HydroBASINS lev08 watershed · #2080432580
Bassin de l'Hallue
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 : Somme
Sub-basin area
275,3km²
Upstream area
2 459,6km²
Discharge
29,74m³/s
Mean elev.
91m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Somme Rivière1804 km²
- Bassin de Ancre381 km²
1 dept-equivalent regions (GADM L2)
- 276.2 km²100.0% of basin
60 communes (GADM L5)Available for FRA, RWA
- Warloy-Baillon15.54 km²100% commune
- Toutencourt14.54 km²99% commune
- Blangy-Tronville11.60 km²93% commune
- Mailly-Maillet11.06 km²93% commune
- Querrieu9.89 km²100% commune
- Daours9.04 km²100% commune
- Pont-Noyelles8.67 km²100% commune
- Contay8.50 km²100% commune
- Bussy-lès-Daours7.95 km²100% commune
- Senlis-le-Sec7.80 km²97% commune
- Hérissart7.75 km²100% commune
- Varennes7.73 km²100% commune
- Béhencourt7.58 km²100% commune
- Bavelincourt7.53 km²100% commune
- Molliens-au-Bois7.45 km²100% commune
- Saint-Gratien7.22 km²100% commune
- Aubigny6.95 km²73% commune
- Puchevillers6.85 km²49% commune
- Corbie6.61 km²40% commune
- Forceville6.54 km²87% commune
- Camon6.50 km²50% commune
- Fréchencourt5.73 km²100% commune
- Beaucourt-sur-l'Hallue5.40 km²100% commune
- Rainneville5.29 km²75% commune
- Rubempré5.08 km²49% commune
- Glisy5.03 km²87% commune
- Vadencourt4.86 km²100% commune
- Englebelmer4.84 km²53% commune
- Montigny-sur-l'Hallue4.69 km²100% commune
- Lamotte-Brebière4.52 km²100% commune
- Hédauville4.33 km²100% commune
- Allonville3.66 km²35% commune
- Arquèves3.58 km²46% commune
- Lahoussoye3.25 km²79% commune
- Baizieux3.23 km²62% commune
- Cachy2.69 km²43% commune
- Harponville2.55 km²100% commune
- Villers-Bocage2.44 km²16% commune
- Franvillers2.38 km²54% commune
- Mirvaux2.31 km²100% commune
- Pierregot2.31 km²100% commune
- Longueau2.10 km²60% commune
- Colincamps1.76 km²42% commune
- Hénencourt1.62 km²48% commune
- Vecquemont1.53 km²100% commune
- Bouzincourt1.25 km²16% commune
- Auchonvillers1.22 km²21% commune
- Talmas1.07 km²6% commune
- Beauquesne0.89 km²4% commune
- Raincheval0.79 km²12% commune
- Acheux-en-Amiénois0.65 km²9% commune
- Cardonnette0.58 km²11% commune
- Bresle0.49 km²14% commune
- Gentelles0.49 km²9% commune
- Léalvillers0.13 km²5% commune
- Courcelles-au-Bois0.11 km²5% commune
- Bertrancourt0.04 km²1% commune
- Millencourt0.02 km²0% commune
- Boves0.01 km²0% commune
- Fouilloy0.01 km²0% commune
5 intersecting protected areas
Wetland of International Importance (Ramsar Site)
7.45 km² overlap
Marais de la moyenne Somme entre Amiens et Corbie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.67 km² overlap
Étangs et marais du bassin de la Somme
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.59 km² overlap
le grand marais de la queue
IUCN IVLand acquired by a regional conservatory of natural areas
0.31 km² overlap
Grand Marais De La Queue
IUCN IVBiotope Protection Order
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 144 distinct species · 120 082 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 l'Hallue : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 97 interactions GloBI sur 6 types (connectance 13.1%, 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°
10,0°C
Annual rain
659mm
Moisture idx (CMI)
-0,12
Runoff
453mm/an
PET
746mm
AET
531mm
Mean slope
2,1°
Water table
112cm
Forest
0%
Crops
70%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)