HydroBASINS lev08 watershed · #2080022550
Bassin de Derivation Ouest du Noortgracht
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 1 administrative regions : Nord
Sub-basin area
200km²
Upstream area
200km²
Discharge
0,34m³/s
Mean elev.
5m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 191.6 km²95.4% of basin
23 communes (GADM L5)Available for FRA, RWA
- Loon-Plage23.75 km²65% commune
- Looberghe19.25 km²100% commune
- Pitgam18.15 km²77% commune
- Dunkerque17.40 km²44% commune
- Grande-Synthe15.11 km²77% commune
- Bourbourg11.84 km²30% commune
- Brouckerque11.69 km²100% commune
- Millam11.57 km²91% commune
- Eringhem11.34 km²100% commune
- Merckeghem10.04 km²91% commune
- Cappelle-Brouck8.27 km²49% commune
- Spycker7.89 km²83% commune
- Gravelines5.05 km²24% commune
- Bollezeele4.96 km²28% commune
- Zegerscappel4.19 km²24% commune
- Drincham3.28 km²100% commune
- Craywick3.23 km²45% commune
- Wulverdinghe1.34 km²45% commune
- Volckerinckhove1.31 km²13% commune
- Armbouts-Cappel0.94 km²9% commune
- Watten0.67 km²9% commune
- Steene0.18 km²2% commune
- Crochte0.13 km²1% commune
6 intersecting protected areas
Grande-Synthe
IUCN IVRegional Nature Reserve
1.71 km² overlap
Bancs des Flandres
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.66 km² overlap
Caps Et Marais D\'Opale
IUCN VRegional Nature Park
0.73 km² overlap
Les salines de fort mardyck
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.63 km² overlap
Bancs des Flandres
IUCN Not ReportedMarine Protected Area (OSPAR)
0.26 km² overlap
Bancs des Flandres
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.26 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 770 distinct species · 117 138 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Derivation Ouest du Noortgracht : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 6 types (connectance 20.1%, filtre Serrano α=0.2). 9 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°
10,4°C
Annual rain
659mm
Moisture idx (CMI)
0,02
Runoff
522mm/an
PET
649mm
AET
496mm
Mean slope
0,4°
Water table
24cm
Forest
0%
Crops
58%
Urban
24%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)