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Prof. Mariusz Sojka
Department of Land Improvement, Environmental Development and Spatial Management, Poznań University of Life Sciences, 60-624 Poznań, Poland

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0 Climate Change
0 GIS
0 Remote Sensing
0 Water Chemistry
0 Agricultural water management

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Journal article
Published: 29 June 2021 in Sustainability
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The historical effects of land development on water management currently require a new approach, in many cases involving attempts at the restoration of the quasi-natural state. This is evident in reference to many regions in Poland, where the hydrographic network has been diminishing over the centuries, among others in favour of obtaining new agricultural land. Such activities overlap with natural processes causing transformations of the hydrosphere. The most serious problems currently include water deficits resulting from climate change and human activity. This paper employed archival bathymetric maps from the beginning of the 20th century for the determination of the scale of changes in the morphometric parameters of six lakes in western Poland. It was determined that over a period of more than a hundred years, the surface area (12.2%) and original volume of water bodies (13.9%) were largely reduced. This situation was caused by both natural (overgrowing and shallowing) and anthropogenic (change in water level) factors. The obtained information points to the need of an inventory of historical bathymetric maps of lakes. In combination with modern research, this will allow for the determination of changes in the water resources of lakes and, in a longer-term perspective, potential possibilities of their renaturisation. This knowledge is important in the context of the reconstruction of water resources in the territory of Poland, where their deficits are recorded increasingly frequently. It should also be emphasised that the restoration of the natural capacity of water retention in lakes is a more economical solution and, most importantly, it is not invasive for the environment.

ACS Style

Mariusz Ptak; Adam Choiński; Mariusz Sojka; Senlin Zhu. Changes in the Water Resources of Selected Lakes in Poland in the Period 1916–2020 as Information to Increase Their Availability. Sustainability 2021, 13, 7298 .

AMA Style

Mariusz Ptak, Adam Choiński, Mariusz Sojka, Senlin Zhu. Changes in the Water Resources of Selected Lakes in Poland in the Period 1916–2020 as Information to Increase Their Availability. Sustainability. 2021; 13 (13):7298.

Chicago/Turabian Style

Mariusz Ptak; Adam Choiński; Mariusz Sojka; Senlin Zhu. 2021. "Changes in the Water Resources of Selected Lakes in Poland in the Period 1916–2020 as Information to Increase Their Availability." Sustainability 13, no. 13: 7298.

Research article
Published: 26 April 2021 in Hydrological Sciences Journal
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The study presents changes in the elements of the hydrological regime of Lake Hańcza in the period 1960–2019, including water temperature, ice cover characteristics and water level. It was determined that statistically significant changes resulted in an increase in water temperature (0.11°C·dec−1), a decrease in maximum ice thickness (5 cm·dec−1) and an increase in water levels (6.7 cm·dec−1). Changes in water temperature and ice cover in the analysed case are different from those in other lakes of the region. As the tests conducted in this study and in previous research have shown, the lake has resisted global warming for a relatively long time, and the change in thermal conditions occurred a decade later than in other lakes in this part of Europe. The analysed case leads to the conclusion that the morphometric features of lakes significantly modify the influence of overriding factors, such as climate conditions.

ACS Style

Mariusz Ptak; Mariusz Sojka. Different responses to climate change of the hydrological regime of Lake Hańcza, the deepest lake in the Central European Plain. Hydrological Sciences Journal 2021, 66, 1083 -1095.

AMA Style

Mariusz Ptak, Mariusz Sojka. Different responses to climate change of the hydrological regime of Lake Hańcza, the deepest lake in the Central European Plain. Hydrological Sciences Journal. 2021; 66 (6):1083-1095.

Chicago/Turabian Style

Mariusz Ptak; Mariusz Sojka. 2021. "Different responses to climate change of the hydrological regime of Lake Hańcza, the deepest lake in the Central European Plain." Hydrological Sciences Journal 66, no. 6: 1083-1095.

Journal article
Published: 21 March 2021 in Minerals
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Pollution of river bottom sediments with heavy metals (HMs) has emerged as a main environmental issue related to intensive anthropopressure on the water environment. In this context, the risk of harmful effects of the HMs presence in the bottom sediments of the Warta River, the third longest river in Poland, has been assessed. The concentrations of Cr, Ni, Cu, Zn, Cd, and Pb in the river bottom sediments collected at 24 sample collection stations along the whole river length have been measured and analyzed. Moreover, in the GIS environment, a method predicting variation of HMs concentrations along the whole river length, not at particular sites, has been proposed. Analysis of the Warta River bottom sediment pollution with heavy metals in terms of the indices: the Geoaccumulation Index (Igeo), Enrichment Factor (EF), Pollution Load Index (PLI), and Metal Pollution Index (MPI), has proved that, in 2016, the pollution was heavier than in 2017. Assessment of the potential toxic effects of HMs accumulated in bottom sediments, made on the basis of Threshold Effect Concentration (TEC), Midpoint Effect Concentration (MEC), and Probable Effect Concentration (PEC) values, and the Toxic Risk Index (TRI), has shown that the ecological hazard in 2017 was much lower. Cluster analysis revealed two main groups of sample collection stations at which bottom sediments showed similar chemical properties. Changes in classification of particular sample collection stations into the two groups analyzed over a period of two subsequent years indicated that the main impact on the concentrations of HMs could have their point sources in urbanized areas and river fluvial process.

