Przestrzenne i sezonowe zróżnicowanie wybranych parametrów jakości wody w zlewni zurbanizowanej na przykładzie Potoku Służewieckiego = Spatial and seasonal variability of selected water-quality parameters in an urbanised catchment as exemplified by Warsaw’s Służewiecki Stream

Halaś, Agnieszka; Czarnecka, Kaja; Piasecki, Krzysztof; Łaszewski, Maksym

doi:10.7163/przg.2019.1.6

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Znacznie częściej poruszanymi tematami w artykułach publikowanych w Polsce, koncentrującymi się na rzekach obszarów zurbanizowanych, są: wpływ klimatu na zmiany reżimu hydrologicznego (Wrzesiński, 2010), właściwości termiczne wód rzecznych (Bartnik, 2017;Halaś et al, 2019) oraz topoklimat roślinnych zbiorowisk nadwiślańskich w pobliżu miasta (Kowalska et al, 2019).…”

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Ogólna charakterystyka termiczna doliny Wisły w obszarze Warszawy = A general thermal characterisation of the Vistula Valley in Warsaw

Kuchcik,

Czarnecka

2023

Prz. Geogr.

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Rivers flowing through cities and their valleys serve many functions, having also a special role in the amelioration of the urban climate. Within the city limits of Poland’s capital city, Warsaw, the River Vistula flows over a distance of 31.5 km, in a valley of maximum width 2 km. The river is regulated and enclosed within flood embankments. Its left bank, in the districts of Śródmieście and Żoliborz especially, is high and partly built over with boulevards; while the right bank is low and natural, with sandy beaches and walking and cycling paths. Despite the long-term transformation, the Vistula Valley still has an extremely valuable role in the natural system. Most of it enjoys Natura 2000 protection (from the points of view of flora, fauna and the Valley itself). While the Vistula Valley in Warsaw certainly constitutes the city’s main and most effective area of ventilation and air regeneration, knowledge of its thermal conditions remains scant. That is somewhat paradoxical, given worldwide study of urban climate since the 1830s, with considerable urban-focused interest among Polish climatologists also not leading to much elucidation of the river-valley climate within the city. Through the work carried out it proved possible to demonstrate differences in the thermal regime in Warsaw’s Vistula Valley, depending on the location and the immediate vicinity of the studied point. The amplitude in average daily air temperature is lower where density of buildings is greater, and where the ratio for the presence of biologically active areas is lower. The northern and southern parts of the Valley in Warsaw are characterised by similar thermal conditions, while the downtown part differs clearly from these places, being much warmer, but also much more likely to play host to the “cold spot” phenomenon.

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Ogólna charakterystyka termiczna doliny Wisły w obszarze Warszawy = A general thermal characterisation of the Vistula Valley in Warsaw

Kuchcik,

Czarnecka

2023

Prz. Geogr.

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Combined Effect of Climate and Anthropopressure on River Water Quality

Wieczorek

Turek

Wolf

2023

IJERPH

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This study was a continuation of our investigation of the spatio-temporal variability of the Bzura River’s water chemistry. Our research is of particular importance in the context of the recent ecological disaster on the Oder River and concerns the international problem of surface water contamination. The study area was a 120 km section of the Bzura River. We tested more measurement points and with a higher sampling frequency than those used in the national monitoring of river water quality. During two hydrological years, 360 water samples were collected. The selected parameters: electrical conductivity, temperature, dissolved oxygen, dissolved organic carbon, nitrates, phosphates, bicarbonates, chlorides, sodium, potassium, calcium, and magnesium were determined. Numerous results exceeded the Polish threshold limits. Spatio-temporal variability and water quality were assessed using principal component analysis (PCA), cluster analysis (CA), and water quality index (WQI) approaches. Many point sources of pollution related to urbanization, agriculture, and industry were detected. Moreover, due to the changing climatic conditions, a significant difference between temporal variability in both years was observed. Our results indicated that it is necessary to increase the number of measurement stations for surface water monitoring; it will allow for a faster detection of the threat.

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Sezonowe zróżnicowanie temperatury wody na przykładzie wybranych rzek nizinnych Mazowsza = Seasonal differentiation of water temperature on the example of lowland Mazovian rivers

Łaszewski¹

2020

Prz. Geogr.

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Thermal regime has a critical impact on the lotic environment, as maximum temperature determines the boundaries of the occurrence of aquatic species, seasonal and diurnal water temperature variations affect their bioenergetics, while the timing of specific water temperature values during the year is important in the context of spawning and migrations. However, despite the great importance of water temperature studies in the context of environmental management and fisheries, as well as the development of accurate measurement techniques, such investigations have received relatively limited attention in Poland. The current study attempted to examine the seasonal differentiation of water temperature in lowland rivers. For this purpose, water temperature was recorded from the 1st of May 2015 to the 30th of April 2019 with a temporal resolution of 30-minutes. Digital temperature reorders used to make the measurements were distributed across six sites in Jeziorka, Świder and Utrata catchments located on the Mazovian Lowland and the Southern Podlachia Lowland near Warsaw. The hydrometeorological background of the water temperature monitoring was determined on the basis of data from the Warszawa-Okęcie station and water gauging stations. On the basis of the measurement data, mean, maximum, and minimum monthly water temperatures were calculated and presented on the background of the appropriate air temperature data, while statistical distribution of the 30-minute water temperature, aggregated in a monthly timescale, was presented on the box and whiskers plots. The Ward method was used to group months similar in terms of their thermal conditions, while the Pearson correlation coefficient was applied to evaluate the strength of the relationship between water and air temperature. The results indicate that the seasonal course of water temperature follows the course of air temperature, with the highest mean monthly water temperatures recorded in July, while the lowest in January. Statistical distribution analysis of water temperature in individual months and its grouping by the Ward method allowed to identify two periods characterized by relatively stable thermal conditions and two periods of dynamic changes of water temperature. In contrast to the maximum values of water temperature, which were observed in the summer as a result of intensive solar radiation and low streamflow rates, the greatest variability of water temperature, as indicated by reference to mean daily range and standard deviation, was found in the spring months, i.e. in April and May, while the lowest in winter, from December to February. The relationship between daily mean water temperature and air temperature, established with the use of the Pearson correlation coefficient on a monthly basis, was clearly stronger during the spring increase and the autumn fall of the water temperature, which can be linked with greater vulnerability to atmospheric heat fluxes. A definitely weaker relationship was found in the winter and summer months, when greater importance can be attached to other drivers of stream temperature, like the presence of ice cover, cloudiness, riparian shading, and groundwater inflows.

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Przestrzenne i sezonowe zróżnicowanie wybranych parametrów jakości wody w zlewni zurbanizowanej na przykładzie Potoku Służewieckiego = Spatial and seasonal variability of selected water-quality parameters in an urbanised catchment as exemplified by Warsaw’s Służewiecki Stream

Cited by 3 publications

References 16 publications

Ogólna charakterystyka termiczna doliny Wisły w obszarze Warszawy = A general thermal characterisation of the Vistula Valley in Warsaw

Ogólna charakterystyka termiczna doliny Wisły w obszarze Warszawy = A general thermal characterisation of the Vistula Valley in Warsaw

Combined Effect of Climate and Anthropopressure on River Water Quality

Sezonowe zróżnicowanie temperatury wody na przykładzie wybranych rzek nizinnych Mazowsza = Seasonal differentiation of water temperature on the example of lowland Mazovian rivers

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