Ontologia

HydroBASINS lev08 watershed · #2080023040

Bassin de Ringvaart van de Haarlemmermeerpolder

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 32 administrative regions : Aalsmeer, Alphen aan den Rijn, Amstelveen, Amsterdam, Bloemendaal +27

36% lakePfafstetter: 23270102

Sub-basin area

1 024,3km²

Upstream area

1 024,6km²

Discharge

14,74m³/s

Mean elev.

-2m

Administrative coverage

32 dept-equivalent regions (GADM L2)

24 more

16 intersecting protected areas

  • NNN-ZH

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    59.86 km² overlap

  • NNN-NH

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    40.18 km² overlap

  • NNN-UT

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    36.67 km² overlap

  • Nieuwkoopse Plassen & De Haeck

    IUCN IV

    Nature Conservation Act

    20.09 km² overlap

  • Nieuwkoopse Plassen & de Haeck

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    20.09 km² overlap

  • Nieuwkoopse Plassen & De Haeck

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    19.86 km² overlap

  • Kennemerland-Zuid

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    17.58 km² overlap

  • Kennemerland-Zuid

    IUCN IV

    Nature Conservation Act

    17.58 km² overlap

  • Meijendel & Berkheide

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    4.82 km² overlap

7 more protected areas

  • Meijendel & Berkheide

    IUCN IV

    Nature Conservation Act

    4.81 km² overlap

  • Botshol

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.18 km² overlap

  • Botshol

    IUCN IV

    Nature Conservation Act

    2.18 km² overlap

  • De Wilck

    IUCN IV

    Nature Conservation Act

    0.70 km² overlap

  • De Wilck

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    0.70 km² overlap

  • Coepelduynen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.09 km² overlap

  • Coepelduynen

    IUCN IV

    Nature Conservation Act

    0.09 km² overlap

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

Species present

16 214 distinct species · 5 137 783 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

5 137 783 obs · 33 cellules
Obs. / cellule
≥ 772 913
324 880–772 912
170 444–324 879
99 958–170 443
< 99 958

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 Ringvaart van de Haarlemmermeerpolder : 25 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 6 types (connectance 15.6%, filtre Serrano α=0.2). 17 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
134
Connectance
0.156
Patrimoniales
3
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°

9,4°C

Annual rain

797mm

Moisture idx (CMI)

0,20

Runoff

489mm/an

PET

635mm

AET

516mm

Mean slope

0,2°

Water table

6cm

Forest

4%

Crops

12%

Urban

64%

Protected

5%

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