ACS Style

Joanna Jaskuła; Mariusz Sojka; Michał Fiedler; Rafał Wróżyński. Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland. Minerals 2021, 11, 327 .

AMA Style

Joanna Jaskuła, Mariusz Sojka, Michał Fiedler, Rafał Wróżyński. Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland. Minerals. 2021; 11 (3):327.

Chicago/Turabian Style

Joanna Jaskuła; Mariusz Sojka; Michał Fiedler; Rafał Wróżyński. 2021. "Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland." Minerals 11, no. 3: 327.

Regular paper
Published: 13 March 2021 in The Geographical Journal
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The paper presents changes in the ice regime of lakes located in northern part of Poland. It was established that in the period of 1960‐2019, there was a successive decline of the lakes ice extent, clearly visible in individual parameters; formation of the ice cover is delayed by 3.0 days∙dec‐1 (on average for all lakes), its decline occurred earlier by 3.8 day·dec‐1, and the length of the ice cover is shorter by 6.8 day·dec‐1. Moreover, the maximum thickness of the ice cover is becoming thinner, and this process has progressed at an average rate of 2.3 cm∙dec‐1. The aforementioned situation shows strong relations with air temperature. It is particularly evident in the late 1980s, when a change in the thermal regime took place, which was documented in most of the analysed parameters, as demonstrated in the study. It was established that from that period up to now, the decline of the ice cover tend to start 19 days earlier, the duration of the ice cover is shorter by 22 days, and the ice cover is 8 cm thinner, on average. The observed transformation affects the imbalance of the existing equilibrium in the lakes, which can be related to both biotic and abiotic processes.

ACS Style

Mariusz Ptak; Mariusz Sojka. The disappearance of ice cover on temperate lakes (Central Europe) as a result of climate warming. The Geographical Journal 2021, 187, 200 -213.

AMA Style

Mariusz Ptak, Mariusz Sojka. The disappearance of ice cover on temperate lakes (Central Europe) as a result of climate warming. The Geographical Journal. 2021; 187 (3):200-213.

Chicago/Turabian Style

Mariusz Ptak; Mariusz Sojka. 2021. "The disappearance of ice cover on temperate lakes (Central Europe) as a result of climate warming." The Geographical Journal 187, no. 3: 200-213.

Journal article
Published: 15 February 2021 in Journal of Hydrology: Regional Studies
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The study region comprises 25 lowland Polish lakes in the northern part of the country. The studied lakes provide domestic, industrial and agricultural water supply, and are major attractions for tourism, thus playing a significant role in the Polish economy. The expected impact of future climate change on lake surface water temperature (LSWT) was predicted using the air2water model, which relies solely on daily air temperature (AT) as model input. LSWT and AT observations for the period 1987–2016 were used for model calibration and validation. Then, historical (1987–2005) and future (2006–2100) AT time series from nine EURO-CORDEX climate models were used to project future LSWT under emission scenarios RCP4.5 and RCP8.5. The results showed that air2water can well reproduce daily LWST with root mean square errors lower than 1 °C on average. The warming trends of both AT and LSWT are expected to be lower than those observed in the past decades (after the 1980s), and ice cover and weak stratification conditions are expected to partially buffer the LSWT response to the high AT warming expected in future winters. However, the overall enduring warming will substantially alter future thermal dynamics, leading to a shortening of ice cover and inverse stratification periods, possibly leading to serious consequences for lake water quality and ecosystem health.

ACS Style

Sebastiano Piccolroaz; Senlin Zhu; Mariusz Ptak; Mariusz Sojka; Xinzhong Du. Warming of lowland Polish lakes under future climate change scenarios and consequences for ice cover and mixing dynamics. Journal of Hydrology: Regional Studies 2021, 34, 100780 .

AMA Style

Sebastiano Piccolroaz, Senlin Zhu, Mariusz Ptak, Mariusz Sojka, Xinzhong Du. Warming of lowland Polish lakes under future climate change scenarios and consequences for ice cover and mixing dynamics. Journal of Hydrology: Regional Studies. 2021; 34 ():100780.

