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Prof. Dariusz Wrzesiński
Department of Hydrology and Water Management, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University

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Research Keywords & Expertise

0 Transformations of Hydrological Regime of Rivers and Lakes
0 Effects of Oceanic-Atmospheric Oscillations on Rivers and Lakes
0 Sustainable Water Resources Management
0 Detection Of Changes In The Hydrological Regime
0 Copulas in Hydrology and Water Resources

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Journal article
Published: 28 April 2021 in Water
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On the basis of daily precipitation and discharges recorded in 1974–2013 relations between precipitation and runoff in the Kłodzka Valley (KV) in south-western Poland were analyzed. The degree of synchronicity between them was determined using the bivariate Archimedean copulas. This study aims at identifying and then describe in a probabilistic way the precipitation and runoff relations in the area playing an important role in the formation of water resources, but also particularly exposed to flooding. It was found that isolines of the synchronous occurrence of precipitation and total runoff in the Nysa Kłodzka catchment controlled by gauge Kłodzko had a zonal distribution, with the synchronicity values decreasing from south-east to north-west of the study area. This proves that its eastern part is more hydrologically active, compared to the western part, and as such it determines the amount of water resources of the study area. The decrease in synchronicity is influenced by the type and spatial distribution of precipitation, the structure of water supply, and the geological structure of the study area. Moreover, probabilistic methods applied in this research differ from those used in previous research on the hydrology of KV, as we propose using the copula functions. The method presented can be used to evaluate the availability of water resources in areas playing a key role in their formation on different scales.

ACS Style

Adam Perz; Leszek Sobkowiak; Dariusz Wrzesiński. Probabilistic Approach to Precipitation-Runoff Relation in a Mountain Catchment: A Case Study of the Kłodzka Valley in Poland. Water 2021, 13, 1229 .

AMA Style

Adam Perz, Leszek Sobkowiak, Dariusz Wrzesiński. Probabilistic Approach to Precipitation-Runoff Relation in a Mountain Catchment: A Case Study of the Kłodzka Valley in Poland. Water. 2021; 13 (9):1229.

Chicago/Turabian Style

Adam Perz; Leszek Sobkowiak; Dariusz Wrzesiński. 2021. "Probabilistic Approach to Precipitation-Runoff Relation in a Mountain Catchment: A Case Study of the Kłodzka Valley in Poland." Water 13, no. 9: 1229.

Chapter
Published: 24 January 2021 in Springer Water
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Poland is characterized by relatively significantly diversified environmental conditions, reflected in various water supply conditions and seasonality of the river flow, which determines the flow regime. Based on the Pardé coefficient, five types of river regime: three nival (snowy) – poorly, moderately and well-formed, nival-pluvial (snowy-rainy) and pluvial-nival (rainy-snowy), respectively, can be distinguished. While the nival regime is represented mainly by lowland rivers in the central and northern parts of the country, rivers in the southern, upland and mountainous parts have the nival-pluvial and pluvial-nival regimes. Rivers representing the nival poorly formed type are characterized by the most even flows and the highest share of the groundwater flow in the total flow in the annual cycle. In contrast, rivers with the nival well-formed regime are distinguished by the most contrasting types of periods, from deep low-water to very high high-water. Climate changes and the human impact on water relations make the features of the river flow regime change. Rivers with similar changes in flow conditions, except from those with transformation of water relations caused by human activity, also represent similar geographical regions. This indicates the importance of climatic conditions in the modification of the characteristics of the flow regime. Certain evidence of the influence of climatic conditions on changes in the flow regime in the winter-spring period may be a significant decrease in winter flows observed in many rivers, and a delayed increase in the spring thaw in the 1950s and 1960s. In turn, in the 1970s and 1980s in these rivers, there was a disappearance of the winter low-water stages associated with a remarkable increase in the winter flow. These regularities indicate the noticeable impact of changes in the intensity of the North Atlantic Oscillation on the transformation of the characteristics of the flow regime of rivers in Poland. Research confirms that there is a temporarily and spatially differentiated impact of the North Atlantic Oscillation on the level of river flows. This impact is not strong but noticeable. It is observed with varying intensity in rivers in many regions of the country, mainly in winter, spring and summer.

ACS Style

Dariusz Wrzesiński. Flow Regime Patterns and Their Changes. Springer Water 2021, 163 -180.

AMA Style

Dariusz Wrzesiński. Flow Regime Patterns and Their Changes. Springer Water. 2021; ():163-180.

Chicago/Turabian Style

Dariusz Wrzesiński. 2021. "Flow Regime Patterns and Their Changes." Springer Water , no. : 163-180.

