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Jeziorki Ditch

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Coordinates: 52°05′43″N 20°58′38″E / 52.095278°N 20.977222°E / 52.095278; 20.977222
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Jeziorki Ditch
Jeziorki Ditch at the border of Józefosław and Julianów in Piaseczno County, view east along Cyraneczki Street
Jeziorki Ditch at the border of Józefosław and Julianów in Piaseczno County, view east along Cyraneczki Street
Map
Nickname(s)Jeziorki Canal, Zgorzała
Location
Country Poland
Physical characteristics
SourceNowa Wola, Piaseczno County
 • coordinates52°05′43″N 20°58′38″E / 52.095278°N 20.977222°E / 52.095278; 20.977222
MouthSkolimów
(Konstancin-Jeziorna)
 • coordinates
52°04′54″N 21°05′37″E / 52.081667°N 21.093611°E / 52.081667; 21.093611
Length10.3 km (6.4 mi)
Basin size21.7089 km2 (8.3819 sq mi)

Jeziorki Ditch[1] (also known as Jeziorki Canal)[2][3] is a ditch in Masovian Voivodeship, Poland, flowing through Gmina Lesznowola, Warsaw's Ursynów district, Gmina Piaseczno, and Gmina Konstancin-Jeziorna.[2] Its length is approximately 10.3 km or about 9 km, with a drainage basin of 19.6 km². The ditch serves as a tributary to the Jeziorka river, provides water retention functions, and supports a fading wildlife corridor along its banks. A trail runs along parts of the ditch for recreational use.

Location and characteristics

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The ditch is located in Poland, within the Central Mazovian Lowland [pl] (318.7), specifically the Warsaw Plain [pl] (318.76),[4] and in the natural-forest regionalization, it lies in the Kutno-Błonie Plain mesoregion of the Mazovian-Podlachian region.[5] It is a left-bank tributary of the Jeziorka river.[6]

According to the National Register of Geographical Names, the ditch's source originates in Gmina Lesznowola near the village of Nowa Wola.[7] Other sources place the origin northwest of Zgorzała Lake [pl] (or within the lake itself),[3] just beyond the tracks of Warszawa Zachodnia–Kraków Główny railway [pl],[8] near the Expressway S7 in Warsaw's Ursynów district, specifically Jeziorki area near Baletowa Street [pl].[2][6][7][9] In this version, the ditch flows southeast as an open channel. An underground section begins at the intersection of Chóralna Street and Puławska Street, running parallel to Puławska southward, then crossing it perpendicularly near Jaskółcza Street. After about 150 metres, it reverts to an open channel, passing through Dąbrówka, Gmina Piaseczno (Józefosław, Julianów, and Chyliczki), and then Gmina Konstancin-Jeziorna (Kierszek).[7] It crosses Warszawa Okęcie–Jeziorna railway [pl][8] and voivodeship road 721 (Pułaski Street).[7] The ditch empties into the Jeziorka river in Skolimów[2][9] at 8.140 km from its mouth.[10]

According to the Hydrographic Division Map of Poland, the ditch has two source sections: a longer one at Nowa Wola and a shorter one in Ursynów (Jeziorki Południowe), south of Karczunkowska Street and east of Nawłocka Street, converging just before the Pozytywka Pond [pl]. In this model, the stream north of Karczunkowska Street is an unnamed tributary. The ditch has a hydrological identifier of 25874 and a stream identifier of 167386.[11] In the River Basin Management Plan for the Vistula river basin of 2011, it is classified as a uniform surface water body with the international code PLRW20001725874.[10][12]

The ditch spans 10.3 km,[10] or about 9 km if originating in Jeziorki, with 3.0 km within Warsaw's boundaries.[2] A 2.68-km section (kilometrage: 5+390–8+070 km) is part of Warsaw's primary drainage system, with a channel bed width of 0.6–0.8 m and a depth of 1.5–2.5 m.[13]

Based on abiotic water typology, it is classified as a lowland sandy stream (type 17). Its origin is natural,[10] with water flowing intermittently, mainly after rainfall or snowmelt.[3][6]