Chicago/Turabian Style

Sebastiano Piccolroaz; Senlin Zhu; Mariusz Ptak; Mariusz Sojka; Xinzhong Du. 2021. "Warming of lowland Polish lakes under future climate change scenarios and consequences for ice cover and mixing dynamics." Journal of Hydrology: Regional Studies 34, no. : 100780.

Journal article
Published: 08 January 2021 in Scientific Reports
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The objective of this study was to analyse spatial variability of the trace elements (TEs) and rare earth elements (REEs) concentration in lake bottom sediments in Bory Tucholskie National Park (BTNP); Poland. The following research questions were posed: which factors have a fundamental impact on the concentration and spatial variability of elements in bottom sediments, which of the elements can be considered as indicators of natural processes and which are related to anthropogenic sources. The research material was sediments samples collected from 19 lakes. The concentrations of 24 TEs and 14 REEs were determined. The analyses were carried out using the inductively coupled plasma mass spectrometry (ICP-QQQ). Cluster analysis and principal component analysis were used to determine the spatial variability of the TEs and REEs concentrations, indicate the elements that are the indicators of natural processes and identify potential anthropogenic sources of pollution. The geochemical background value (GBV) calculations were made using 13 different statistical methods. However, the contamination of bottom sediments was evaluated by means of the index of geo-accumulation, the enrichment factor, the pollution load index, and the metal pollution index. The BTNP area is unique because of its isolation from the inflow of pollutants from anthropogenic sources and a very stable land use structure over the last 200 years. This study shows high variability of TE and REE concentrations in lake sediments. The values of geochemical indices suggest low pollution of lakes bottom sediments. It was found that TEs originated mainly from geogenic sources. However, the concentrations of Li, Ni, Sc, Se, Be, Se, Ag, Re, Tl, Cd, Sb and U may be related to the impact of point sources found mainly in the Ostrowite Lake. Almost all REEs concentrations were strongly correlated and their presence was linked to with geochemical processes. The elements allowing to identify natural processes and anthropogenic pollution sources were Cr, Co, Cu, Ag, Cd, Zn, Bi, Re, Ba, Al and Rb in TEs group and Nd, Gd, Yb, Lu, Eu, Dy and Ce in REEs group. The analysis shows high spatial variability of TE and REE concentrations in lake sediments. The values of geochemical indices point to low pollution of lakes sediments. The anthropogenic sources only for two lakes had an impact on concentrations of selected TEs and REEs. The analyses allowed to identify elements among TEs and REEs documenting geochemical processes and those indicating anthropogenic sources of pollution.

ACS Style

Mariusz Sojka; Adam Choiński; Mariusz Ptak; Marcin Siepak. Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland. Scientific Reports 2021, 11, 1 -18.

AMA Style

Mariusz Sojka, Adam Choiński, Mariusz Ptak, Marcin Siepak. Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland. Scientific Reports. 2021; 11 (1):1-18.

Chicago/Turabian Style

Mariusz Sojka; Adam Choiński; Mariusz Ptak; Marcin Siepak. 2021. "Causes of variations of trace and rare earth elements concentration in lakes bottom sediments in the Bory Tucholskie National Park, Poland." Scientific Reports 11, no. 1: 1-18.

Journal article
Published: 04 November 2020 in Journal of Hydrology
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Northern Hemisphere lakes are losing their ice cover due to climate change. Here we explored six decades of observational data (1961–2017) showing trends in air temperature, wind speed and precipitation over northern Poland, as well as changes in the ice conditions for five lakes with different morphometry. We evaluated whether and to what extent climatic effects, including atmospheric warming, changing wind speed and rainfall during fall and winter, influence ice conditions in morphometrically different lakes in Northern Poland. Our analysis demonstrated that ice cover duration and thickness decreased at rates of 5.4 days decade−1 and 2.5 cm decade−1, respectively. Ice conditions were influenced (65–75%) by the direct effects of air temperature change and to some extent by an interaction of warming with wind speed and precipitation (5–10%). While stronger autumnal winds result in longer ice cover duration, the effect of precipitation is bimodal with either an enhancement of ice formation by autumnal rain or accelerated ice loss during spring. To project future changes in ice conditions, we used a 1D hydrodynamic lake model forced with four climate model projections under low, medium and high Representative Concentration Pathway (RCP) scenarios. Our simulations demonstrate that current ice conditions will stabilize under the low emission scenario (RCP 2.6) but decrease under both the medium and high emission scenarios (RCP 6.0 and 8.5). During the 21st century, the lakes are projected to lose their ice at a rate between 4.5- and 10-days decade−1 and ice thickness will decrease by between 3.0 and 5.0 cm decade−1. The rate of change will be greater in smaller rather than larger lakes and more so for those situated further inland. The probability of ice-free winters will increase for all lakes and among all future scenarios by between 4 and 69% with the highest potential frequency of ice-free winters in smaller and deeper but relatively wind-exposed lakes.

