HydroBASINS lev08 watershed · #2080452640
Bassin de la Laize
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 : Calvados
Sub-basin area
184,5km²
Upstream area
184,5km²
Discharge
3,44m³/s
Mean elev.
144m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
42 communes (GADM L5)Available for FRA, RWA
- Boulon13.31 km²95% commune
- Tournebu11.14 km²100% commune
- Saint-Germain-Langot10.50 km²96% commune
- Fontenay-le-Marmion9.89 km²100% commune
- Bretteville-sur-Laize9.87 km²100% commune
- Moulines9.78 km²100% commune
- Fresney-le-Puceux9.74 km²100% commune
- Barbery8.87 km²100% commune
- Ussy8.24 km²97% commune
- Fontaine-le-Pin7.70 km²90% commune
- Saint-Germain-le-Vasson7.29 km²77% commune
- Saint-Laurent-de-Condel7.12 km²58% commune
- Acqueville6.68 km²99% commune
- Bonnœil6.44 km²93% commune
- Leffard6.32 km²95% commune
- Urville5.54 km²91% commune
- Meslay5.53 km²99% commune
- Martainville5.52 km²100% commune
- Gouvix5.34 km²100% commune
- Angoville3.85 km²100% commune
- Clinchamps-sur-Orne3.06 km²50% commune
- Cintheaux2.98 km²39% commune
- Rocquancourt2.63 km²94% commune
- Donnay2.44 km²21% commune
- Saint-Aignan-de-Cramesnil1.97 km²29% commune
- Fresney-le-Vieux1.96 km²74% commune
- Laize-la-Ville1.69 km²100% commune
- May-sur-Orne1.55 km²44% commune
- Pierrefitte-en-Cinglais1.53 km²14% commune
- Cesny-Bois-Halbout1.48 km²23% commune
- Martigny-sur-l'Ante1.26 km²13% commune
- Bons-Tassilly0.93 km²10% commune
- Saint-Martin-de-Fontenay0.84 km²8% commune
- Tréprel0.50 km²9% commune
- Cauvicourt0.43 km²4% commune
- Villers-Canivet0.31 km²3% commune
- Mutrécy0.29 km²4% commune
- Tilly-la-Campagne0.20 km²6% commune
- Grainville-Langannerie0.19 km²4% commune
- Garcelles-Secqueville0.12 km²2% commune
- Potigny0.09 km²2% commune
- Pierrepont0.00 km²0% commune
1 intersecting protected areas
Vallée de l'Orne et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.35 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 820 distinct species · 69 153 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Laize : 25 espèces reliées par 49 interactions GloBI sur 5 types (connectance 11.3%, filtre Serrano α=0.2). 5 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°
10,1°C
Annual rain
726mm
Moisture idx (CMI)
-0,04
Runoff
587mm/an
PET
757mm
AET
551mm
Mean slope
2,2°
Water table
145cm
Forest
3%
Crops
72%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)