Rivière· 30 segments
La Lys
Crosses 4 administrative regions : Hainaut, Nord, Pas-de-Calais, West-Vlaanderen
Total length
95km
Max discharge
42,8m³/s
Max Strahler
4
Segments matched
30
River geography4 admin regions · 57 communes
4 administrative regions crossed (GADM L2)
- Pas-de-CalaisHauts-de-France · France62.8 kmin this dpt
- NordHauts-de-France · France30.0 kmin this dpt
- HainautWallonie · Belgium10.5 kmin this dpt
- West-VlaanderenVlaanderen · Belgium0.0 kmin this dpt
57 communes (L5)For countries with L5
- Merville7.11 km
- Aire-sur-la-Lys6.74 km
- Delettes5.12 km
- La Gorgue4.63 km
- Saint-Venant4.04 km
- Verchin4.00 km
- Coyecques3.91 km
- Laventie3.87 km
- Thérouanne3.47 km
- Lorgies3.22 km
- Dennebrœucq2.62 km
- Armentières2.45 km
- Thiennes2.37 km
- Frelinghien2.31 km
- Lisbourg2.30 km
- Robecq2.14 km
- Lugy2.03 km
- Rebecques1.99 km
- Estaires1.95 km
- Dohem1.90 km
- Mencas1.82 km
- Nieppe1.62 km
- Steenwerck1.57 km
- Clarques1.56 km
- Mametz1.53 km
- Matringhem1.51 km
- Fruges1.51 km
- Erquinghem-Lys1.50 km
- Haverskerque1.49 km
- Hézecques1.26 km
- Neuve-Chapelle1.24 km
- Vincly1.04 km
- Warneton0.91 km
- Mont-Bernanchon0.89 km
- Deûlémont0.86 km
- Houplines0.79 km
- Sailly-sur-la-Lys0.72 km
- Reclinghem0.71 km
- Calonne-sur-la-Lys0.69 km
- Comines0.48 km
- Audincthun0.43 km
- Saint-Floris0.27 km
- Gonnehem0.25 km
- Lestrem0.00 km
- Illies0.00 km
- Guarbecque0.00 km
- Violaines0.00 km
- Richebourg0.00 km
- Isbergues0.00 km
- Canlers0.00 km
- Wervicq-Sud0.00 km
- Senlis0.00 km
- Morbecque0.00 km
- Aubers0.00 km
- Roquetoire0.00 km
- Enguinegatte0.00 km
- Radinghem0.00 km
7 intersecting protected areas
Caps Et Marais D\'Opale
IUCN VRegional Nature Park
Vallée de la Lys
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Vallée de la Lys
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Prairie Des Willemots
IUCN IVBiotope Protection Order
Land acquired by a regional conservatory of natural areas
Prés Du Moulin Madame
IUCN IVRegional Nature Reserve
prairies du pont neuf
IUCN IVLand acquired by a regional conservatory of natural areas
1 page = 1 named river (aggregation of 30 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
930 distinct species · 11 665 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Lys : 24 espèces reliées par 102 interactions GloBI sur 6 types (connectance 17.1%, filtre Serrano α=0.2). 11 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
95km
Max discharge
42,8m³/s
Max Strahler
4
Segments matched
30
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.