HydroBASINS lev08 watershed · #2080022470
Bassin de la Liane
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 2 administrative regions : Nord, Pas-de-Calais
Sub-basin area
1 095,4km²
Upstream area
1 095,4km²
Discharge
1,23m³/s
Mean elev.
49m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 1079.2 km²98.2% of basin
- 1.6 km²0.1% of basin
129 communes (GADM L5)Available for FRA, RWA
- Marck37.15 km²100% commune
- Oye-Plage35.14 km²94% commune
- Calais34.69 km²100% commune
- Baincthun27.40 km²100% commune
- Guînes25.79 km²100% commune
- Wimille22.40 km²100% commune
- Les Attaques20.80 km²100% commune
- Neufchâtel-Hardelot20.57 km²97% commune
- Vieille-Église19.50 km²93% commune
- Wierre-Effroy19.15 km²100% commune
- Rety18.00 km²100% commune
- Condette17.08 km²100% commune
- Guemps15.53 km²100% commune
- Samer15.21 km²91% commune
- Sangatte14.64 km²100% commune
- Audinghen14.23 km²100% commune
- Saint-Étienne-au-Mont14.06 km²100% commune
- Marquise13.79 km²100% commune
- Hames-Boucres13.59 km²100% commune
- Ardres13.58 km²100% commune
- Bazinghen13.19 km²100% commune
- Offekerque13.15 km²100% commune
- Nortkerque13.07 km²100% commune
- Camiers12.98 km²81% commune
- Louches12.71 km²99% commune
- Saint-Martin-Boulogne12.66 km²100% commune
- Wissant12.57 km²100% commune
- Wirwignes12.41 km²100% commune
- Crémarest11.79 km²100% commune
- Fiennes11.73 km²100% commune
- Quesques10.87 km²76% commune
- Longfossé10.66 km²99% commune
- Dannes10.26 km²100% commune
- Colembert10.24 km²98% commune
- Peuplingues10.12 km²100% commune
- Alincthun9.93 km²100% commune
- Lottinghen9.74 km²91% commune
- Nouvelle-Église9.67 km²100% commune
- Coulogne9.42 km²100% commune
- Pihen-lès-Guînes9.35 km²100% commune
- Belle-et-Houllefort9.28 km²100% commune
- Ferques9.27 km²100% commune
- Bournonville9.15 km²100% commune
- Desvres8.92 km²97% commune
- Coquelles8.88 km²100% commune
- Hardinghen8.74 km²100% commune
- Zutkerque8.72 km²52% commune
- Tardinghen8.46 km²100% commune
- Bonningues-lès-Calais8.39 km²100% commune
- Saint-Omer-Capelle8.16 km²77% commune
- Rinxent8.12 km²100% commune
- Fréthun8.08 km²100% commune
- Wimereux7.99 km²100% commune
- Audembert7.98 km²100% commune
- Leubringhen7.94 km²100% commune
- Escalles7.88 km²100% commune
- Bouquehault7.87 km²97% commune
- Pernes-lès-Boulogne7.85 km²100% commune
- Boulogne-sur-Mer7.73 km²100% commune
- Boursin7.72 km²100% commune
- Audruicq7.53 km²53% commune
- Saint-Tricat7.45 km²100% commune
- Andres7.44 km²100% commune
- Landrethun-le-Nord7.38 km²100% commune
- Brêmes7.36 km²100% commune
- Hesdin-l'Abbé7.28 km²100% commune
- Outreau7.07 km²100% commune
- Verlincthun7.06 km²100% commune
- Isques7.03 km²100% commune
- Leulinghen-Bernes6.92 km²100% commune
- Tingry6.77 km²61% commune
- La Capelle-lès-Boulogne6.52 km²100% commune
- Saint-Inglevert6.52 km²100% commune
- Carly6.25 km²100% commune
- Brunembert6.23 km²100% commune
- Ambleteuse6.10 km²100% commune
- Selles6.07 km²100% commune
- Hermelinghen6.07 km²98% commune
- Henneveux5.90 km²100% commune
- Echinghen5.82 km²100% commune
- Questrecques5.73 km²100% commune
- Hervelinghen5.73 km²100% commune
- Landrethun-lès-Ardres5.69 km²99% commune
- Campagne-lès-Guines5.69 km²100% commune
- Menneville5.60 km²99% commune
- Audresselles5.55 km²100% commune
- Balinghem5.54 km²100% commune
- Licques5.51 km²30% commune
- Bellebrune5.27 km²100% commune
- Caffiers5.06 km²100% commune
- Nielles-lès-Ardres4.72 km²100% commune
- Nesles4.72 km²93% commune
- Beuvrequen4.71 km²100% commune
- Rodelinghem4.53 km²100% commune
- Le Portel4.47 km²100% commune
- Équihen-Plage4.15 km²100% commune
- Maninghen-Henne3.99 km²100% commune
- Saint-Martin-Choquel3.99 km²68% commune
- Nabringhen3.88 km²99% commune
- Wierre-au-Bois3.58 km²100% commune
- Longueville3.48 km²100% commune
- Saint-Léonard3.34 km²100% commune
- Hesdigneul-lès-Boulogne3.19 km²100% commune
- Vieil-Moutier2.92 km²51% commune
- Saint-Folquin2.87 km²16% commune
- Autingues2.58 km²100% commune
- Offrethun2.49 km²100% commune
- Nielles-lès-Calais2.40 km²100% commune
- Wacquinghen2.31 km²100% commune
