HydroBASINS lev08 watershed · #2080485810
Bassin de l'Erve
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 : Mayenne, Sarthe
Sub-basin area
420,9km²
Upstream area
420,9km²
Discharge
3,27m³/s
Mean elev.
113m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Mayenne310.5 km²73.6% of basin
- 111.6 km²26.4% of basin
38 communes (GADM L5)Available for FRA, RWA
- Auvers-le-Hamon40.09 km²83% commune
- Torcé-Viviers-en-CharnieMayenne38.35 km²79% commune
- Saint-Denis-d'Orques37.45 km²79% commune
- Saint-Jean-sur-ErveMayenne24.17 km²96% commune
- Sainte-SuzanneMayenne22.90 km²99% commune
- SaulgesMayenne21.97 km²100% commune
- Cossé-en-ChampagneMayenne21.00 km²100% commune
- ChammesMayenne20.29 km²97% commune
- Saint-Georges-sur-ErveMayenne18.81 km²91% commune
- VoutréMayenne18.32 km²99% commune
- VimarcéMayenne17.71 km²86% commune
- Thorigné-en-CharnieMayenne17.65 km²100% commune
- BalléeMayenne11.91 km²81% commune
- Saint-LégerMayenne11.42 km²67% commune
- Viré-en-Champagne11.24 km²100% commune
- BlandouetMayenne11.14 km²100% commune
- Assé-le-BérengerMayenne11.04 km²97% commune
- Avessé11.01 km²57% commune
- Saint-Pierre-sur-ErveMayenne9.73 km²100% commune
- Épineux-le-SeguinMayenne8.99 km²100% commune
- BannesMayenne8.65 km²100% commune
- Chémeré-le-RoiMayenne8.15 km²51% commune
- Sablé-sur-Sarthe4.28 km²11% commune
- VaigesMayenne3.51 km²10% commune
- Poillé-sur-Vègre3.41 km²20% commune
- Juigné-sur-Sarthe2.40 km²11% commune
- ÉvronMayenne1.73 km²5% commune
- Saint-Martin-de-ConnéeMayenne1.25 km²7% commune
- Rouessé-Vassé1.20 km²4% commune
- Châtres-la-ForêtMayenne0.90 km²7% commune
- La Bazouge-de-ChemeréMayenne0.47 km²2% commune
- Brûlon0.43 km²3% commune
- LivetMayenne0.33 km²3% commune
- Joué-en-Charnie0.08 km²0% commune
- Beaumont-Pied-de-BœufMayenne0.06 km²0% commune
- IzéMayenne0.05 km²0% commune
- Saint-Pierre-sur-OrtheMayenne0.04 km²0% commune
- Sainte-Gemmes-le-RobertMayenne0.01 km²0% commune
6 intersecting protected areas
Bocage de Montsûrs à la forêt de Sillé-le-Guillaume
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
20.42 km² overlap
Normandie-Maine
IUCN VRegional Nature Park
19.02 km² overlap
Vallée de l'Erve en aval de Saint-Pierre-sur-Erve
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.42 km² overlap
Special Areas of Conservation (Habitats Directive)
2.55 km² overlap
Eglise Sainte-Suzanne
IUCN IVBiotope Protection Order
0.00 km² overlap
Eglise Saint Jean-Baptiste
IUCN IVBiotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 380 distinct species · 91 517 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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'Erve : 23 espèces reliées par 121 interactions GloBI sur 5 types (connectance 21.6%, 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°
10,7°C
Annual rain
734mm
Moisture idx (CMI)
-0,12
Runoff
258mm/an
PET
835mm
AET
574mm
Mean slope
2,3°
Water table
178cm
Forest
2%
Crops
51%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)