ACS Style

Maciej Bartosiewicz; Mariusz Ptak; R. Iestyn Woolway; Mariusz Sojka. On thinning ice: Effects of atmospheric warming, changes in wind speed and rainfall on ice conditions in temperate lakes (Northern Poland). Journal of Hydrology 2020, 597, 125724 .

AMA Style

Maciej Bartosiewicz, Mariusz Ptak, R. Iestyn Woolway, Mariusz Sojka. On thinning ice: Effects of atmospheric warming, changes in wind speed and rainfall on ice conditions in temperate lakes (Northern Poland). Journal of Hydrology. 2020; 597 ():125724.

Chicago/Turabian Style

Maciej Bartosiewicz; Mariusz Ptak; R. Iestyn Woolway; Mariusz Sojka. 2020. "On thinning ice: Effects of atmospheric warming, changes in wind speed and rainfall on ice conditions in temperate lakes (Northern Poland)." Journal of Hydrology 597, no. : 125724.

Journal article
Published: 10 August 2020 in Journal of Hydrology and Hydromechanics
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Lake Śniardwy is the largest among more than 7000 Polish lakes. So far, it has not been a subject of detailed investigations concerning long-term changes in water temperature or ice regime. A considerable change in thermal and ice conditions has been observed in the period 1972–2019. Mean annual water temperature increased by 0.44°C dec−1 on average, and was higher than an increase in air temperature (0.33°C dec−1). In the monthly cycle, the most dynamic changes occurred in April (0.77°C dec−1). In the case of ice cover, it appeared increasingly later (5.3 days dec−1), and disappeared earlier (3.0 days dec−1). The thickness of ice cover also decreased (2.4 cm dec−1). Statistical analysis by means of a Pettitt test showed that the critical moment for the transformations of the thermal and ice regime was the end of the 1980’s. In addition to the obvious relations with air temperature for both characteristics, it was evidenced that the occurrence of ice cover depended on wind speed and snow cover. The recorded changes in the case of Lake Śniardwy are considered unfavourable, and their consequences will affect the course of physical, chemical, and biological processes in the largest lake in Poland.

ACS Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak. Effect of climate warming on a change in thermal and ice conditions in the largest lake in Poland – Lake Śniardwy. Journal of Hydrology and Hydromechanics 2020, 68, 260 -270.

AMA Style

Mariusz Ptak, Mariusz Sojka, Bogumił Nowak. Effect of climate warming on a change in thermal and ice conditions in the largest lake in Poland – Lake Śniardwy. Journal of Hydrology and Hydromechanics. 2020; 68 (3):260-270.

Chicago/Turabian Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak. 2020. "Effect of climate warming on a change in thermal and ice conditions in the largest lake in Poland – Lake Śniardwy." Journal of Hydrology and Hydromechanics 68, no. 3: 260-270.

Conference paper
Published: 09 June 2020 in E3S Web of Conferences
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Planning green infrastructure in the cities is a challenging task for planners and city managers. Developing multifunctional green space systems provide many benefits including: increasing water retention, mitigating urban heat island effect, microclimate regulation, reducing air, water and noise pollution and conservation biodiversity. The greenery in the city also have an impact on human health. The paper presents the possibilities of using LiDAR data mapping vegetation density in urban areas on the example of Gorzów Wielkopolski (Poland). Maps made as a result of processing the point clouds obtained from airborne laser scanning represents the most accurate, comprehensive and detailed assessment of Gorzów Wielkopolski vegetation cover to date and establishes the baseline for greenery governance and planning of green infrastructure in the city.

ACS Style

Krzysztof Pyszny; Mariusz Sojka; Rafał Wróżyński. LiDAR based urban vegetation mapping as a basis of green infrastructure planning. E3S Web of Conferences 2020, 171, 02008 .

AMA Style

Krzysztof Pyszny, Mariusz Sojka, Rafał Wróżyński. LiDAR based urban vegetation mapping as a basis of green infrastructure planning. E3S Web of Conferences. 2020; 171 ():02008.

Chicago/Turabian Style

Krzysztof Pyszny; Mariusz Sojka; Rafał Wróżyński. 2020. "LiDAR based urban vegetation mapping as a basis of green infrastructure planning." E3S Web of Conferences 171, no. : 02008.