- Pittefaux2.24 km²100% commune
- Conteville-lès-Boulogne1.96 km²100% commune
- Courset1.71 km²16% commune
- Grand-Fort-Philippe1.52 km²43% commune
- Escœuilles1.27 km²21% commune
- Widehem1.21 km²16% commune
- Zouafques1.00 km²26% commune
- Surques0.91 km²13% commune
- Halinghen0.75 km²14% commune
- Lacres0.74 km²9% commune
- Le Wast0.74 km²100% commune
- Tournehem-sur-la-Hem0.70 km²4% commune
- Alembon0.47 km²5% commune
- Clerques0.44 km²6% commune
- Bainghen0.37 km²6% commune
- Étaples0.16 km²1% commune
- Sanghen0.07 km²1% commune
- Herbinghen0.05 km²1% commune
- Gravelines0.03 km²0% commune
- Bléquin0.01 km²0% commune
30 intersecting protected areas
Caps Et Marais D\'Opale
IUCN VRegional Nature Park
683.30 km² overlap
Estuaire de la Canche, dunes picardes plaquées sur l'ancienne falaise, forêt d'Hardelot et falaise d'Equihen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.36 km² overlap
Special Areas of Conservation (Habitats Directive)
13.23 km² overlap
Mont saint-frieux
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
6.38 km² overlap
Falaises et pelouses du Cap Blanc Nez, du Mont d'Hubert, des Noires Mottes, du Fond de la Forge et du Mont de Couple
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.82 km² overlap
Marine Nature Park
5.73 km² overlap
Falaises du Cran aux Oeufs et du Cap Gris-Nez, Dunes du Chatelet, Marais de Tardinghen et Dunes de Wissant
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.67 km² overlap
Cap Gris-Nez
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.63 km² overlap
Pelouses et bois neutrocalcicoles de la cuesta sud du Boulonnais
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.19 km² overlap
21 more protected areassorted by overlap area
Falaises et dunes de Wimereux, estuaire de la Slack, Garennes et Communaux d'Ambleteuse-Audresselles
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.09 km² overlap
Cap blanc nez
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.63 km² overlap
Estuaire de la Canche
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.57 km² overlap
Le platier d\'oye
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.56 km² overlap
Fort vert
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.41 km² overlap
Platier D\'Oye
IUCN IVNational Nature Reserve
3.32 km² overlap
Platier d'Oye
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.20 km² overlap
Le Fort Vert
IUCN IVBiotope Protection Order
3.15 km² overlap
Les garennes de lornel
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.11 km² overlap
Baie De Canche
IUCN IVNational Nature Reserve
2.96 km² overlap
Biotope Protection Order
2.88 km² overlap
Biotope Protection Order
2.55 km² overlap
Pelouses et bois neutrocalcicoles des cuestas du Boulonnais et du Pays de Licques et forêt de Guines
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.37 km² overlap
Baie de la slack
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
2.11 km² overlap
Dunes d\'ecault
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
2.02 km² overlap
Cap gris nez
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.62 km² overlap
Prairies et marais tourbeux de Guines
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.39 km² overlap
Cap Blanc Nez
IUCN IVBiotope Protection Order
1.25 km² overlap
Baie de wissant
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.24 km² overlap
Pré Communal D\'Ambleteuse
IUCN IVBiotope Protection Order
1.14 km² overlap
Coteau de Dannes et de Camiers
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.96 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 535 distinct species · 1 006 150 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 Liane : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 139 interactions GloBI sur 6 types (connectance 24.8%, 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).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,3°C
Annual rain
630mm
Moisture idx (CMI)
0,00
Runoff
564mm/an
PET
631mm
AET
474mm
Mean slope
2,2°
Water table
118cm
Forest
3%
Crops
54%
Urban
12%
Protected
64%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)