Journal article
Published: 20 January 2021 in Water
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The study applied the method of hydrological season identification in a time series of river total and base flows and in groundwater levels. The analysis covered a series of daily measurements from the period 2008–2017 in nine catchments located in different geographical regions of Poland. The basis of the classification of hydrological seasons, previously applied for river discharges only, was the transformation of the original variables into a series reflecting three statistical features estimated for single-name days of a year from a multiyear: average value, variation coefficient, and autocorrelation coefficient. New variables were standardized and after hierarchical clustering, every day of a year had a defined type, valorizing three features which refer to quantity, variability, and the stochastic nature of total and base river flow as well as groundwater stage. Finally, sequences of days were grouped into basic (homogenous) seasons of different types and transitional seasons including mixed types of days. Analysis indicated determinants of types, length, and frequency of identified hydrological seasons especially related to river regime, hydrogeological and hydrometeorological conditions as well as physiographical background were directly influenced by geographical location. Analysis of the co-occurrence of the same types of hydrological seasons allowed, in some catchments, periods of synchronic alimentation (groundwater and base flow, mainly in the cold half-year) and water shortages (all three components, mainly in the warm half-year) to be identified.

ACS Style

Przemysław Tomalski; Edmund Tomaszewski; Dariusz Wrzesiński; Leszek Sobkowiak. Relationships of Hydrological Seasons in Rivers and Groundwaters in Selected Catchments in Poland. Water 2021, 13, 250 .

AMA Style

Przemysław Tomalski, Edmund Tomaszewski, Dariusz Wrzesiński, Leszek Sobkowiak. Relationships of Hydrological Seasons in Rivers and Groundwaters in Selected Catchments in Poland. Water. 2021; 13 (3):250.

Chicago/Turabian Style

Przemysław Tomalski; Edmund Tomaszewski; Dariusz Wrzesiński; Leszek Sobkowiak. 2021. "Relationships of Hydrological Seasons in Rivers and Groundwaters in Selected Catchments in Poland." Water 13, no. 3: 250.

Journal article
Published: 23 June 2020 in Water
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Based on daily flows recorded in the period 1971–2010, the synchronous occurrence of the annual (AMAXq), winter (WMAXq), and summer (SMAXq) maximum specific runoffs in 39 sub-catchments of the Warta River catchment (WRC) in Poland was analyzed. First, trends in the flows were detected using the non-parametric Mann–Kendall (M-K) test. Then, the degree of the synchronous and asynchronous occurrences of the maximum specific runoffs (MAXq) in respective sub-catchments in relation to the Gorzów Wielkopolski gauge closing the WRC was calculated. Finally, the reasons for the detected spatial and temporal differences were discussed. The study revealed a noticeable variability of the analyzed parameters. The highest synchronicity of AMAXq and WMAXq in relation to the closing Gorzów Wielkopolski gauge was revealed in the man-made Kościański and Mosiński canals and in the sub-catchments of the Noteć, Wełna, and lower Prosna rivers. While compared to AMAXq and WMAXq, the summer maxima showed relatively lower degrees of synchronicity, an increase in the synchronous occurrence of SMAXq in the southern part of WRC, and a decrease in its central part were identified. It was concluded that the stronger synchronicity of WMAXq resulted from the nival regime of the investigated rivers. Consequently, the annual maxima were most often associated with the winter half-year. The detected differences of synchronicity of the annual and seasonal runoffs are conditioned by climate, more specifically by the course of winter and resulting from it snow cover thickness, and also the amount and intensity of rainfall in summer.

ACS Style

Adam Perz; Leszek Sobkowiak; Dariusz Wrzesiński. Spatial Differentiation of the Maximum River Runoff Synchronicity in the Warta River Catchment, Poland. Water 2020, 12, 1782 .

AMA Style

Adam Perz, Leszek Sobkowiak, Dariusz Wrzesiński. Spatial Differentiation of the Maximum River Runoff Synchronicity in the Warta River Catchment, Poland. Water. 2020; 12 (6):1782.

Chicago/Turabian Style

Adam Perz; Leszek Sobkowiak; Dariusz Wrzesiński. 2020. "Spatial Differentiation of the Maximum River Runoff Synchronicity in the Warta River Catchment, Poland." Water 12, no. 6: 1782.

Journal article
Published: 23 June 2020 in Sustainability
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In this study, on the basis of the maximum and mean annual values of flows, dependencies between flows recorded in seven water gauges located in the upper part of the Indus River Basin (IRB) in Pakistan were analyzed. First, the non-parametric Mann–Kendall (M–K) test was used to detect trends in the flows. Next, the Pearson’s correlation coefficient was applied. Then, the selected copulas were used to find joint distributions of the studied time series. In the next stage, the degrees of synchronous and asynchronous occurrence of, respectively, the annual maximum (AMAXF) and mean annual flows (MAF) were calculated. The study revealed that correlations between the flows in selected gauge stations were very strong and statistically significant. These results were confirmed by the synchronicity analysis carried out with the help of the copula functions. The highest relationship was detected in the case of gauges Besham Qila and Kachura on the Indus mainstream, while the lowest was detected in gauges Besham Qila and Naltar on the Naltar River. These findings can be of high practical value in the field of sustainable water resource management, including for flood protection, agricultural water supply, reservoir water storage, and hydropower generation in the IRB.

