HydroBASINS lev08 watershed · #2080523360
Bassin de la Sèvre Niortaise
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 3 administrative regions : Deux-Sèvres, Vendée, Vienne
Sub-basin area
982,9km²
Upstream area
982,9km²
Discharge
17,81m³/s
Mean elev.
108m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 971.9 km²98.6% of basin
- 11.5 km²1.2% of basin
- 2.0 km²0.2% of basin
73 communes (GADM L5)Available for FRA, RWA
- Niort68.00 km²98% commune
- Pamproux36.01 km²99% commune
- La Crèche34.52 km²100% commune
- Échiré30.95 km²100% commune
- Souvigné26.82 km²100% commune
- Exoudun26.44 km²100% commune
- Verruyes26.07 km²98% commune
- Saint-Georges-de-Noisné24.71 km²100% commune
- Augé24.03 km²100% commune
- Cherveux22.54 km²100% commune
- Azay-le-Brûlé21.76 km²100% commune
- Champdeniers-Saint-Denis21.69 km²100% commune
- Saivres21.09 km²100% commune
- Nanteuil20.32 km²100% commune
- Soudan19.44 km²84% commune
- Villiers-en-Plaine19.10 km²69% commune
- Prailles18.72 km²100% commune
- Exireuil18.58 km²88% commune
- Chey18.03 km²85% commune
- Germond-Rouvre17.81 km²100% commune
- Saint-Gelais16.93 km²100% commune
- La Chapelle-Bâton16.65 km²100% commune
- La Couarde16.57 km²100% commune
- Chenay16.17 km²74% commune
- Vouillé15.41 km²70% commune
- Clavé15.23 km²77% commune
- Mazières-en-Gâtine14.97 km²77% commune
- La Mothe-Saint-Héray14.85 km²100% commune
- Aigonnay14.76 km²100% commune
- Saint-Maxire14.59 km²100% commune
- Chauray14.28 km²100% commune
- Sainte-Eanne13.53 km²100% commune
- Coulon13.35 km²45% commune
- Sepvret13.21 km²77% commune
- Saint-Martin-de-Saint-Maixent12.94 km²100% commune
- Saint-Rémy12.70 km²93% commune
- Avon12.61 km²100% commune
- Bougon12.27 km²100% commune
- Thorigné11.80 km²63% commune
- Sainte-Ouenne11.51 km²100% commune
- Romans11.50 km²100% commune
- Surin10.94 km²81% commune
- Saint-Christophe-sur-Roc10.85 km²100% commune
- Sainte-Néomaye10.68 km²100% commune
- Mougon10.20 km²47% commune
- Cours10.17 km²67% commune
- Magné9.89 km²69% commune
- Saint-Lin9.36 km²82% commune
- Rouillé9.22 km²18% commune
- François9.17 km²100% commune
- Fressines9.14 km²100% commune
- Beaussais8.94 km²56% commune
- Faye-sur-Ardin8.26 km²55% commune
- Salles7.97 km²100% commune
- Fomperron6.12 km²35% commune
- Saint-Marc-la-Lande5.78 km²55% commune
- Saint-Maixent-l'École5.25 km²100% commune
- Lezay4.95 km²11% commune
- Bessines4.79 km²42% commune
- Sciecq4.34 km²100% commune
- Vitré3.55 km²36% commune
- Vouhé3.09 km²22% commune
- Aiffres2.65 km²10% commune
- Saint-Sauvant2.26 km²4% commune
- Benet2.01 km²4% commune
- Saint-Pardoux1.25 km²4% commune
- Béceleuf0.99 km²5% commune
- Reffannes0.40 km²5% commune
- Saint-Germier0.31 km²3% commune
- Xaintray0.20 km²2% commune
- Sansais0.14 km²1% commune
- Saint-Symphorien0.06 km²0% commune
- Saint-Léger-de-la-Martinière0.00 km²0% commune
26 intersecting protected areas
Marais Poitevin
IUCN VRegional Nature Park
97.65 km² overlap
Plaine de La Mothe-Saint-Héray-Lezay
IUCN Not ReportedSpecial Protection Area (Birds Directive)
76.33 km² overlap
Plaine de Niort Nord-Ouest
IUCN Not ReportedSpecial Protection Area (Birds Directive)
68.82 km² overlap
Vallée du Magnerolles
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.20 km² overlap
Biotope Protection Order
17.98 km² overlap
Chaumes d'Avon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.11 km² overlap
Plaine de Niort Sud-Est
IUCN Not ReportedSpecial Protection Area (Birds Directive)
13.42 km² overlap
Marais poitevin
IUCN IIIWetland of International Importance (Ramsar Site)
9.41 km² overlap
Marais Poitevin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.41 km² overlap
17 more protected areassorted by overlap area
Marais poitevin
IUCN Not ReportedSpecial Protection Area (Birds Directive)
9.41 km² overlap
Venise Verte
IUCN IVBiotope Protection Order
6.39 km² overlap
Land acquired by a regional conservatory of natural areas
0.24 km² overlap
Bocage Des Antonins
IUCN IVRegional Nature Reserve
0.23 km² overlap
cote-belet
IUCN IVLand acquired by a regional conservatory of natural areas
0.19 km² overlap
champs-pourris
IUCN IVLand acquired by a regional conservatory of natural areas
0.12 km² overlap
pierre-levee
IUCN IVLand acquired by a regional conservatory of natural areas
0.10 km² overlap
Land acquired by a regional conservatory of natural areas
0.10 km² overlap
Land acquired by a regional conservatory of natural areas
0.09 km² overlap
vallee du magnerolles
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
Land acquired by a regional conservatory of natural areas
0.05 km² overlap
marais de la garette
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
plaine de saint-remy
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
plaine de rouille a lezay
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
Citerne de Sainte-Ouenne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
citerne de sainte-ouenne
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
Ancienne Citerne D\'Eau
IUCN IVBiotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 978 distinct species · 293 068 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 la Sèvre Niortaise : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 248 interactions GloBI sur 6 types (connectance 14.0%, filtre Serrano α=0.2). 45 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°
11,7°C
Annual rain
807mm
Moisture idx (CMI)
-0,07
Runoff
474mm/an
PET
870mm
AET
607mm
Mean slope
1,9°
Water table
111cm
Forest
0%
Crops
58%
Urban
6%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)