HydroBASINS lev08 watershed · #2080344080

Bassin de Gwda

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 4 administrative regions : Chojnice, Człuchów, Szczecinek, Złotów

8% lakePfafstetter: 24224047

Sub-basin area

949,4km²

Upstream area

1 961km²

Discharge

12,32m³/s

Mean elev.

143m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Rurzyca121 km²

▲ Receives from 2 basins

Bassin de Gwda519 km²
Bassin de Czernica492 km²

4 dept-equivalent regions (GADM L2)

Złotów
Wielkopolskie · Poland
515.5 km²
54.1% of basin
Człuchów
Pomorskie · Poland
428.6 km²
45.0% of basin
Szczecinek
Zachodniopomorskie · Poland
9.1 km²
1.0% of basin
Chojnice
Pomorskie · Poland
0.2 km²
0.0% of basin

13 intersecting protected areas

Pojezierze Wałeckie i Dolina Gwdy (woj. wielkopolskie)
IUCN Not Assigned
Protected Landscape Area
194.45 km² overlap
Puszcza nad Gwdą
IUCN Not Reported
Special Protection Area (Birds Directive)
19.00 km² overlap
Obszar Chronionego Krajobrazu Doliny Rzeki Debrzynki
IUCN Not Assigned
Protected Landscape Area
15.67 km² overlap
Poligon w Okonku
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
15.06 km² overlap
Dolina Debrzynki
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
12.96 km² overlap
Jezior Człuchowskich
IUCN Not Assigned
Protected Landscape Area
6.71 km² overlap
Dolina Gwdy
IUCN IV
Nature Reserve
4.03 km² overlap
Dolina Szczyry
IUCN Not Reported
Site of Community Importance (Habitats Directive)
3.47 km² overlap
Uroczysko Jary
IUCN IV
Nature Reserve
0.27 km² overlap

4 more protected areassorted by overlap area

Zaborski Park Krajobrazowy
IUCN V
Landscape Park
0.18 km² overlap
Las Wolność
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
0.18 km² overlap
Miłachowo
IUCN IV
Nature Reserve
0.04 km² overlap
Kozie Brody
IUCN IV
Nature Reserve
0.01 km² overlap

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

Species present

1 660 distinct species · 6 555 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 45 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 Gwda : 36 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 117 interactions GloBI sur 6 types (connectance 11.8%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

117

Connectance

0.118

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

622mm

Moisture idx (CMI)

-0,08

Runoff

189mm/an

PET

676mm

AET

502mm

Mean slope

1,3°

Water table

137cm

Forest

38%

Crops

43%

Urban

Protected

21%

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