ACS Style

Leszek Sobkowiak; Adam Perz; Dariusz Wrzesiński; Muhammad Abrar Faiz. Estimation of the River Flow Synchronicity in the Upper Indus River Basin Using Copula Functions. Sustainability 2020, 12, 5122 .

AMA Style

Leszek Sobkowiak, Adam Perz, Dariusz Wrzesiński, Muhammad Abrar Faiz. Estimation of the River Flow Synchronicity in the Upper Indus River Basin Using Copula Functions. Sustainability. 2020; 12 (12):5122.

Chicago/Turabian Style

Leszek Sobkowiak; Adam Perz; Dariusz Wrzesiński; Muhammad Abrar Faiz. 2020. "Estimation of the River Flow Synchronicity in the Upper Indus River Basin Using Copula Functions." Sustainability 12, no. 12: 5122.

Journal article
Published: 13 May 2020
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As one of the globally largest cities suffering from severe water shortage, Beijing is highly dependent on groundwater supply. Located northeast of Beijing, the Pinggu district is an important emergency-groundwater-supply source. This area developed rapidly under the strategy of the integrated development of the Beijing–Tianjin–Hebei region in recent years. It is now important to evaluate the spatiotemporal variations in groundwater quality. This study analyzed groundwater-chemical-monitoring data from the periods 2014 and 2017. Hydrogeochemical analysis showed that groundwater is affected by calcite, dolomite, and silicate weathering. Self-organizing map (SOM) was used to cluster sample sites and identify possible sources of groundwater contamination. Sample sites were grouped into four clusters that explained the different pollution sources: sources of industrial and agricultural activities (Cluster I), landfill sources (Cluster II), domestic-sewage-discharge sources (Cluster III), and groundwater in Cluster IV was less affected by anthropogenic activities. Compared to 2014, concentrations of pollution indicators such as Cl−, SO42−, NO3−, and NH4+ increased, and the area of groundwater affected by domestic sewage discharge increased in 2017. Therefore, action should be taken in order to prevent the continuous deterioration of groundwater quality.

ACS Style

Jia Li; Zheming Shi; Guangcai Wang; Fei Liu; Yulong Zhang; Jianzhong Zhou; Chengwei Lu; Renata Graf; Dariusz Wrzesiński. Evaluating Spatiotemporal Variations of Groundwater Quality in Northeast Beijing by Self-Organizing Map. 2020, 12, 1 .

AMA Style

Jia Li, Zheming Shi, Guangcai Wang, Fei Liu, Yulong Zhang, Jianzhong Zhou, Chengwei Lu, Renata Graf, Dariusz Wrzesiński. Evaluating Spatiotemporal Variations of Groundwater Quality in Northeast Beijing by Self-Organizing Map. . 2020; 12 (5):1.

Chicago/Turabian Style

Jia Li; Zheming Shi; Guangcai Wang; Fei Liu; Yulong Zhang; Jianzhong Zhou; Chengwei Lu; Renata Graf; Dariusz Wrzesiński. 2020. "Evaluating Spatiotemporal Variations of Groundwater Quality in Northeast Beijing by Self-Organizing Map." 12, no. 5: 1.

Journal article
Published: 07 May 2020 in Water
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The study determined water temperature trends of rivers in Poland in the period 1971–2015, and also their spatial and temporal patterns. The analysis covered daily water temperature of 53 rivers recorded at 94 water gauge stations and air temperature at 43 meteorological stations. Average monthly, annual, seasonal and maximum annual tendencies of temperature change were calculated using the Mann–Kendall (M–K) test. Regional patterns of water temperature change were determined on the basis of Ward’s hierarchical grouping for 16 correlation coefficients of average annual water temperature in successive 30-year sub-periods of the multi-annual period of 1971–2015. Moreover, regularities in monthly temperature trends in the annual cycle were identified using 12 monthly values obtained from the M–K Z test. The majority of average annual air and water temperature series demonstrate statistically significant positive trends. In three seasons: spring, summer and autumn, upward tendencies of temperature were detected at 70%–90% of the investigated water gauges. In 82% of the analysed rivers, similarity to the tendencies of change of monthly air temperature was concluded, with the climatic factor being recognised as of decisive importance for the changes in water thermal characteristics of the majority of rivers in Poland. In the winter months, positive trends of temperature were considerably weaker and in general statistically insignificant. On a regional scale, rivers with a quasi-natural thermal regime experienced temperature increases from April to November. In the other cases, different directions of change in river water temperature (RWT) were attributed to various forms of human impact. It was also found that for the majority of rivers the average annual water temperature in the analysed 30-year sub-periods displayed upward trends, statistically significant or close to the significance threshold. Stronger trends were observed in the periods after 1980, while a different nature of water temperature change was detected only in a couple of mountainous rivers or rivers transformed by human impact. In the beginning of the analysed period (1971–2015), the average annual water temperature of these rivers displayed positive and statistically significant trends, while after 1980 the trends were negative. The detected regularities and spatial patterns of water temperature change in rivers with a quasi-natural regime revealed a strong influence of climate on the modification of their thermal regime features. Rivers characterised by a clearly different nature of temperature change, both in terms of the direction of the tendencies observed and their statistical significance, were distinguished by alterations of water thermal characteristics caused by human activity. The results obtained may be useful in optimising the management of aquatic ecosystems, for which water temperature is a significant indicator of the ongoing environmental changes.

