HydroBASINS lev08 watershed · #2080495410
Bassin du Cosson
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 : Loir-et-Cher, Loiret
Sub-basin area
732km²
Upstream area
732km²
Discharge
5,29m³/s
Mean elev.
115m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 378.6 km²51.6% of basin
- 355.5 km²48.4% of basin
39 communes (GADM L5)Available for FRA, RWA
- La Ferté-Saint-Aubin82.94 km²96% commune
- Ligny-le-Ribault56.23 km²96% commune
- Ménestreau-en-Villette54.84 km²100% commune
- Sennely49.97 km²100% commune
- Chambord46.22 km²85% commune
- La Ferté-Saint-Cyr44.38 km²75% commune
- Vouzon39.20 km²50% commune
- Vannes-sur-Cosson34.77 km²99% commune
- Marcilly-en-Villette34.70 km²56% commune
- Yvoy-le-Marron33.17 km²65% commune
- Villeny25.67 km²72% commune
- Crouy-sur-Cosson23.26 km²81% commune
- Huisseau-sur-Cosson19.69 km²86% commune
- Jouy-le-Potier19.23 km²37% commune
- Chaumont-sur-Tharonne17.82 km²22% commune
- Dhuizon14.81 km²32% commune
- Thoury14.61 km²91% commune
- Tigy14.20 km²30% commune
- Chailles13.14 km²69% commune
- Vienne-en-Val12.58 km²35% commune
- Souvigny-en-Sologne12.45 km²30% commune
- Mont-près-Chambord11.66 km²41% commune
- Vineuil10.30 km²47% commune
- Isdes9.96 km²23% commune
- Saint-Gervais-la-Forêt8.18 km²90% commune
- Candé-sur-Beuvron6.54 km²44% commune
- Tour-en-Sologne3.81 km²14% commune
- Neuvy3.36 km²11% commune
- Ardon3.21 km²6% commune
- Neuvy-en-Sullias3.06 km²12% commune
- Les Montils2.87 km²32% commune
- Viglain2.63 km²7% commune
- Blois2.41 km²6% commune
- Maslives1.09 km²15% commune
- Cellettes0.56 km²3% commune
- Lailly-en-Val0.30 km²1% commune
- Lamotte-Beuvron0.16 km²1% commune
- Saint-Claude-de-Diray0.14 km²2% commune
- Saint-Laurent-Nouan0.00 km²0% commune
5 intersecting protected areas
Sologne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
612.66 km² overlap
Chambord
IUCN IVNational Hunting and Wildlife Reserve
46.48 km² overlap
Domaine de Chambord
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
42.06 km² overlap
Domaine de Chambord
IUCN Not ReportedSpecial Protection Area (Birds Directive)
42.00 km² overlap
Le Côteau
IUCN IVForest Managed Biological Reserve
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 004 distinct species · 411 086 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Cosson : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 5 types (connectance 19.0%, filtre Serrano α=0.2). 8 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°
10,9°C
Annual rain
655mm
Moisture idx (CMI)
-0,23
Runoff
227mm/an
PET
854mm
AET
553mm
Mean slope
1,0°
Water table
115cm
Forest
64%
Crops
13%
Urban
2%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)