HydroBASINS lev08 watershed · #2080522620
Bassin du Clain
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 : Charente, Vienne
Sub-basin area
395,7km²
Upstream area
395,8km²
Discharge
5,36m³/s
Mean elev.
152m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 357.1 km²90.0% of basin
- 39.6 km²10.0% of basin
26 communes (GADM L5)Available for FRA, RWA
- Mauprévoir47.70 km²98% commune
- Pressac43.71 km²88% commune
- Romagne39.69 km²97% commune
- Payroux26.96 km²88% commune
- Sommières-du-Clain25.83 km²99% commune
- La Chapelle-Bâton24.80 km²82% commune
- Champagné-Saint-Hilaire23.76 km²51% commune
- Château-Garnier22.79 km²63% commune
- Saint-Romain20.74 km²100% commune
- Champniers17.48 km²87% commune
- Hiesse16.49 km²67% commune
- Vaux13.17 km²51% commune
- Pleuville12.75 km²38% commune
- Saint-Martin-l'Ars11.60 km²28% commune
- Anché9.46 km²58% commune
- Charroux9.12 km²20% commune
- Joussé7.43 km²100% commune
- Ceaux-en-Couhé6.36 km²39% commune
- Lessac6.10 km²18% commune
- Épenède3.84 km²25% commune
- Blanzay3.25 km²9% commune
- Savigné1.46 km²4% commune
- La Ferrière-Airoux1.30 km²5% commune
- Availles-Limouzine0.49 km²1% commune
- Ansac-sur-Vienne0.25 km²1% commune
- Alloue0.21 km²0% commune
3 intersecting protected areas
Région de Pressac, étang de Combourg
IUCN Not ReportedSpecial Protection Area (Birds Directive)
32.88 km² overlap
etangs de baro
IUCN IVLand acquired by a regional conservatory of natural areas
0.22 km² overlap
bocage de hiesse
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 970 distinct species · 116 693 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Clain : 34 espèces reliées par 98 interactions GloBI sur 5 types (connectance 9.9%, 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°
11,5°C
Annual rain
832mm
Moisture idx (CMI)
-0,08
Runoff
409mm/an
PET
905mm
AET
637mm
Mean slope
1,1°
Water table
61cm
Forest
2%
Crops
54%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)