ACS Style

Renata Graf; Dariusz Wrzesiński. Detecting Patterns of Changes in River Water Temperature in Poland. Water 2020, 12, 1327 .

AMA Style

Renata Graf, Dariusz Wrzesiński. Detecting Patterns of Changes in River Water Temperature in Poland. Water. 2020; 12 (5):1327.

Chicago/Turabian Style

Renata Graf; Dariusz Wrzesiński. 2020. "Detecting Patterns of Changes in River Water Temperature in Poland." Water 12, no. 5: 1327.

Journal article
Published: 12 February 2020 in Water
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Identification of river flow regime and its possible changes caused by natural factors or human activity is one of major issues in modern hydrology. In such studies different approaches and different indicators can be used. The aim of this study is to determine changes in flow regime of the largest river in Poland—the Vistula, using new, more objectified coefficients and indices, based on data recorded in 22 gauges on the Vistula mainstream and 38 gauges on its tributaries in the multi-year period 1971–2010. The paper consists of three main parts: in the first part, in order to recognize changes in the flow regime characteristics along the Vistula, data from gauges located on the river mainstream were analyzed with the help of the theory of entropy. In the second part gauging stations on the Vistula mainstream and its tributaries were grouped; values of the newly introduced pentadic Pardé’s coefficient of flow (discharge) (PPC) were taken as the grouping criterion. In the third part of the study a novel method of determining river regime characteristics was applied: through the recognition of the temporal structure of hydrological phenomena and their changes in the annual cycle sequences of hydrological periods (characteristic phases of the hydrological cycle) on the Vistula River mainstream and its tributaries were identified and their occurrence in the yearly cycle was discussed. Based on the detected changes of the 73-pentad Pardé’s coefficients of flow four main types of rivers were distinguished. Transformation of the flow regime was reflected in the identified different sequences of hydrological periods in the average annual cycle. It was found that while transformation of the Vistula River regime occurred along its whole course, the most frequent changes were detected in its upper, mountainous reaches, under the influence of the flow characteristics of its tributaries. This allowed the Vistula to be considered the allochthonous river. These findings are interesting not only from a theoretical point of view, but they also can be valuable to stakeholders in the field of the Vistula River basin water management and hydrological forecasting, including flood protection, which has recently become a matter of growing concern due to the observed effects of climate change and human impact.

ACS Style

Dariusz Wrzesiński; Leszek Sobkowiak. Transformation of the Flow Regime of a Large Allochthonous River in Central Europe—An Example of the Vistula River in Poland. Water 2020, 12, 507 .

AMA Style

Dariusz Wrzesiński, Leszek Sobkowiak. Transformation of the Flow Regime of a Large Allochthonous River in Central Europe—An Example of the Vistula River in Poland. Water. 2020; 12 (2):507.

Chicago/Turabian Style

Dariusz Wrzesiński; Leszek Sobkowiak. 2020. "Transformation of the Flow Regime of a Large Allochthonous River in Central Europe—An Example of the Vistula River in Poland." Water 12, no. 2: 507.

Journal article
Published: 15 August 2019 in Water
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The objective of the paper consisted in determining the effect of macroscale types of NAO, AO, EA, EAWR, SCAND, and AMO atmospheric circulation on changes in water temperature in Polish rivers. The study has made use of a broad body of hydrometeorological materials covering daily water temperature values for 96 water gauge stations located on 53 rivers and air temperature values for 43 meteorological stations. Percentage shares of positive and negative coefficients of correlation of annual, seasonal, and monthly circulation type indices with air and river water temperature were determined, demonstrating the character of teleconnection. Determinations were made of water temperature deviations in positive and negative phases of the analyzed indices from average values from the years 1971–2015, and their statistical significance ascertained. Research has shown that relations between the temperature of river waters in Poland and macroscale circulation types are not strong, however they are noticeable, sometimes even statistically significant, and both temporally and spatially diverse. NAO, AO, EA, and AMO indices are characterized by a generally positive correlation with temperature, whereas SCAND and EWAR indices are characterized by a negative correlation. Research showed a varying impact of types of atmospheric circulation, with their effectiveness increasing in the winter season. The strongest impact on temperature was observed for the positive and negative NAO and AO phases, when deviations of water temperature from average values are correspondingly higher (up to 1.0 °C) and lower (by a maximum of 1.5 °C), and also for the positive and negative SCAND phases, when water temperature are correspondingly lower (by a maximum of 0.8 °C) and higher (by 1.2 °C) than average values. The strongest impact on water temperature in summer, mainly in July, was observed for AMO. The results point to the complexity of processes determining the thermal regime of rivers and to the possibility of additional factors—both regional and local—exerting an influence on their temporal and spatial variability.

