HydroBASINS lev08 watershed · #2080399500
Bassin de Maas
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 27 administrative regions across 3 countries : Beek, Beekdaelen, Brunssum, Echt-Susteren, Eijsden-Margraten +22
Sub-basin area
2 636,6km²
Upstream area
23 014,8km²
Discharge
272,23m³/s
Mean elev.
102m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Meuse1255 km²
- Bassin de Ourthe6 km²
27 dept-equivalent regions (GADM L2)
- 765.2 km²28.9% of basin
- 753.6 km²28.5% of basin
- Heinsberg116.2 km²4.4% of basin
- 93.4 km²3.5% of basin
- 79.7 km²3.0% of basin
- 78.5 km²3.0% of basin
- 75.8 km²2.9% of basin
- 75.8 km²2.9% of basin
19 moreFull L2 list
- Leudal74.9 km² · 2.8%
- Gulpen-Wittem71.9 km² · 2.7%
- Maastricht62.5 km² · 2.4%
- Maasgouw59.5 km² · 2.2%
- Heerlen43.3 km² · 1.6%
- Valkenburg aan de Geul37.0 km² · 1.4%
- Nederweert34.5 km² · 1.3%
- Voerendaal31.4 km² · 1.2%
- Meerssen28.7 km² · 1.1%
- Stein26.1 km² · 1.0%
- Vaals24.6 km² · 0.9%
- Städteregion Aachen21.2 km² · 0.8%
- Beek21.1 km² · 0.8%
- Roerdalen17.9 km² · 0.7%
- Simpelveld15.8 km² · 0.6%
- Brunssum15.2 km² · 0.6%
- Roermond11.4 km² · 0.4%
- Landgraaf10.1 km² · 0.4%
- Kerkrade1.0 km² · 0.0%
30 intersecting protected areas
NNN-LI
IUCN Not AssignedNature Reserves owned by professional nature management organizations
194.93 km² overlap
Hamonterheide, Hageven, Buitenheide, Stamprooierbroek en Mariahof
IUCN Not ReportedSpecial Protection Area (Birds Directive)
82.54 km² overlap
De Hoge Kempen
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
49.23 km² overlap
Mechelse Heide en vallei van de Ziepbeek
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
37.11 km² overlap
Geuldal
IUCN IVNature Conservation Act
27.23 km² overlap
Geuldal
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
27.23 km² overlap
Abeek met aangrenzende moerasgebieden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.16 km² overlap
Bocholt, Hechtel-Eksel, Meeuwen-Gruitrode, Neerpelt en Peer
IUCN Not ReportedSpecial Protection Area (Birds Directive)
23.80 km² overlap
De Mechelse Heide en de Vallei van de Ziepbeek
IUCN Not ReportedSpecial Protection Area (Birds Directive)
23.30 km² overlap
21 more protected areassorted by overlap area
Itterbeek met Brand, Jagersborg en Schootsheide en Bergerven
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.69 km² overlap
LSG-Aachen
IUCN VLandscape Protection Area
18.18 km² overlap
Het Stamprooierbroek, St.-Maartensheide en omgeving (inclusief Lozerheide en Smeetshof)
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
16.68 km² overlap
Voerstreek
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.92 km² overlap
Mangelbeek en heide- en vengebieden tussen Houthalen en Gruitrode
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.43 km² overlap
NBP-LI-23-0115 type 4
IUCN IVNature management plan type 4 (Flemish Region)
14.26 km² overlap
De Ruiterskuilen-Oudsberg-Solterheide
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
13.15 km² overlap
LSG-Teverener Heide
IUCN VLandscape Protection Area
12.77 km² overlap
Voeren
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
11.17 km² overlap
Uiterwaarden langs de Limburgse Maas met Vijverbroek
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.79 km² overlap
NBP-LI-20-0180 type 2
IUCN VINature management plan type 2 (Flemish Region)
7.50 km² overlap
NBP-LI-20-0174 type 2
IUCN VINature management plan type 2 (Flemish Region)
7.46 km² overlap
Vallée de la Gueule en aval de Kelmis
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.97 km² overlap
Vallée de la Gueule en aval de Kelmis
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.97 km² overlap
Basse vallée du Geer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.56 km² overlap
Brunssummerheide
IUCN IVNature Conservation Act
5.42 km² overlap
Brunssummerheide
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
5.42 km² overlap
De Abeek
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
5.35 km² overlap
Houthalen-Helchteren, Meeuwen-Gruitrode en Peer
IUCN Not ReportedSpecial Protection Area (Birds Directive)
5.17 km² overlap
Het Bergerven
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
4.95 km² overlap
De Brand-Jagersborg
IUCN Not AssignedFlemish Ecological Network (Flemish Region)
4.89 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
22 730 distinct species · 9 082 314 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Maas : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 129 interactions GloBI sur 5 types (connectance 17.4%, filtre Serrano α=0.2). 12 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°
9,6°C
Annual rain
827mm
Moisture idx (CMI)
0,12
Runoff
391mm/an
PET
722mm
AET
578mm
Mean slope
1,5°
Water table
112cm
Forest
8%
Crops
31%
Urban
36%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)