HydroBASINS lev08 watershed · #2080499640
Bassin de la Roumer
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 : Indre-et-Loire
Sub-basin area
122,2km²
Upstream area
122,2km²
Discharge
0,77m³/s
Mean elev.
92m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 122.5 km²100.0% of basin
13 communes (GADM L5)Available for FRA, RWA
- Langeais39.87 km²66% commune
- Avrillé-les-Ponceaux28.82 km²88% commune
- Cléré-les-Pins13.75 km²38% commune
- Saint-Michel-sur-Loire10.09 km²58% commune
- Hommes9.06 km²30% commune
- Mazières-de-Touraine7.55 km²22% commune
- Les Essards4.04 km²100% commune
- Savigné-sur-Lathan3.06 km²17% commune
- Continvoir2.71 km²7% commune
- Ambillou1.40 km²3% commune
- Saint-Patrice1.38 km²8% commune
- Ingrandes-de-Touraine0.70 km²8% commune
- Restigné0.10 km²0% commune
5 intersecting protected areas
Lac de Rillé et forêts voisines d'Anjou et de Touraine
IUCN Not ReportedSpecial Protection Area (Birds Directive)
96.67 km² overlap
Loire-Anjou-Touraine
IUCN VRegional Nature Park
87.74 km² overlap
Complexe du Changeon et de la Roumer
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.45 km² overlap
Vallée de la Loire d'Indre-et-Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.00 km² overlap
La Loire de Candes Saint Martin à Mosnes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 329 distinct species · 156 710 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 Roumer : 33 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 133 interactions GloBI sur 5 types (connectance 15.4%, 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°
11,3°C
Annual rain
687mm
Moisture idx (CMI)
-0,21
Runoff
197mm/an
PET
871mm
AET
576mm
Mean slope
1,3°
Water table
94cm
Forest
58%
Crops
18%
Urban
0%
Protected
68%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)