ACS Style

Renata Graf; Dariusz Wrzesiński. Relationship between Water Temperature of Polish Rivers and Large-Scale Atmospheric Circulation. Water 2019, 11, 1690 .

AMA Style

Renata Graf, Dariusz Wrzesiński. Relationship between Water Temperature of Polish Rivers and Large-Scale Atmospheric Circulation. Water. 2019; 11 (8):1690.

Chicago/Turabian Style

Renata Graf; Dariusz Wrzesiński. 2019. "Relationship between Water Temperature of Polish Rivers and Large-Scale Atmospheric Circulation." Water 11, no. 8: 1690.

Journal article
Published: 06 August 2019 in Water
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The purpose of this study is to find connections between the North Atlantic Thermohaline Circulation (NA THC), climate elements, such as cloud cover, precipitation, air temperature, sunshine duration, and relative humidity, and flow of rivers in Poland. The intensity of NA THC was characterized by the DG3L index, which was established to assess changes in the amount of heat transported by NA THC along with the transport of water to the Arctic. The paper explains and discusses the mechanism of impact of the NA THC changeability on the elements of the catchment water balance variability. The positive and negative phases of the DG3L index are strongly correlated with the heat anomalies in the upper layer of the North Atlantic waters. The obtained results show that changes of NA THC have significant impact on weather conditions and selected climate elements in Poland. Statistically significant positive correlations were found between the DG3L index and average annual air temperatures, particularly in April, July, and August, while negative between the DG3L index and the total cloud cover. Consequently, in the years with the positive values of the DG3L index, there are favorable conditions for the strong increase in evaporation and evapotranspiration from the ground surface. This has impact on flow of rivers in Poland, which shows considerable regional differences.

ACS Style

Dariusz Wrzesiński; Andrzej A. Marsz; Anna Styszyńska; Leszek Sobkowiak. Effect of the North Atlantic Thermohaline Circulation on Changes in Climatic Conditions and River Flow in Poland. Water 2019, 11, 1622 .

AMA Style

Dariusz Wrzesiński, Andrzej A. Marsz, Anna Styszyńska, Leszek Sobkowiak. Effect of the North Atlantic Thermohaline Circulation on Changes in Climatic Conditions and River Flow in Poland. Water. 2019; 11 (8):1622.

Chicago/Turabian Style

Dariusz Wrzesiński; Andrzej A. Marsz; Anna Styszyńska; Leszek Sobkowiak. 2019. "Effect of the North Atlantic Thermohaline Circulation on Changes in Climatic Conditions and River Flow in Poland." Water 11, no. 8: 1622.

Journal article
Published: 13 July 2019 in Water
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Atmospheric processes leading to extreme floods in the Polish Sudeten Mountains were described in this study. A direct impact of heavy precipitation on extremely high runoff episodes was confirmed, and an essential role of synoptic conditions in triggering abundant rainfall was proved. Synoptic conditions preceding each flood event were taken into consideration and the evolution of the pressure field as well as the moisture transport was investigated using the anomaly-based method. Maps of anomalies, constructed for the days prior to floods, enabled recognizing an early formation of negative centers of sea level pressure and also allowed distinguishing areas of positive departures of precipitable water content over Europe. Five cyclonic circulation patterns of different origin, and various extent and intensity, responsible for heavy, flood-triggering precipitation in the Sudetes, were assigned. Most rain-bringing cyclones form over the Mediterranean Sea and some of them over the Atlantic Ocean. A meridional southern transport of moisture was identified in most of the analyzed cases of floods. Recognizing the specific meteorological mechanisms of precipitation enhancement, involving evolution of pressure patterns, change in atmospheric moisture and occurrence of precipitation may contribute to a better understanding of the atmospheric forcing of floods in mountain areas and to improve predicting thereof.

ACS Style

Ewa Bednorz; Dariusz Wrzesiński; Arkadiusz M. Tomczyk; Dominika Jasik. Classification of Synoptic Conditions of Summer Floods in Polish Sudeten Mountains. Water 2019, 11, 1450 .

AMA Style

Ewa Bednorz, Dariusz Wrzesiński, Arkadiusz M. Tomczyk, Dominika Jasik. Classification of Synoptic Conditions of Summer Floods in Polish Sudeten Mountains. Water. 2019; 11 (7):1450.

