HydroBASINS lev08 watershed · #2080026240
Bassin de Polnica
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 : Koszalin, Koszalin (City), Kołobrzeg, Sławno
Sub-basin area
736,7km²
Upstream area
736,7km²
Discharge
0,21m³/s
Mean elev.
32m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 529.2 km²71.5% of basin
- Kołobrzeg70.9 km²9.6% of basin
- 64.2 km²8.7% of basin
- Sławno61.1 km²8.3% of basin
19 intersecting protected areas
Koszaliński Pas Nadmorski
IUCN Not AssignedProtected Landscape Area
301.24 km² overlap
Jezioro Bukowo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
32.65 km² overlap
Trzebiatowsko-Kołobrzeski Pas Nadmorski
IUCN Not ReportedSite of Community Importance (Habitats Directive)
27.58 km² overlap
Zatoka Pomorska
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.03 km² overlap
Zatoka Pomorska
IUCN Not ReportedBaltic Sea Protected Area (HELCOM)
11.02 km² overlap
Bukowy Las Górki
IUCN Not ReportedSite of Community Importance (Habitats Directive)
9.65 km² overlap
Warnie Bagno
IUCN Not ReportedSite of Community Importance (Habitats Directive)
4.76 km² overlap
Przybrzeżne wody Bałtyku
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.48 km² overlap
Przybrzezne Wody Baltyku
IUCN Not ReportedBaltic Sea Protected Area (HELCOM)
3.48 km² overlap
10 more protected areassorted by overlap area
Łazy
IUCN IVNature Reserve
2.65 km² overlap
Warnie Bagno
IUCN IVNature Reserve
2.25 km² overlap
Dolina Bielawy
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.10 km² overlap
Wierzchomińskie Bagno
IUCN IVNature Reserve
0.44 km² overlap
Dolina Radwi, Chocieli i Chotli
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.31 km² overlap
Sieciemińskie Rosiczki
IUCN IVNature Reserve
0.12 km² overlap
Rekowski Wrzosiec
IUCN Not AssignedNature Reserve
0.08 km² overlap
Jodły Karnieszewickie
IUCN IVNature Reserve
0.05 km² overlap
Bielica
IUCN IVNature Reserve
0.01 km² overlap
Dolina Wieprzy i Studnicy
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 566 distinct species · 23 460 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Polnica : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 129 interactions GloBI sur 6 types (connectance 18.3%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
8,2°C
Annual rain
663mm
Moisture idx (CMI)
0,02
Runoff
385mm/an
PET
648mm
AET
498mm
Mean slope
1,1°
Water table
97cm
Forest
29%
Crops
49%
Urban
3%
Protected
41%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)