Conference paper
Published: 09 June 2020 in E3S Web of Conferences
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The paper presents the quantitative methodology for visual impact assessment of river regulation structures such as non-submerged groins and longitudinal dams. The method integrates LIDAR data, GIS tools, 3D graphic software and 360° panoramic images. Digital Surface Model (DSM) developed on the basis of LIDAR data and imported to 3D graphic software allows one to render images from any location of 3D scene. This feature was used for rendering 360° panoramic images from the perspective of the observers located on the study site in designated with the viewshed analysis area. Renders were verified against panoramic photographs taken during the field inspection. The proposed methodology was tested on two locations of Kostrzyn nad Odrą and Słubice cities where modernization of regulation structures on Oder River is planned. Calculated percentage values of river regulation structures occupying the full field of view of the observer for 25 locations in Kostrzyn nad Odrą and 19 locations in Słubice shows insignificant visual impact. The maximum values of 0.94% and 0.26% for Kostrzyn nad Odrą and Słubice respectively, where obtained. Additionally the visualization method in the form of “Little Planet” projections was presented, which allows for full documentation of the visual impact of the structures on the landscape.

ACS Style

Rafał Wróżyński; Krzysztof Pyszny; Mariusz Sojka. Visual impact assessment of river regulation structures. E3S Web of Conferences 2020, 171, 02015 .

AMA Style

Rafał Wróżyński, Krzysztof Pyszny, Mariusz Sojka. Visual impact assessment of river regulation structures. E3S Web of Conferences. 2020; 171 ():02015.

Chicago/Turabian Style

Rafał Wróżyński; Krzysztof Pyszny; Mariusz Sojka. 2020. "Visual impact assessment of river regulation structures." E3S Web of Conferences 171, no. : 02015.

Conference paper
Published: 09 June 2020 in E3S Web of Conferences
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The paper presents the possibility of using GIS tools and 3D graphic software to assess the impact of high voltage overhead transmission lines on the landscape. The paper uses a digital elevation model developed on the basis of airborne laser scanning data. In addition, potential locations and high voltage overhead transmission lines tower heights have been used. The Viewshed tool available in the ArcGIS software made it possible to calculate the visibility range of tower. To limit the spatial range of the analysis 3D simulations were carried out in Blender version 2.79. Visibility range analysis was performed in the range from 250 m to 3000 m in steps of 250 m. The render analysis in relation to the percentage of the area occupied by the HVOTLs tower in the total field of view, allowed to limit the range of the analysis. Calculations have shown that the range of the HVOTLs tower impact assessment should be limited to 2 km. The very strong and strong visual impact of the tower range from 0 to 250 m. In contrast, there is a significant impact between 251 m and 750 m and a moderate and weak impact above 750 m.

ACS Style

Mariusz Sojka; Rafał Wróżyński; Krzysztof Pyszny. Application of 3D graphic software and GIS in visual impact assessment of high-voltage overhead transmission lines. E3S Web of Conferences 2020, 171, 02010 .

AMA Style

Mariusz Sojka, Rafał Wróżyński, Krzysztof Pyszny. Application of 3D graphic software and GIS in visual impact assessment of high-voltage overhead transmission lines. E3S Web of Conferences. 2020; 171 ():02010.

Chicago/Turabian Style

Mariusz Sojka; Rafał Wróżyński; Krzysztof Pyszny. 2020. "Application of 3D graphic software and GIS in visual impact assessment of high-voltage overhead transmission lines." E3S Web of Conferences 171, no. : 02010.

Journal article
Published: 28 April 2020 in Agronomy
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Control drainage (CD) is a common practice implemented to control the water balance of drainage fields by increasing the amount of water retained in soil. Worldwide studies suggest that climate change can reduce the effectiveness of CD solutions, but no study of CD effects has been carried out in Polish conditions yet. In this study, the DRAINMOD (Wayne Skaggs, North Carolina State University, Raleigh, USA) computer simulation model was used to predict the effects of CD on the time horizons of 2021–2050 (near future) and 2071–2100 (far future) assuming the Representative Concentration Pathway (RCP) 4.5 emission scenario. The effectiveness of CD solutions is presented for a drainage network with spacing of 7 or 14 m. Additionally, different dates of blocking the outflow from the drainage network (1st and 15th of March and 1st and 15th of April) and different initial groundwater table conditions (0.4, 0.6, and 0.8 m) were assumed. All simulations for different variants were carried out for the same period, i.e., from 1st of March to 30th of September. The results of climate models indicated that in the area of central-western Poland in the near and far future there will be an increase in air temperatures by 1.02 and 1.97 °C, respectively, and in precipitation by 5.98% and 10.15%, respectively. In addition, there will be a change in the structure of precipitation, especially with respect to the extension of rain-free periods and an increase in the amount of extreme daily precipitation. The effect of climate change will be a decrease in the mean groundwater table in the fields equipped with drainage systems from 2 to 5 cm. In addition, the number of days on which groundwater table will be above the level of the drainage network will decrease. For the drainage network with spacing of 7 m, the time of the groundwater table above the level of the drainage network will decrease by 5 and 7 days in the near and far future, respectively, while for the drainage network with spacing of 14 m, it will decrease by 4 and 7 days. Climate change will also reduce sub-surface outflow. Subsurface outflows will be smaller than those currently recorded on average by 11% and 17% and 12% and 18% for 7 m and 14 m spacing drainage networks, in the near and far future, respectively. The increase in rainfall intensity in the near and far future will result in a fivefold increase in surface outflow in comparison to the present situation. The simulations show that the greatest effectiveness of CD solutions will be achieved by starting the blocking of outflow from the drainage network on the 1st of March. The implementation of CD solutions since April in the near and far future will allow maintaining the groundwater table at the level presently observed for the conventional network (free drainage-FD).