Drainage basin

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The drainage basin is 21.7089 km² (42.57% within Warsaw)[14] or 19.6 km².[10] The area includes numerous water bodies, such as Zgorzała Lake, Pozytywka Pond, Wąsal Pond [pl], Krzewiny Pond [pl], Glinianki pod Lasem Pond [pl], Lipkowski Pond [pl], Czyste Pond [pl], Głęboki Pond [pl], and Nowe Ługi Pond [pl].[2] Tributaries include ditches RA–1 and RA–2 (also known as J–3–1 and J–3–2),[2][9] ditch R–B (J–2),[9] and collector B–4 (R–1 or J–3–3),[2][9] which runs along Warsaw's southern border, separating it from Mysiadło.[2] Near Karmazynowa Street in Dąbrówka, a branch called Stary Jeziorki Canal exists.[9] The ditch is also fed by a pre-World War II drainage network from Ursynów.[2]

The ditch flows through clay-based terrain. Some water bodies in its drainage basin, like Zgorzała and Glinianki pod Lasem, are former clay pits.[2] The Jeziorki Ditch valley features humus sands and valley bottom silt.[6] In Warsaw, it primarily passes through single-family housing areas; in Piaseczno County, the development is denser, while near the mouth in Gmina Konstancin-Jeziorna, urbanization decreases.[2]

Water retention

[edit]

Jeziorki Ditch serves a retention function, draining about 25% of Ursynów's surface area.[2] It has nine water control structures.[10] Due to clayey soil, infilling of water bodies, increasing urbanization, uncontrolled modifications to the ditch and its tributaries, variable channel cross-sections, and poorly designed culverts, significant flooding has occurred, notably in Dąbrówka in 2010[2] and repeatedly in Józefosław.[15][16][17] Consequently, Ursynów district has undertaken reclamation of water bodies in the catchment,[2] such as Czyste Pond in 2003 and Pozytywka and Wąsal Ponds in 2013.[18]

In June 2020, the Warsaw Greenery Board announced plans to build additional water control and flow regulation structures on the ditch as part of the "Warsaw Water Resources Protection Program" to mitigate climate change impacts.[19]

Ecology and water quality

[edit]

Part of the ditch flows through the Warsaw Protected Landscape Area [pl], established by the Warsaw Voivode's ordinance on 29 August 1997,[20] and the buffer zone of the Kabaty Woods.[21]

The ditch, along with adjacent ditches R–4 and R–4–2, forms a local wildlife corridor that is gradually disappearing, linked to the broader Vistula valley corridor.[6]

A green trail runs along parts of the ditch from the Warszawa Dawidy railway station to the Powsin Culture Park.[6]

A 2009 study rated the ditch's ecological status as poor, primarily due to the condition of phytoplankton. Levels of nitrogen, phosphorus, and biochemical oxygen demand (BOD5) also exceeded good status criteria.[22] In 2020, due to insufficient monitoring data, the ecological status was estimated as moderate by transferring the classification from a similar watercourse.[23]

[edit]
  • Old Jeziorki Ditch in Warsaw's Dąbrówka, near Karmazynowa Street, view from the southeast, joining a smaller local ditch
    Old Jeziorki Ditch in Warsaw's Dąbrówka, near Karmazynowa Street, view from the southeast, joining a smaller local ditch
  • Jeziorki Ditch in Józefosław, near Cyraneczki Street, view from the southeast
    Jeziorki Ditch in Józefosław, near Cyraneczki Street, view from the southeast
  • Pozytywka Pond in the Jeziorki Ditch drainage basin, reclaimed to increase retention capacity, potentially part of the ditch's course
    Pozytywka Pond in the Jeziorki Ditch drainage basin, reclaimed to increase retention capacity, potentially part of the ditch's course
  • Czyste Pond in the Jeziorki Ditch drainage basin, reclaimed to increase retention capacity
    Czyste Pond in the Jeziorki Ditch drainage basin, reclaimed to increase retention capacity

