HydroBASINS lev08 watershed · #2080022610
Bassin de IJzer
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 across 2 countries : Nord, West-Vlaanderen
Sub-basin area
1 554km²
Upstream area
1 554km²
Discharge
22,8m³/s
Mean elev.
16m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 1188.3 km²76.2% of basin
- 371.3 km²23.8% of basin
50 communes (GADM L5)Available for FRA, RWA
- Steenvoorde30.05 km²100% commune
- Wormhout27.81 km²100% commune
- Herzeele17.04 km²100% commune
- Winnezeele15.73 km²100% commune
- Rubrouck14.67 km²100% commune
- Cassel13.78 km²100% commune
- Houtkerque13.38 km²100% commune
- Arnèke13.24 km²100% commune
- Zegerscappel13.08 km²76% commune
- Bollezeele12.87 km²72% commune
- Esquelbecq12.28 km²100% commune
- Godewaersvelde11.96 km²98% commune
- Bambecque11.19 km²100% commune
- Boeschepe10.73 km²81% commune
- Zuytpeene10.54 km²90% commune
- Oudezeele9.55 km²100% commune
- Terdeghem9.05 km²100% commune
- Volckerinckhove7.99 km²80% commune
- Bavinchove7.90 km²86% commune
- Sainte-Marie-Cappel7.31 km²99% commune
- Rexpoëde6.98 km²51% commune
- Ledringhem6.55 km²100% commune
- Noordpeene6.48 km²37% commune
- Quaëdypre6.09 km²32% commune
- West-Cappel5.97 km²75% commune
- Ochtezeele5.97 km²100% commune
- Hardifort5.94 km²100% commune
- Eecke5.74 km²55% commune
- Hondschoote5.48 km²22% commune
- Staple5.18 km²53% commune
- Zermezeele4.93 km²100% commune
- Oxelaëre4.43 km²100% commune
- Wemaers-Cappel4.26 km²100% commune
- Saint-Sylvestre-Cappel4.08 km²53% commune
- Oost-Cappel3.94 km²100% commune
- Broxeele3.72 km²100% commune
- Lederzeele2.54 km²29% commune
- Wylder2.37 km²100% commune
- Buysscheure2.34 km²38% commune
- Killem1.70 km²15% commune
- Hondeghem1.38 km²11% commune
- Crochte1.27 km²15% commune
- Bissezeele1.24 km²39% commune
- Merckeghem0.94 km²9% commune
- Socx0.76 km²10% commune
- Ebblinghem0.34 km²4% commune
- Berthen0.28 km²5% commune
- Flêtre0.24 km²3% commune
- Saint-Jans-Cappel0.04 km²0% commune
- Méteren0.00 km²0% commune
30 intersecting protected areas
Ijzervallei
IUCN Not ReportedSpecial Protection Area (Birds Directive)
51.36 km² overlap
De Ijzerbroeken te Diksmuide en Lo-Reninge
IUCN Not ReportedWetland of International Importance (Ramsar Site)
27.64 km² overlap
Westvlaams Heuvelland
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.42 km² overlap
Special Areas of Conservation (Habitats Directive)
9.30 km² overlap
NBP-WV-23-0013 type 4
IUCN IVNature management plan type 4 (Flemish Region)
8.88 km² overlap
De IJzervallei
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
8.24 km² overlap
Caps Et Marais D\'Opale
IUCN VRegional Nature Park
6.49 km² overlap
Duingebieden inclusief Ijzermonding en Zwin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.22 km² overlap
NBP-WV-18-0007
IUCN IVNature management plan type 4 (Flemish Region)
3.88 km² overlap
21 more protected areassorted by overlap area
De Westkust
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
3.74 km² overlap
Het Wijnendalebos en vallei van de Waterhoenbeek
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
3.67 km² overlap
Westkust
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.45 km² overlap
NBP-WV-22-0301 type 4
IUCN IVNature management plan type 4 (Flemish Region)
2.07 km² overlap
NBP-WV-23-0112 type 4
IUCN IVNature management plan type 4 (Flemish Region)
1.96 km² overlap
NBP-WV-18-0008 type 4
IUCN IVNature management plan type 4 (Flemish Region)
1.93 km² overlap
Het West-Vlaams Heuvelland
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
1.64 km² overlap
De Middenkust
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
1.58 km² overlap
De Historische Polders van Oostende
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
1.58 km² overlap
Nature management plan type 4 (Flemish Region)
1.56 km² overlap
m301
IUCN Not AssignedProtected Dunes (Flemish Region)
1.52 km² overlap
NBP-WV-23-0112 type 2
IUCN VINature management plan type 2 (Flemish Region)
1.50 km² overlap
NBP-WV-23-0105 type 3
IUCN IVNature management plan type 3 (Flemish Region)
1.50 km² overlap
NBP-WV-17-0015 type 4
IUCN IVNature management plan type 4 (Flemish Region)
1.37 km² overlap
NBP-WV-23-0102 type 2
IUCN VINature management plan type 2 (Flemish Region)
1.33 km² overlap
NBP-WV-22-0004 type 2
IUCN VINature management plan type 2 (Flemish Region)
1.26 km² overlap
k304
IUCN Not AssignedProtected Dunes (Flemish Region)
1.25 km² overlap
Polders
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.24 km² overlap
Extended forest management plan (Flemish Region)
1.18 km² overlap
NBP-WV-23-0100 type 4
IUCN IVNature management plan type 4 (Flemish Region)
1.12 km² overlap
NBP-WV-21-0302 type 3
IUCN IVNature management plan type 3 (Flemish Region)
1.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 729 distinct species · 1 941 949 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 IJzer : 33 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 6 types (connectance 15.6%, 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°
10,2°C
Annual rain
678mm
Moisture idx (CMI)
0,04
Runoff
478mm/an
PET
654mm
AET
505mm
Mean slope
0,5°
Water table
30cm
Forest
0%
Crops
58%
Urban
11%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)