Chicago/Turabian Style

Ewa Bednorz; Dariusz Wrzesiński; Arkadiusz M. Tomczyk; Dominika Jasik. 2019. "Classification of Synoptic Conditions of Summer Floods in Polish Sudeten Mountains." Water 11, no. 7: 1450.

Journal article
Published: 27 June 2019 in Water
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The paper identifies relationships between lake water levels and indices of macroscale atmospheric circulations: Arctic Oscillation (AO), North Atlantic Oscillation (NAO), East Atlantic (EA), and Scandinavian pattern (SCAND). Correlation coefficients between synchronous and asynchronous series of monthly water levels and 4 circulation indices were calculated. Based on Ward hierarchical grouping considering 156 correlation coefficients, the groups of lakes were designated due to the strength and term of relation of circulation indices with lake water levels. It was found that these links are not strong but noticeable. The strength of relationships varies in space and time, and the designated groups of lakes refer not only to the climatic diversity of the studied area, but also to some extent to the types of water levels regime. The observed relationships are the most important in the case of AO and NAO (particularly in winter period), and slightly weaker for EA and SCAND. The analysis used mean monthly water levels of 15 lakes in northern Poland from 1976–2015.

ACS Style

Katarzyna Plewa; Adam Perz; Dariusz Wrzesiński. Links between Teleconnection Patterns and Water Level Regime of Selected Polish Lakes. Water 2019, 11, 1330 .

AMA Style

Katarzyna Plewa, Adam Perz, Dariusz Wrzesiński. Links between Teleconnection Patterns and Water Level Regime of Selected Polish Lakes. Water. 2019; 11 (7):1330.

Chicago/Turabian Style

Katarzyna Plewa; Adam Perz; Dariusz Wrzesiński. 2019. "Links between Teleconnection Patterns and Water Level Regime of Selected Polish Lakes." Water 11, no. 7: 1330.

Journal article
Published: 20 June 2019 in Water
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The hydrology of coastal lakes differs significantly from that of inland water bodies due to the influence of the neighboring sea. Observed climatic changes are expected to enhance the effect of the sea on coastal lake ecosystems, which makes research on sea–lake interactions even more significant. In this study, on the basis of maximum annual and monthly values of water level, dependencies among the water levels of six lakes located along the southern coast of the Baltic Sea in Poland, and the Baltic Sea water levels were analyzed. First, the Spearman rank correlation and the linear regression method were applied. Then, selected copulas were used to find joint distributions of the studied time series. In the next stage, the degrees of synchronous and asynchronous occurrences of maximum water levels in lakes and the sea were calculated. The study revealed that correlations between the maximum annual water levels in coastal lakes and in the Baltic Sea in the selected gauge stations were very strong and statistically significant. These results were confirmed by a synchronicity analysis carried out with the help of a copula function. The highest relationship was detected in the case of Lake Resko Przymorskie (correlation coefficient 0.86, synchronicity 75.18%), while the lowest were observed in Lakes Jamno (0.62 and 58.20%, respectively) and Bukowo (0.60 and 56.82%, respectively). The relation strength between maximum water levels of the sea and coastal lakes may increase in the future due to sea level rises caused by climate warming.

ACS Style

Katarzyna Plewa; Adam Perz; Dariusz Wrzesiński; Leszek Sobkowiak. Probabilistic Assessment of Correlations of Water Levels in Polish Coastal Lakes with Sea Water Level with the Application of Archimedean Copulas. Water 2019, 11, 1292 .

AMA Style

Katarzyna Plewa, Adam Perz, Dariusz Wrzesiński, Leszek Sobkowiak. Probabilistic Assessment of Correlations of Water Levels in Polish Coastal Lakes with Sea Water Level with the Application of Archimedean Copulas. Water. 2019; 11 (6):1292.

Chicago/Turabian Style

Katarzyna Plewa; Adam Perz; Dariusz Wrzesiński; Leszek Sobkowiak. 2019. "Probabilistic Assessment of Correlations of Water Levels in Polish Coastal Lakes with Sea Water Level with the Application of Archimedean Copulas." Water 11, no. 6: 1292.

Journal article
Published: 01 December 2018 in Bulletin of Geography. Physical Geography Series
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The paper presents the characteristics of hydrological periods in an average annual cycle in Polish lakes. The types of period and their sequence determine the regime of water stages in lakes. The article applies the unsupervised approach to analysis of water level fluctuation patterns, where the regime is identified by grouping analytical parameters. Hydrological periods were designated by grouping elementary time units of the hydrological year (pentads) based on the similarity of their parameters, namely water level frequency distributions. The analysis covered daily water stages in 33 lakes in Poland from the period from 1984 to 2012. Five types of hydrological period were designated. The studied lakes differ in the number, type and sequence of hydrological periods in an average annual cycle. Most of the lakes (19 lakes) have a 4-period temporal structure of water stages with the course of water stages in a year characteristic of this geographical zone. No spatial patterns occurred in the location of lakes from particular groups. This suggests the dominant role of local factors in determining the seasonality of water stages.