References

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  1. ^ Krauze-Tomczyk, Izabella; Ostrowski, Jerzy, eds. (2006). Nazewnictwo geograficzne Polski. Tom 1. Hydronimy. Część 1. Wody płynące, źródła, wodospady [Geographical Names of Poland. Volume 1. Hydronyms. Part 1. Flowing Waters, Springs, Waterfalls] (in Polish). Warsaw: Główny Urząd Geodezji i Kartografii. p. 99. ISBN 978-83-239-9607-1.
  2. ^ a b c d e f g h i j k l m n o Szkudlarek, Łukasz (2015). Analiza powierzchniowa zlewni. Charakterystyka i ocena funkcjonowania układu hydrograficznego, ze szczególnym uwzględnieniem systemów melioracyjnych na obszarze m.st. Warszawy wraz z zaleceniami do Studium uwarunkowań i kierunków zagospodarowania przestrzennego m.st. Warszawy i planów miejscowych [Surface Catchment Analysis: Characteristics and Evaluation of the Hydrographic System, with Particular Emphasis on Drainage Systems in Warsaw, Along with Recommendations for the Study of Conditions and Directions of Spatial Development of Warsaw and Local Plans] (PDF). architektura.um.warszawa.pl (Report) (in Polish). pp. 67–71. Archived from the original (PDF) on 22 June 2020.
  3. ^ a b c Opracowanie ekofizjograficzne do studium uwarunkowań i kierunków zagospodarowania przestrzennego m. st. Warszawy [Ecophysiographic Study for the Study of Conditions and Directions of Spatial Development of Warsaw] (PDF) (Report) (in Polish). Warsaw. 2006. pp. 27, 34. Archived from the original (PDF) on 4 March 2016.
  4. ^ Kondracki, Jerzy (2011). Geografia regionalna Polski [Regional Geography of Poland] (in Polish) (3rd ed.). Warsaw: Polish Scientific Publishers PWN. pp. 312–324. ISBN 978-83-01-16022-7.
  5. ^ Zielony, Roman; Kliczkowska, Alina (2012). Regionalizacja przyrodniczo-leśna Polski 2010 [Natural-Forest Regionalization of Poland 2010] (in Polish). Warsaw: Centrum Informacyjne Lasów Państwowych. ISBN 978-83-61633-62-4. Archived from the original on 7 November 2016.
  6. ^ a b c d e f Fronczyk, Dorota; Gralewska, Paulina (March 2014). Prognoza Oddziaływania na Środowisko do Projektu Miejscowego Planu Zagospodarowania Przestrzennego Zachodniego Pasma Pyrskiego w Rejonie ul. Sarabandy [Environmental Impact Assessment for the Draft Local Spatial Development Plan of the Western Pyrskie Belt in the Sarabandy Street Area] (PDF) (Report) (in Polish). Warsaw. pp. 5, 13–18, 28. Archived from the original (PDF) on 11 September 2021.
  7. ^ a b c d "Geoportal Krajowy" [National Geoportal]. mapy.geoportal.gov.pl (in Polish). Retrieved 10 June 2025.
  8. ^ a b "Mapa Interaktywna Linii Kolejowych" [Interactive Map of Railway Lines]. mapa.plk-sa.pl (in Polish). Retrieved 10 June 2025.
  9. ^ a b c d e f "Inwentaryzacja urządzeń wodnych na terenie dzielnicy Ursynów m.st. Warszawy" - KZP-XII-WZP.271.19.2013. zał. nr 6a do SIWZ - Mapa (w skali 1:10000) z naniesionym przebiegiem rowów i położeniem zbiorników wodnych [Inventory of Water Facilities in the Ursynów District of Warsaw - KZP-XII-WZP.271.19.2013. Annex No. 6a to SIWZ - Map (1:10,000 Scale) with the Course of Ditches and Location of Water Bodies] (Report) (in Polish). 27 March 2013. Archived from the original on 6 June 2020. Retrieved 10 June 2025.
