Ontologia

HydroBASINS lev08 watershed · #2080022190

Bassin de la Valmont

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 : Seine-Maritime

Coastal basinPfafstetter: 23250103

Sub-basin area

616,2km²

Upstream area

616,2km²

Discharge

1,23m³/s

Mean elev.

103m

Administrative coverage

1 dept-equivalent regions (GADM L2)

113 communes (GADM L5)

12 intersecting protected areas

3 more protected areas

  • Val ausson

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.18 km² overlap

  • Vallee de la durdent

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.03 km² overlap

  • Valleuse d’yport

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.00 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

4 663 distinct species · 140 363 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

140 363 obs · 20 cellules
Obs. / cellule
≥ 36 322
15 929–36 321
6 171–15 928
4 718–6 170
< 4 718

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de la Valmont : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 118 interactions GloBI sur 5 types (connectance 14.4%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
118
Connectance
0.144
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

10,2°C

Annual rain

727mm

Moisture idx (CMI)

-0,03

Runoff

629mm/an

PET

752mm

AET

543mm

Mean slope

2,2°

Water table

109cm

Forest

3%

Crops

49%

Urban

6%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)