HydroBASINS lev08 watershed · #2080425390
Bassin de l'Helpe Mineure
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 : Aisne, Nord
Sub-basin area
517,1km²
Upstream area
517,1km²
Discharge
5,98m³/s
Mean elev.
180m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 376.7 km²72.6% of basin
- 142.2 km²27.4% of basin
61 communes (GADM L5)Available for FRA, RWA
- Le Nouvion-en-Thiérache28.28 km²58% commune
- Cartignies26.46 km²100% commune
- Étrœungt25.47 km²100% commune
- Locquignol24.98 km²26% commune
- Prisches22.71 km²100% commune
- Maroilles22.34 km²98% commune
- La Flamengrie21.89 km²81% commune
- Landrecies21.57 km²98% commune
- Fourmies19.78 km²85% commune
- Trélon19.23 km²48% commune
- Floyon17.30 km²100% commune
- Fesmy-le-Sart16.13 km²100% commune
- Ors14.41 km²82% commune
- Féron13.97 km²100% commune
- Wignehies13.91 km²100% commune
- Catillon-sur-Sambre13.35 km²98% commune
- Glageon11.55 km²100% commune
- Le Favril11.30 km²100% commune
- Rocquigny11.03 km²100% commune
- Oisy10.92 km²100% commune
- Fontenelle10.33 km²100% commune
- Boué10.06 km²94% commune
- La Groise9.35 km²100% commune
- Boulogne-sur-Helpe8.64 km²100% commune
- Grand-Fayt8.61 km²99% commune
- Beaurepaire-sur-Sambre8.26 km²100% commune
- Clairfontaine7.69 km²54% commune
- Barzy-en-Thiérache7.49 km²100% commune
- Petit-Fayt7.06 km²84% commune
- Sains-du-Nord6.74 km²44% commune
- Rejet-de-Beaulieu6.30 km²100% commune
- Ohain5.99 km²51% commune
- Rainsars5.53 km²92% commune
- Mazinghien5.49 km²60% commune
- Larouillies5.10 km²100% commune
- Bergues-sur-Sambre4.58 km²100% commune
- Liessies4.41 km²25% commune
- Sémeries3.42 km²25% commune
- Haut-Lieu3.33 km²39% commune
- Wassigny2.93 km²42% commune
- Étreux2.85 km²29% commune
- Ribeauville2.70 km²82% commune
- Fontaine-au-Bois2.55 km²34% commune
- Noyelles-sur-Sambre2.32 km²36% commune
- Vénérolles2.16 km²24% commune
- Papleux1.83 km²100% commune
- Avesnelles1.60 km²12% commune
- Anor0.89 km²4% commune
- Sassegnies0.79 km²19% commune
- Berlaimont0.75 km²6% commune
- Saint-Hilaire-sur-Helpe0.42 km²3% commune
- Saint-Martin-Rivière0.39 km²7% commune
- Marbaix0.39 km²6% commune
- Bazuel0.36 km²3% commune
- Hannapes0.34 km²4% commune
- La Capelle0.26 km²2% commune
- Esquéhéries0.16 km²1% commune
- Wimy0.10 km²1% commune
- La Neuville-lès-Dorengt0.04 km²0% commune
- Taisnières-en-Thiérache0.04 km²0% commune
- Mondrepuis0.00 km²0% commune
9 intersecting protected areas
Avesnois
IUCN VRegional Nature Park
349.77 km² overlap
Forêt, bocage, étangs de Thiérache
IUCN Not ReportedSpecial Protection Area (Birds Directive)
18.90 km² overlap
Vallée de la Sambre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.78 km² overlap
Special Areas of Conservation (Habitats Directive)
4.10 km² overlap
Land acquired by a regional conservatory of natural areas
0.86 km² overlap
Forêts de Mormal et de Bois l'Evêque, Bois de la Lanière et Plaine alluviale de la Sambre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.60 km² overlap
Prairies Du Val De Sambre
IUCN IVRegional Nature Reserve
0.38 km² overlap
ferme a lunettes
IUCN IVLand acquired by a regional conservatory of natural areas
0.37 km² overlap
etang de la carnaille
IUCN IVLand acquired by a regional conservatory of natural areas
0.13 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 454 distinct species · 195 580 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 l'Helpe Mineure : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 107 interactions GloBI sur 6 types (connectance 18.0%, 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°
9,4°C
Annual rain
805mm
Moisture idx (CMI)
0,06
Runoff
353mm/an
PET
756mm
AET
576mm
Mean slope
1,5°
Water table
101cm
Forest
13%
Crops
22%
Urban
2%
Protected
67%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)