HydroBASINS lev08 watershed · #2080412180
Bassin de la Lys
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 across 2 countries : Hainaut, Nord, Pas-de-Calais, West-Vlaanderen
Sub-basin area
735,8km²
Upstream area
1 808,3km²
Discharge
29,19m³/s
Mean elev.
28m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Lys862 km²
- Bassin de la Biette210 km²
4 dept-equivalent regions (GADM L2)
- 456.2 km²61.8% of basin
- 241.1 km²32.6% of basin
- 23.2 km²3.1% of basin
- 17.9 km²2.4% of basin
98 communes (GADM L5)Available for FRA, RWA
- Bailleul42.51 km²97% commune
- Hazebrouck27.96 km²100% commune
- Steenwerck27.05 km²100% commune
- Vieux-Berquin26.44 km²100% commune
- Merville21.33 km²79% commune
- Méteren18.54 km²100% commune
- Laventie18.18 km²100% commune
- Richebourg17.60 km²100% commune
- Nieppe17.53 km²100% commune
- Beuvry17.37 km²100% commune
- Lestrem16.26 km²74% commune
- Morbecque15.89 km²36% commune
- La Gorgue14.61 km²100% commune
- Estaires13.88 km²100% commune
- Fleurbaix12.80 km²100% commune
- La Couture12.78 km²97% commune
- Hersin-Coupigny12.16 km²95% commune
- Le Doulieu11.92 km²100% commune
- Houplines11.47 km²100% commune
- Hondeghem10.97 km²89% commune
- Ennetières-en-Weppes10.67 km²95% commune
- La Chapelle-d'Armentières10.60 km²100% commune
- Aubers10.15 km²100% commune
- Caëstre10.07 km²100% commune
- Merris9.85 km²100% commune
- Sailly-sur-la-Lys9.80 km²100% commune
- Erquinghem-Lys9.54 km²100% commune
- Nœux-les-Mines9.22 km²100% commune
- Mazingarbe9.12 km²83% commune
- Flêtre8.98 km²97% commune
- Fromelles8.90 km²100% commune
- Bouvigny-Boyeffles8.70 km²97% commune
- Frelinghien7.99 km²72% commune
- Saint-Jans-Cappel7.61 km²95% commune
- Festubert7.43 km²100% commune
- Bois-Grenier7.39 km²100% commune
- Lorgies6.99 km²100% commune
- Violaines6.98 km²68% commune
- Bully-les-Mines6.97 km²94% commune
- Radinghem-en-Weppes6.92 km²100% commune
- Illies6.45 km²81% commune
- Neuf-Berquin6.34 km²100% commune
- Herlies6.32 km²86% commune
- Aix-Noulette6.15 km²58% commune
- Sains-en-Gohelle5.96 km²100% commune
- Armentières5.93 km²100% commune
- Borre5.65 km²100% commune
- Sailly-Labourse5.64 km²100% commune
- Locon5.20 km²54% commune
- Berthen4.94 km²95% commune
- Labourse4.78 km²100% commune
- Strazeele4.77 km²100% commune
- Eecke4.72 km²45% commune
- Prémesques4.67 km²97% commune
- Cuinchy4.51 km²100% commune
- Fournes-en-Weppes4.40 km²54% commune
- Vermelles4.40 km²43% commune
- Staple3.93 km²40% commune
- Verquigneul3.62 km²100% commune
- Annequin3.62 km²100% commune
- Saint-Sylvestre-Cappel3.55 km²47% commune
- Pradelles3.41 km²100% commune
- Wallon-Cappel3.38 km²64% commune
- Le Maisnil3.32 km²100% commune
- Vieille-Chapelle3.30 km²100% commune
- Givenchy-lès-la-Bassée3.04 km²88% commune
- Verquin2.76 km²74% commune
- Lynde2.59 km²29% commune
- Noyelles-lès-Vermelles2.59 km²100% commune
- Boeschepe2.55 km²19% commune
- Beaucamps-Ligny2.33 km²46% commune
- La Bassée2.30 km²65% commune
- Grenay2.00 km²64% commune
- Pérenchies1.88 km²59% commune
- Drouvin-le-Marais1.88 km²90% commune
- Essars1.81 km²50% commune
- Cambrin1.80 km²100% commune
- Neuve-Chapelle1.78 km²100% commune
- Escobecques1.39 km²85% commune
- Béthune1.30 km²14% commune
- Houchin1.11 km²26% commune
- Salomé0.65 km²12% commune
- Capinghem0.60 km²34% commune
- Englos0.55 km²41% commune
- Barlin0.46 km²7% commune
- Servins0.31 km²5% commune
- Ablain-Saint-Nazaire0.31 km²3% commune
- Fresnicourt-le-Dolmen0.31 km²4% commune
- Godewaersvelde0.27 km²2% commune
- Hallennes-lez-Haubourdin0.22 km²5% commune
- Sercus0.17 km²4% commune
- Erquinghem-le-Sec0.07 km²4% commune
- Vaudricourt0.05 km²2% commune
- Sainte-Marie-Cappel0.04 km²1% commune
- Deûlémont0.03 km²0% commune
- Ebblinghem0.01 km²0% commune
- Wicres0.01 km²0% commune
- Bavinchove0.00 km²0% commune
14 intersecting protected areas
Vallée de la Lys
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.58 km² overlap
Vallée de la Lys
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.58 km² overlap
Westvlaams Heuvelland
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.93 km² overlap
Regional Nature Reserve
0.71 km² overlap
Land acquired by a regional conservatory of natural areas
0.52 km² overlap
Ploegsteert
IUCN IVScientific Interest Site (Walloon Region)
0.50 km² overlap
Prairie Des Willemots
IUCN IVBiotope Protection Order
0.33 km² overlap
NBP-WV-20-0229 type 4
IUCN IVNature management plan type 4 (Flemish Region)
0.26 km² overlap
terril de mazingarbe
IUCN IVLand acquired by a regional conservatory of natural areas
0.12 km² overlap
5 more protected areassorted by overlap area
Land acquired by a regional conservatory of natural areas
0.09 km² overlap
Prés Du Moulin Madame
IUCN IVRegional Nature Reserve
0.09 km² overlap
NBP-WV-23-0101 type 4
IUCN IVNature management plan type 4 (Flemish Region)
0.07 km² overlap
prairies du pont neuf
IUCN IVLand acquired by a regional conservatory of natural areas
0.03 km² overlap
coq de paille
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 980 distinct species · 352 681 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 la Lys : 25 espèces + 8 bulles famille, 90 interactions GloBI documentées sur 5 types (connectance 17.0%, filtre Serrano α=0.2). Les 8 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,2°C
Annual rain
668mm
Moisture idx (CMI)
-0,04
Runoff
469mm/an
PET
698mm
AET
521mm
Mean slope
0,6°
Water table
28cm
Forest
0%
Crops
52%
Urban
29%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)