  10. ^ a b c d e f Opracowanie warunków korzystania z wód zlewni Jeziorki wraz z opracowaniem strategicznej oceny oddziaływania na środowisko [Development of Conditions for the Use of Waters in the Jeziorka Catchment with a Strategic Environmental Impact Assessment] (PDF) (Report) (in Polish). Warsaw. August 2012. pp. 13, 28–29, 31–32. Archived from the original (PDF) on 1 August 2021.
  11. ^ Mapa Podziału Hydrograficznego Polski w skali 1:10 000 [Hydrographic Division Map of Poland at 1:10,000 Scale] (Report) (in Polish). 2014.
  12. ^ "Plan gospodarowania wodami na obszarze dorzecza Wisły" [Water Management Plan for the Vistula River Basin District]. Monitor Polski (in Polish). 49 (549). 2011.
  13. ^ Program Ochrony Środowiska dla Miasta Stołecznego Warszawy na lata 2009–2012 z uwzględnieniem perspektywy do 2016 r. [Environmental Protection Program for the City of Warsaw for 2009–2012 with a Perspective to 2016] (PDF) (Report) (in Polish). Warsaw. November 2009. p. 36. Archived from the original (PDF) on 18 April 2021.
  14. ^ Szkudlarek, Łukasz (2015). Analizy ogólne. Charakterystyka i ocena funkcjonowania układu hydrograficznego, ze szczególnym uwzględnieniem systemów melioracyjnych na obszarze m.st. Warszawy wraz z zaleceniami do Studium uwarunkowań i kierunków zagospodarowania przestrzennego m.st. Warszawy i planów miejscowych [General Analyses: Characteristics and Evaluation of the Hydrographic System, with Particular Emphasis on Drainage Systems in Warsaw, Along with Recommendations for the Study of Conditions and Directions of Spatial Development of Warsaw and Local Plans] (PDF) (Report) (in Polish). p. 5. Archived from the original (PDF) on 24 June 2021.
  15. ^ "Toną ulice, posesje zmieniają się w jeziora" [Streets Are Flooding, Properties Are Turning into Lakes]. piasecznonews.pl (in Polish). 20 June 2020. Archived from the original on 1 September 2020.
  16. ^ Rybarczyk, Robert (16 July 2011). "Gdzie ta woda ma ujść?" [Where Is This Water Supposed to Go?]. Życie Warszawy (in Polish).
  17. ^ Grela, Joanna (5 June 2019). "Na Geodetów poczekamy" [We'll Have to Wait for Surveyors]. przegladpiaseczynski.pl (in Polish). Archived from the original on 26 September 2020.
  18. ^ "Zakończyła się rekultywacja kolejnych stawów na Zielonym Ursynowie" [Reclamation of Additional Ponds in Green Ursynów Completed]. ursynow.pl (in Polish). 16 March 2015. Archived from the original on 4 January 2014.
  19. ^ "To nie przelewki – spiętrzamy wodę w warszawskich kanałach" [It’s No Joke – We're Retaining Water in Warsaw's Channels]. zzw.waw.pl (in Polish). 19 June 2020. Retrieved 10 June 2025.
  20. ^ "Warszawski obszar chronionego krajobrazu" [Warsaw Protected Landscape Area]. crfop.gdos.gov.pl (in Polish). Retrieved 10 June 2025.
  21. ^ "Rezerwat przyrody Las Kabacki" [Las Kabacki Nature Reserve]. crfop.gdos.gov.pl (in Polish). Retrieved 10 June 2025.
  22. ^ "Monitoring rzek w 2009 roku" [River Monitoring in 2009]. wios.warszawa.pl (in Polish). 2010. Archived from the original on 9 August 2012.
  23. ^ "Ocena stanu jednolitych części wód rzek i zbiorników zaporowych w latach 2014-2019 metodą przeniesienia - tabela" [Assessment of the Status of Uniform River and Reservoir Water Bodies in 2014–2019 Using the Transfer Method - Table]. gios.gov.pl (in Polish). 2020. Retrieved 10 June 2025.
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