HydroBASINS lev08 watershed · #2080344930

Bassin de Pisa

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 5 administrative regions : Kolno, Ostrołęka, Pisz, Szczytno, Łomża

7% lakePfafstetter: 24248063

Sub-basin area

974,3km²

Upstream area

3 907,5km²

Discharge

22,5m³/s

Mean elev.

126m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Skroda17 km²

▲ Receives from 2 basins

Bassin de Święcek399 km²
Bassin de Kanał Jegliński89 km²

5 dept-equivalent regions (GADM L2)

Pisz
Warmińsko-Mazurskie · Poland
451.7 km²
46.2% of basin
Kolno
Podlaskie · Poland
357.2 km²
36.5% of basin
Ostrołęka
Mazowieckie · Poland
112.7 km²
11.5% of basin
Łomża
Podlaskie · Poland
39.1 km²
4.0% of basin
Szczytno
Warmińsko-Mazurskie · Poland
17.6 km²
1.8% of basin

14 intersecting protected areas

Puszcza Piska
IUCN Not Reported
Special Protection Area (Birds Directive)
290.65 km² overlap
Równiny Kurpiowskiej i Doliny Dolnej Narwi
IUCN Not Assigned
Protected Landscape Area
212.17 km² overlap
Puszczy i Jezior Piskich
IUCN Not Assigned
Protected Landscape Area
162.03 km² overlap
Ostoja Piska
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
45.77 km² overlap
Dolina Pisy
IUCN Not Reported
Site of Community Importance (Habitats Directive)
27.50 km² overlap
Myszynieckie Bory Sasankowe
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
14.79 km² overlap
Mokradła Kolneńskie i Kurpiowskie
IUCN Not Reported
Site of Community Importance (Habitats Directive)
10.38 km² overlap
Jezioro Pogubie Wielkie
IUCN IV
Nature Reserve
7.16 km² overlap
Torfowisko Serafin
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
3.70 km² overlap

5 more protected areassorted by overlap area

Torfowisko Serafin
IUCN IV
Nature Reserve
1.85 km² overlap
Ciemny Kąt
IUCN IV
Nature Reserve
1.26 km² overlap
Spychowski
IUCN Not Assigned
Protected Landscape Area
0.55 km² overlap
Łokieć
IUCN IV
Nature Reserve
0.21 km² overlap
Tabory
IUCN IV
Nature Reserve
0.17 km² overlap

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

Species present

1 080 distinct species · 8 896 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 29 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 Pisa : 19 espèces reliées par 70 interactions GloBI sur 4 types (connectance 16.1%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.161

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°

6,9°C

Annual rain

599mm

Moisture idx (CMI)

-0,15

Runoff

171mm/an

PET

706mm

AET

502mm

Mean slope

1,0°

Water table

108cm

Forest

32%

Crops

30%

Urban

Protected

23%

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