
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Marais de la moyenne Somme entre Amiens et Corbie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Marais D\'Isle
IUCN IVNational Nature Reserve
Marais d'Isle
IUCN Not ReportedSpecial Protection Area (Birds Directive)
le grand marais de la queue
IUCN IVLand acquired by a regional conservatory of natural areas
Grand Marais De La Queue
IUCN IVBiotope Protection Order
Land acquired by a regional conservatory of natural areas
2 more protected areassorted by area
les montagnes de chipilly
IUCN IVLand acquired by a regional conservatory of natural areas
le larris du gros mont
IUCN IVLand acquired by a regional conservatory of natural areas
1 page = 1 named river (aggregation of 12 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
541 distinct species · 3 302 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 La Somme : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 4 types (connectance 13.0%, filtre Serrano α=0.2). 5 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
126km
Max discharge
55,9m³/s
Max Strahler
5
Segments matched
12
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.