HydroBASINS lev08 watershed · #2080338890

Bassin de Drwęca

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 3 administrative regions : Iława, Olsztyn, Ostróda

16% lakePfafstetter: 24241069

Sub-basin area

699,1km²

Upstream area

699,2km²

Discharge

5,09m³/s

Mean elev.

144m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Drwęca693 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

Ostróda
Warmińsko-Mazurskie · Poland
487.8 km²
69.5% of basin
Iława
Warmińsko-Mazurskie · Poland
134.4 km²
19.1% of basin
Olsztyn
Warmińsko-Mazurskie · Poland
79.9 km²
11.4% of basin

15 intersecting protected areas

Wzgórz Dylewskich
IUCN Not Assigned
Protected Landscape Area
86.90 km² overlap
Obszar Chronionego Krajobrazu Doliny Górnej Drwęcy
IUCN Not Assigned
Protected Landscape Area
78.01 km² overlap
Kanału Elbląskiego
IUCN Not Assigned
Protected Landscape Area
64.99 km² overlap
Dolina Drwęcy
IUCN Not Reported
Site of Community Importance (Habitats Directive)
62.38 km² overlap
Lasów Taborskich
IUCN Not Assigned
Protected Landscape Area
52.82 km² overlap
Park Krajobrazowy Wzgórz Dylewskich
IUCN V
Landscape Park
44.54 km² overlap
Dolina Dolnej Drwęcy
IUCN Not Assigned
Protected Landscape Area
42.58 km² overlap
Ostoja Dylewskie Wzgórza
IUCN Not Reported
Site of Community Importance (Habitats Directive)
25.53 km² overlap
Rzeka Drwęca
IUCN IV
Nature Reserve
10.01 km² overlap

6 more protected areassorted by overlap area

Dolina Górnej Szelążnicy
IUCN Not Assigned
Nature Reserve
1.22 km² overlap
Jeziora Mielno
IUCN Not Assigned
Protected Landscape Area
0.63 km² overlap
Jezioro Francuskie
IUCN IV
Nature Reserve
0.15 km² overlap
Jezioro Czarne
IUCN IV
Nature Reserve
0.09 km² overlap
Dylewo
IUCN IV
Nature Reserve
0.09 km² overlap
Jezioro Iłgi
IUCN IV
Nature Reserve
0.02 km² overlap

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

Species present

1 022 distinct species · 3 870 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 47 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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Drwęca : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 116 interactions GloBI sur 6 types (connectance 9.5%, filtre Serrano α=0.2). 17 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

116

Connectance

0.095

Patrimoniales

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°

7,2°C

Annual rain

640mm

Moisture idx (CMI)

-0,07

Runoff

251mm/an

PET

685mm

AET

512mm

Mean slope

1,7°

Water table

130cm

Forest

26%

Crops

46%

Urban

Protected

16%

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