ACS Style

Mariusz Sojka; Michał Kozłowski; Barbara Kęsicka; Rafał Wróżyński; Rafał Stasik; Michał Napierała; Joanna Jaskuła; Daniel Liberacki. The Effect of Climate Change on Controlled Drainage Effectiveness in the Context of Groundwater Dynamics, Surface, and Drainage Outflows. Central-Western Poland Case Study. Agronomy 2020, 10, 625 .

AMA Style

Mariusz Sojka, Michał Kozłowski, Barbara Kęsicka, Rafał Wróżyński, Rafał Stasik, Michał Napierała, Joanna Jaskuła, Daniel Liberacki. The Effect of Climate Change on Controlled Drainage Effectiveness in the Context of Groundwater Dynamics, Surface, and Drainage Outflows. Central-Western Poland Case Study. Agronomy. 2020; 10 (5):625.

Chicago/Turabian Style

Mariusz Sojka; Michał Kozłowski; Barbara Kęsicka; Rafał Wróżyński; Rafał Stasik; Michał Napierała; Joanna Jaskuła; Daniel Liberacki. 2020. "The Effect of Climate Change on Controlled Drainage Effectiveness in the Context of Groundwater Dynamics, Surface, and Drainage Outflows. Central-Western Poland Case Study." Agronomy 10, no. 5: 625.

Journal article
Published: 07 April 2020 in WASSERWIRTSCHAFT
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ACS Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak; Tomasz Kałuża. Tendenzen der Veränderungen der Wassertemperatur von Seen in Nord-Ost-Polen. WASSERWIRTSCHAFT 2020, 110, 41 -45.

AMA Style

Mariusz Ptak, Mariusz Sojka, Bogumił Nowak, Tomasz Kałuża. Tendenzen der Veränderungen der Wassertemperatur von Seen in Nord-Ost-Polen. WASSERWIRTSCHAFT. 2020; 110 (4):41-45.

Chicago/Turabian Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak; Tomasz Kałuża. 2020. "Tendenzen der Veränderungen der Wassertemperatur von Seen in Nord-Ost-Polen." WASSERWIRTSCHAFT 110, no. 4: 41-45.

Journal article
Published: 31 March 2020 in Polish Journal of Environmental Studies
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ACS Style

Marcin Siepak; Marek Marciniak; Mariusz Sojka; Katarzyna Pietrewicz. Trace Elements in Surface Water and Bottom Sediments in the Hyporheic Zone of Lake Wadąg, Poland. Polish Journal of Environmental Studies 2020, 29, 2327 -2337.

AMA Style

Marcin Siepak, Marek Marciniak, Mariusz Sojka, Katarzyna Pietrewicz. Trace Elements in Surface Water and Bottom Sediments in the Hyporheic Zone of Lake Wadąg, Poland. Polish Journal of Environmental Studies. 2020; 29 (3):2327-2337.

Chicago/Turabian Style

Marcin Siepak; Marek Marciniak; Mariusz Sojka; Katarzyna Pietrewicz. 2020. "Trace Elements in Surface Water and Bottom Sediments in the Hyporheic Zone of Lake Wadąg, Poland." Polish Journal of Environmental Studies 29, no. 3: 2327-2337.

Journal article
Published: 13 February 2020 in Water
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The ecological water quality in rivers and streams is influenced both by the morphological factors (within the watercourse channel and by the dynamic factors associated with flow), as well as biological factors (connected with the flora and fauna characteristic of its specific area). This paper presents an analysis of the effect of river channel shading by trees and shrubs on hydromorphological changes in a selected reach of the Wełna River, Poland. The analysis was conducted on two adjacent cross-sections (one in a reach lined with trees, the other in an open area with no tree or shrub vegetation). Data were collected during field surveys in the years 2014 and 2019. According to the Water Framework Directive, the Wełna River represents a watercourse with small and average-sized watershed areas, with sand being the dominant substrate of the river bottom. Flow volume, distributions of velocity in the sections, as well as substrate grain-size characteristics and river bottom morphology, were determined based on field measurements. In the study, the leaf area index (LAI) of vegetation was measured in the reach lined with trees, while the number and species composition of macrophytes were determined in the investigated river reaches. Moreover, a digital surface model (DSM) and Geoinformation Information System GIS tools were used to illustrate variability in shading within the tree-lined reach. The DSM model was based on Light Detection and Ranging (LIDAR) data. The results of this study enable us to establish the relationship between river shading by vegetation covering the bank zone, and changes in hydromorphological parameters of the river channel.