ACS Style

Katarzyna Plewa; Dariusz Wrzesiński; Mariusz Ptak. Seasonal structure of water stages on lakes in Northern Poland. Bulletin of Geography. Physical Geography Series 2018, 15, 101 -110.

AMA Style

Katarzyna Plewa, Dariusz Wrzesiński, Mariusz Ptak. Seasonal structure of water stages on lakes in Northern Poland. Bulletin of Geography. Physical Geography Series. 2018; 15 (1):101-110.

Chicago/Turabian Style

Katarzyna Plewa; Dariusz Wrzesiński; Mariusz Ptak. 2018. "Seasonal structure of water stages on lakes in Northern Poland." Bulletin of Geography. Physical Geography Series 15, no. 1: 101-110.

Journal article
Published: 26 June 2018 in Geographia Polonica
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ACS Style

Dariusz Wrzesiński; Mariusz Ptak; Katarzyna Plewa. Effect of the north Atlantic oscillation on water level fluctuations in lakes of northern Poland. Geographia Polonica 2018, 91, 243 -259.

AMA Style

Dariusz Wrzesiński, Mariusz Ptak, Katarzyna Plewa. Effect of the north Atlantic oscillation on water level fluctuations in lakes of northern Poland. Geographia Polonica. 2018; 91 (2):243-259.

Chicago/Turabian Style

Dariusz Wrzesiński; Mariusz Ptak; Katarzyna Plewa. 2018. "Effect of the north Atlantic oscillation on water level fluctuations in lakes of northern Poland." Geographia Polonica 91, no. 2: 243-259.

Journal article
Published: 01 March 2018 in Journal of Hydrology and Hydromechanics
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The aim of this study is to detect changes in flow regime of rivers in Poland. On the basis of daily discharges recorded in 1951-2010 at 159 gauging stations located on 94 rivers regularities in the variability of the river flow characteristics in the multi-year period and in the annual cycle were identified and also their spatial uniformity was examined. In order to identify changes in the characteristics of river regime, similarities of empirical distribution functions of the 5-day sets (pentads) of discharges were analyzed and the percent shares of similar and dissimilar distributions of the 5-day discharge frequencies in the successive 20-year sub-periods were compared with the average values of discharges recorded in 1951-2010. Three alternative methods of river classification were employed and in the classification procedure use was made of the Ward’s hierarchical clustering method. This resulted in identification of groups of rivers different in terms of the degree of transformation of their hydrological regimes in the multi-year and annual patterns.

ACS Style

Dariusz Wrzesiński; Leszek Sobkowiak. Detection of changes in flow regime of rivers in Poland. Journal of Hydrology and Hydromechanics 2018, 66, 55 -64.

AMA Style

Dariusz Wrzesiński, Leszek Sobkowiak. Detection of changes in flow regime of rivers in Poland. Journal of Hydrology and Hydromechanics. 2018; 66 (1):55-64.

Chicago/Turabian Style

Dariusz Wrzesiński; Leszek Sobkowiak. 2018. "Detection of changes in flow regime of rivers in Poland." Journal of Hydrology and Hydromechanics 66, no. 1: 55-64.

Article
Published: 14 February 2018 in Atmosphere
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The objective of the paper was the determination of the effect of teleconnection patterns (North Atlantic Oscillation (NAO), Arctic Oscillation (AO), East Atlantic pattern (EA), East Atlantic/Western Russia (EAWR), and Scandinavian pattern (SCAND)) on changes in air and water temperature in Polish lakes. Correlations of circulation indices with air and lake water temperature were analysed in the monthly cycle. Deviations of values of such components in different phases of the analysed atmospheric circulations types from mean average from the years 1971 to 2015 were also determined. The research showed a variable effect of the atmospheric circulations types. The strongest effect on water temperature was observed in winter, when AO and NAO circulation showed particularly evident influence. Deviations of water temperature from mean values from the analysed multi-annual period generally oscillated around 1.0 °C, reaching a maximum value of 1.4 °C. The presented research shows the complexity of processes determining changes in lake water temperature, the course of which depends on many factors with both regional (e.g., ice cover on lakes) and local range (conditions of water exchange, human pressure).

ACS Style

Mariusz Ptak; Arkadiusz M. Tomczyk; Dariusz Wrzesiński. Effect of Teleconnection Patterns on Changes in Water Temperature in Polish Lakes. Atmosphere 2018, 9, 66 .

AMA Style

Mariusz Ptak, Arkadiusz M. Tomczyk, Dariusz Wrzesiński. Effect of Teleconnection Patterns on Changes in Water Temperature in Polish Lakes. Atmosphere. 2018; 9 (2):66.

Chicago/Turabian Style

Mariusz Ptak; Arkadiusz M. Tomczyk; Dariusz Wrzesiński. 2018. "Effect of Teleconnection Patterns on Changes in Water Temperature in Polish Lakes." Atmosphere 9, no. 2: 66.

