HydroBASINS lev08 watershed · #2080328520

Bassin de Drężnianka

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 2 administrative regions : Koszalin, Szczecinek

13% lakePfafstetter: 24230046

Sub-basin area

180,4km²

Upstream area

180,4km²

Discharge

1,96m³/s

Mean elev.

136m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Radew339 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

Koszalin
Zachodniopomorskie · Poland
174.5 km²
96.3% of basin
Szczecinek
Zachodniopomorskie · Poland
6.6 km²
3.7% of basin

9 intersecting protected areas

Dolina Radwi, Chocieli i Chotli
IUCN Not Reported
Site of Community Importance (Habitats Directive)
84.41 km² overlap
Okolice Żydowo-Biały Bór
IUCN Not Assigned
Protected Landscape Area
47.12 km² overlap
Bobolickie Jeziora Lobeliowe
IUCN Not Reported
Site of Community Importance (Habitats Directive)
10.59 km² overlap
Jezioro Bobięcińskie
IUCN Not Reported
Site of Community Importance (Habitats Directive)
6.93 km² overlap
Ostoja Drawska
IUCN Not Reported
Special Protection Area (Birds Directive)
6.63 km² overlap
Dolina Grabowej
IUCN Not Reported
Site of Community Importance (Habitats Directive)
2.06 km² overlap
Dolina Zgniłej Strugi
IUCN Not Assigned
Nature Reserve
1.49 km² overlap
Wapienny Las
IUCN Not Assigned
Nature Reserve
0.22 km² overlap
Buczyna
IUCN IV
Nature Reserve
0.04 km² overlap

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

Species present

544 distinct species · 2 596 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 31 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 Drężnianka : 30 espèces reliées par 24 interactions GloBI sur 3 types (connectance 5.2%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.052

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°

7,4°C

Annual rain

673mm

Moisture idx (CMI)

0,03

Runoff

333mm/an

PET

650mm

AET

501mm

Mean slope

2,3°

Water table

184cm

Forest

35%

Crops

24%

Urban

Protected

26%

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