ACS Style

Tomasz Kałuża; Mariusz Sojka; Rafał Wróżyński; Joanna Jaskuła; Stanisław Zaborowski; Mateusz Hämmerling. Modeling of River Channel Shading as a Factor for Changes in Hydromorphological Conditions of Small Lowland Rivers. Water 2020, 12, 527 .

AMA Style

Tomasz Kałuża, Mariusz Sojka, Rafał Wróżyński, Joanna Jaskuła, Stanisław Zaborowski, Mateusz Hämmerling. Modeling of River Channel Shading as a Factor for Changes in Hydromorphological Conditions of Small Lowland Rivers. Water. 2020; 12 (2):527.

Chicago/Turabian Style

Tomasz Kałuża; Mariusz Sojka; Rafał Wróżyński; Joanna Jaskuła; Stanisław Zaborowski; Mateusz Hämmerling. 2020. "Modeling of River Channel Shading as a Factor for Changes in Hydromorphological Conditions of Small Lowland Rivers." Water 12, no. 2: 527.

Journal article
Published: 01 February 2020 in Water
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The paper presents the results of chemical analysis of lake waters in Bory Tucholskie National Park (BTNP). The BTNP area is unique due to its location within a single catchment and high variability in geological structure. Moreover, the lakes have different morphometric parameters, represent different hydrological types, trophic types and thermal regimes. Another unique feature is the existence of five lobelia lakes. This name comes from the Latin name of the taxon – Lobelia dortmanna L. which has been included in the Polish Red Data Book of Plants. The chemical analysis included 55 parameters, within macro elements (MEs), trace elements (TEs) and rare earth elements (REEs). Low concentrations of MEs, TEs and REEs confirm the absence of anthropogenic pressure. High variation of ME, TE and REE contents between individual lakes is due to different geological structure. The cluster analysis enabled lakes to be divided into six groups taking into account all analyzed water quality parameters. The lobelia lakes were characterized by the lowest concentrations of MEs and REEs, which mainly result from the small catchment area and their mainly endorheic character. The highest variability of MEs, TEs and REEs occurred in endorheic lakes, where the geological structure was dominant. The lowest variability of MEs, TEs and REEs occurred in the lakes connected by the Struga Siedmiu Jezior stream. The analysis of MEs, TEs and REEs in relation to the environmental factors and trophic, hydrologic and thermal typology allowed a better understanding of their spatial distribution in the BTNP lakes. The obtained results indicate that the values of the studied elements were generally close to the average values noted in surface waters according to the Geochemical Atlas of Europe.

ACS Style

Mariusz Sojka; Adam Choiński; Mariusz Ptak; Marcin Siepak. The Variability of Lake Water Chemistry in the Bory Tucholskie National Park (Northern Poland). Water 2020, 12, 394 .

AMA Style

Mariusz Sojka, Adam Choiński, Mariusz Ptak, Marcin Siepak. The Variability of Lake Water Chemistry in the Bory Tucholskie National Park (Northern Poland). Water. 2020; 12 (2):394.

Chicago/Turabian Style

Mariusz Sojka; Adam Choiński; Mariusz Ptak; Marcin Siepak. 2020. "The Variability of Lake Water Chemistry in the Bory Tucholskie National Park (Northern Poland)." Water 12, no. 2: 394.

Journal article
Published: 25 January 2020 in Remote Sensing
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The study presents a new method for quantitative landscape assessment. The method uses LiDAR data and combines the potential of GIS (ArcGIS) and 3D graphics software (Blender). The developed method allows one to create Classified Digital Surface Models (CDSM), which are then used to create 360° panoramic images from the point of view of the observer. In order to quantify the landscape, 360° panoramic images were transformed to the Interrupted Sinusoidal Projection using G.Projector software. A quantitative landscape assessment is carried out automatically with the following landscape classes: ground, low, medium, and high vegetation, buildings, water, and sky according to the LiDAR 1.2 standard. The results of the analysis are presented quantitatively—the percentage distribution of landscape classes in the 360° field of view. In order to fully describe the landscape around the observer, graphs of little planets have been proposed to interpret the obtained results. The usefulness of the developed methodology, together with examples of its application and the way of presenting the results, is described. The proposed Quantitative Landscape Assessment method (QLA360) allows quantitative landscape assessment to be performed in the 360° field of view without the need to carry out field surveys. The QLA360 uses LiDAR American Society of Photogrammetry and Remote Sensing (ASPRS) classification standards, which allows one to avoid differences resulting from the use of different algorithms for classifying images in semantic segmentation. The most important advantages of the method are as follows: observer-independent, 360° field of view which simulates human perspective, automatic operation, scalability, and easy presentation and interpretation of results.