Original paper
Published: 09 September 2017 in Theoretical and Applied Climatology
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The agricultural production system and hydropower production of Pakistan is largely dependent on melting water from the Hindu Kush Himalayan and the Karakoram River basins. Regardless of such significant prominence, a complete evaluation of the prevailing state of hydro-climatic variables is missing. In this context, we examine the precipitation variability and uncertainty of river flows based on diversity indexes and Shannon information entropy theory. The results indicate that the Shannon diversity index presents a clear depiction of precipitation variability on all metrological stations as compared to the Simpson diversity index. The maximum precipitation variability was found at Chilas station as compared to Hunza, Bunji and Gilgit stations. The results also show that the diversity indexes are highly, negatively correlated with standard deviation, and the amount of precipitation is less than 50 mm (dry months). At the decadal scale, the Hunza and Astore stations show higher precipitation evenness as compared to the Skardu, Bunji and Gilgit stations. The uncertainty analysis shows higher entropy value ED = 90% for Indus River gauged at Mangla station. The higher entropy means the greater the chaos of the variables and the lower their certainty. The analysis exhibited that the rivers with high stream flow variability also show low entropy of its distribution and therefore higher stream flow concentration in the annual cycle.

ACS Style

Muhammad Abrar Faiz; Dong Liu; Qiang Fu; Dariusz Wrzesiński; Shehakk Muneer; Muhammad Imran Khan; Tianxiao Li; Song Cui. Assessment of precipitation variability and uncertainty of stream flow in the Hindu Kush Himalayan and Karakoram River basins of Pakistan. Theoretical and Applied Climatology 2017, 131, 127 -136.

AMA Style

Muhammad Abrar Faiz, Dong Liu, Qiang Fu, Dariusz Wrzesiński, Shehakk Muneer, Muhammad Imran Khan, Tianxiao Li, Song Cui. Assessment of precipitation variability and uncertainty of stream flow in the Hindu Kush Himalayan and Karakoram River basins of Pakistan. Theoretical and Applied Climatology. 2017; 131 (1):127-136.

Chicago/Turabian Style

Muhammad Abrar Faiz; Dong Liu; Qiang Fu; Dariusz Wrzesiński; Shehakk Muneer; Muhammad Imran Khan; Tianxiao Li; Song Cui. 2017. "Assessment of precipitation variability and uncertainty of stream flow in the Hindu Kush Himalayan and Karakoram River basins of Pakistan." Theoretical and Applied Climatology 131, no. 1: 127-136.

Journal article
Published: 20 March 2017 in Journal of Hydrology and Hydromechanics
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The paper discusses changes in the hydrological regime of high mountain Lake Morskie Oko located in the Tatra Mountains, in the Tatra Mountains National Park, a UNESCO biosphere reserve (MaB). According to the research conducted in the years 1971–2015, its water stages decreased by 3.5 cm·dec−1, mean annual water temperature increased by 0.3°C·dec−1and the duration of ice phenomena and ice cover was reduced by 10 day·dec−1. No considerable changes in maximum values of ice cover thickness were recorded. Such tendencies are primarily caused by long-term changes in climatic conditions – air temperature and atmospheric precipitation. The hydrological regime of the lake was also determined by changes in land use in the lake’s catchment and its location in high mountains.

ACS Style

Mariusz Ptak; Dariusz Wrzesiński; Adam Choiński. Long-term changes in the hydrological regime of high mountain Lake Morskie Oko (Tatra Mountains, Central Europe). Journal of Hydrology and Hydromechanics 2017, 65, 146 -153.

AMA Style

Mariusz Ptak, Dariusz Wrzesiński, Adam Choiński. Long-term changes in the hydrological regime of high mountain Lake Morskie Oko (Tatra Mountains, Central Europe). Journal of Hydrology and Hydromechanics. 2017; 65 (2):146-153.

Chicago/Turabian Style

Mariusz Ptak; Dariusz Wrzesiński; Adam Choiński. 2017. "Long-term changes in the hydrological regime of high mountain Lake Morskie Oko (Tatra Mountains, Central Europe)." Journal of Hydrology and Hydromechanics 65, no. 2: 146-153.

Journal article
Published: 01 October 2016 in Acta Geophysica
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ACS Style

Dariusz Wrzesiński. Use of Entropy in the Assessment of Uncertainty of River Runoff Regime in Poland. Acta Geophysica 2016, 64, 1825 -1839.

AMA Style

Dariusz Wrzesiński. Use of Entropy in the Assessment of Uncertainty of River Runoff Regime in Poland. Acta Geophysica. 2016; 64 (5):1825-1839.

Chicago/Turabian Style

Dariusz Wrzesiński. 2016. "Use of Entropy in the Assessment of Uncertainty of River Runoff Regime in Poland." Acta Geophysica 64, no. 5: 1825-1839.