HydroBASINS lev08 watershed · #2080523430
Bassin du Mignon
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 : Charente-Maritime, Deux-Sèvres, Vendée
Sub-basin area
495,1km²
Upstream area
495,3km²
Discharge
8,52m³/s
Mean elev.
40m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 343.6 km²69.2% of basin
- 152.6 km²30.7% of basin
- 0.2 km²0.0% of basin
50 communes (GADM L5)Available for FRA, RWA
- Marigny32.42 km²100% commune
- Mauzé-sur-le-Mignon23.94 km²100% commune
- Beauvoir-sur-Niort23.48 km²100% commune
- Marsais23.13 km²97% commune
- Saint-Hilaire-la-Palud22.37 km²65% commune
- Granzay-Gript21.23 km²98% commune
- Prissé-la-Charrière20.92 km²100% commune
- La Foye-Monjault19.67 km²100% commune
- Dœuil-sur-le-Mignon19.46 km²100% commune
- Saint-Pierre-d'Amilly18.73 km²94% commune
- Saint-Saturnin-du-Bois17.98 km²73% commune
- Villiers-en-Bois17.92 km²95% commune
- Usseau16.23 km²100% commune
- Prin-Deyrançon16.02 km²100% commune
- Cramchaban16.00 km²100% commune
- Frontenay-Rohan-Rohan11.90 km²35% commune
- Belleville11.73 km²100% commune
- La Grève-sur-Mignon11.44 km²100% commune
- Benon10.28 km²21% commune
- Saint-Félix9.36 km²59% commune
- Vallans9.10 km²100% commune
- La Rochénard8.88 km²100% commune
- Boisserolles8.49 km²98% commune
- Le Bourdet8.22 km²100% commune
- Fors7.93 km²43% commune
- Saint-Martin-de-Bernegoue7.93 km²45% commune
- Épannes7.92 km²100% commune
- Priaires7.22 km²100% commune
- Saint-Georges-de-Rex6.84 km²38% commune
- Villeneuve-la-Comtesse6.60 km²41% commune
- Juscorps6.50 km²100% commune
- Courçon6.48 km²33% commune
- La Ronde6.21 km²30% commune
- Thorigny-sur-le-Mignon5.05 km²100% commune
- Saint-Étienne-la-Cigogne4.82 km²100% commune
- Saint-Romans-des-Champs4.17 km²97% commune
- La Laigne4.13 km²100% commune
- Amuré3.81 km²25% commune
- Brûlain2.79 km²12% commune
- Les Fosses2.62 km²22% commune
- Chizé2.01 km²9% commune
- Migré1.23 km²8% commune
- Le Vert0.95 km²8% commune
- Saint-Symphorien0.50 km²3% commune
- Bernay-Saint-Martin0.49 km²2% commune
- La Croix-Comtesse0.40 km²17% commune
- Saint-Séverin-sur-Boutonne0.32 km²4% commune
- Vergné0.25 km²3% commune
- Damvix0.18 km²2% commune
- Saint-Georges-du-Bois0.11 km²0% commune
16 intersecting protected areas
Marais Poitevin
IUCN VRegional Nature Park
181.98 km² overlap
Plaine de Niort Sud-Est
IUCN Not ReportedSpecial Protection Area (Birds Directive)
94.45 km² overlap
Massif forestier de Chizé-Aulnay
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
51.16 km² overlap
Marais poitevin
IUCN IIIWetland of International Importance (Ramsar Site)
51.11 km² overlap
Marais poitevin
IUCN Not ReportedSpecial Protection Area (Birds Directive)
50.49 km² overlap
Marais Poitevin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
50.31 km² overlap
Sylve D\'Argenson
IUCN IaForest Integral Biological Reserve
19.78 km² overlap
Land acquired by a regional conservatory of natural areas
0.33 km² overlap
Land acquired by a regional conservatory of natural areas
0.29 km² overlap
7 more protected areassorted by overlap area
Tourbière Du Bourdet
IUCN IVBiotope Protection Order
0.26 km² overlap
les pierrailleuses - mc
IUCN IVLand acquired by a regional conservatory of natural areas
0.20 km² overlap
Land acquired by a regional conservatory of natural areas
0.19 km² overlap
Marais Poitevin
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.18 km² overlap
Land acquired by a regional conservatory of natural areas
0.11 km² overlap
tourbiere du bourdet - amure
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
tourbieres de prin-deyrancon
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 523 distinct species · 272 367 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 48 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 du Mignon : 39 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 114 interactions GloBI sur 6 types (connectance 9.7%, filtre Serrano α=0.2). 10 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°
12,2°C
Annual rain
805mm
Moisture idx (CMI)
-0,07
Runoff
534mm/an
PET
867mm
AET
602mm
Mean slope
0,8°
Water table
56cm
Forest
4%
Crops
65%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)