ACS Style

Rafał Wróżyński; Krzysztof Pyszny; Mariusz Sojka. Quantitative Landscape Assessment Using LiDAR and Rendered 360° Panoramic Images. Remote Sensing 2020, 12, 386 .

AMA Style

Rafał Wróżyński, Krzysztof Pyszny, Mariusz Sojka. Quantitative Landscape Assessment Using LiDAR and Rendered 360° Panoramic Images. Remote Sensing. 2020; 12 (3):386.

Chicago/Turabian Style

Rafał Wróżyński; Krzysztof Pyszny; Mariusz Sojka. 2020. "Quantitative Landscape Assessment Using LiDAR and Rendered 360° Panoramic Images." Remote Sensing 12, no. 3: 386.

Journal article
Published: 15 December 2019 in Acta Scientiarum Polonorum Formatio Circumiectus
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Cel pracy: Celem pracy było wykorzystanie wskaźników geochemicznych i ekotoksykologicznych w ocenie stopnia zanieczyszczania metalami ciężkimi osadów dennych jezior. Materiał i metody: Do badań wybrano 16 jezior zlokalizowanych na obszarze Pojezierza Gnieźnieńskiego w...

ACS Style

Mariusz Sojka; Joanna Jaskuła; Rafał Wróżyński. ANALYSIS OF HEAVY METALS CONTAMINATION IN BOTTOM SEDIMENTS OF LAKES LOCATED IN THE GNIEZNO LAKELAND. Acta Scientiarum Polonorum Formatio Circumiectus 2019, 18, 137 -149.

AMA Style

Mariusz Sojka, Joanna Jaskuła, Rafał Wróżyński. ANALYSIS OF HEAVY METALS CONTAMINATION IN BOTTOM SEDIMENTS OF LAKES LOCATED IN THE GNIEZNO LAKELAND. Acta Scientiarum Polonorum Formatio Circumiectus. 2019; 18 (4):137-149.

Chicago/Turabian Style

Mariusz Sojka; Joanna Jaskuła; Rafał Wróżyński. 2019. "ANALYSIS OF HEAVY METALS CONTAMINATION IN BOTTOM SEDIMENTS OF LAKES LOCATED IN THE GNIEZNO LAKELAND." Acta Scientiarum Polonorum Formatio Circumiectus 18, no. 4: 137-149.

Journal article
Published: 17 September 2019 in Polish Journal of Environmental Studies
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ACS Style

Joanna Jaskuła; Mariusz Sojka. Assessing Spectral Indices for Detecting Vegetative Overgrowth of Reservoirs. Polish Journal of Environmental Studies 2019, 28, 4199 -4211.

AMA Style

Joanna Jaskuła, Mariusz Sojka. Assessing Spectral Indices for Detecting Vegetative Overgrowth of Reservoirs. Polish Journal of Environmental Studies. 2019; 28 (6):4199-4211.

Chicago/Turabian Style

Joanna Jaskuła; Mariusz Sojka. 2019. "Assessing Spectral Indices for Detecting Vegetative Overgrowth of Reservoirs." Polish Journal of Environmental Studies 28, no. 6: 4199-4211.

Journal article
Published: 01 September 2019 in Quaestiones Geographicae
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The paper presents the dynamics of daily water temperature fluctuations in Lake Kierskie (West Poland) and determines the effect of air temperatures and wind speed on the variability of the parameter (water temperature). The analysis was based on hourly water temperature values from the period from May 2012 to January 2018. The data analysis permitted the description of the thermal regime of waters in the lake in the hourly cycle in reference to each month, and designation of months characterised by the highest and lowest stability of water temperatures. More than half of the analysed days was characterised by a change in water temperature not exceeding 1°C. The course of water temperature showed strongly positive correlations with air temperature, and weak correlations with wind speed. Water temperatures in the lake were correlated the strongest with air temperatures with a 24 h time step.

ACS Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak. Characteristics of daily water temperature fluctuations in lake kierskie (West Poland). Quaestiones Geographicae 2019, 38, 41 -49.

AMA Style

Mariusz Ptak, Mariusz Sojka, Bogumił Nowak. Characteristics of daily water temperature fluctuations in lake kierskie (West Poland). Quaestiones Geographicae. 2019; 38 (3):41-49.

Chicago/Turabian Style

Mariusz Ptak; Mariusz Sojka; Bogumił Nowak. 2019. "Characteristics of daily water temperature fluctuations in lake kierskie (West Poland)." Quaestiones Geographicae 38, no. 3: 41-49.