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Changes in Physicochemical Indicators of Water Resulting from River Activities. Case Study in Nida Valley, Poland

100%

Phan C. N. , Stużyński A. , Kowalik T.

Journal of Ecological Engineering

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2024

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tom Vol. 25, nr 3

182--194

EN

Stara Nida represents one of the three hydrological channels traversing the Nadnidziański Landscape Park, a locale characterized by ecological diversity within the Nida valley, Poland. Historically rendered inactive due to flow regulation, this specific river branch underwent restoration in February 2023 as a pivotal component of the “Restoration of the Inland Delta of the Nida River” project. The revitalization of Stara Nida has precipitated beneficial ecological metamorphoses within the landscape. To evaluate the impact of the restoration of the Stara Nida branch on the physicochemical characteristics of water in the landscape, systematic sampling of regional SW and GW was conducted. The sampling duration covered a 12-month period, segmented into two phases: the first six months leading up to the restoration (from February 2022 to July 2022) and the subsequent six months following the restoration of the Stara Nida branch (from February 2023 to July 2023). A total of 114 water samples were collected from 10 distinct sampling locations. In-situ measurements of key indicators, including temperature (T), electrical conductivity (EC), dissolved oxygen (DO), pH, and total dissolved solids (TDS), were performed using handheld devices. Concurrently, laboratory analyses were carried out for total nitrogen (TN), total phosphorus (TP), chloride (Cl–), sulfate (SO42–), manganese (Mn2+), iron (Fe2+,3+), zinc (Zn2+), cadmium (Cd2+), lead (Pb2+), copper (Cu2+), and chemical oxygen demand (COD). Statistical analyses encompassed the Shapiro-Wilk test (α = 0.05) and the Wilcoxon (Mann-Whitney) rank sum test (α = 0.05) to discern significant disparities in physicochemical indicators at sampling points pre- and post-restoration of the Stara Nida branch. Additionally, Pearson correlation analysis (α = 0.001) was employed to evaluate overarching changes at the sampling points attributable to the impact of the Stara Nida branch restoration.

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Monthly changes in physicochemical parameters of the groundwater in Nida valley, Poland (case study)

100%

Phan C. N. , Strużyński A. , Kowalik T.

Journal of Water and Land Development

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2023

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tom no. 56

220--234

EN

The groundwater of the Nida valley was investigated to assess the quality of water source and monthly variations of the physicochemical parameters. A total of 70 water samples were collected from 7 sampling sites during a 10 months period from June 2021 to March 2022. Sampling frequency was once per month. The parameters such as temperature (T), electrical conductivity (EC), dissolved oxygen (DO), pH, total dissolved solids (TDS) were measured in-situ by using handheld device. Meanwhile, total nitrogen (TN), total phosphorus (TP), chloride (Cl – ), sulphate (SO42– ), manganese (Mn), iron (Fe), zinc (Zn), cadmium (Cd), lead (Pb), copper (Cu), chemical oxygen demand (COD) were analysed in the laboratory. According to the classification of Ministry of Marine Economy and Inland Navigation in Poland (2019), some investigated parameters are classified as unsatisfactory quality waters (class 4) and poor-quality waters (class 5) for a few specific months. Such as, TP concentrations obtained in June and January are classified as class 4, SO42– concentrations corresponded to classes 4 and 5 in June, July and August, and Mn concentrations (except in January) are settled in class 5. The high values of Fe in November are arranged in class 5 and in June, July to September and March are classified in class 4. Statistical methods were used as: Shapiro-Wilk test (α = 0.05), ANOVA test and post-hoc Tukey test (α = 0.05), Kruskal-Wallis test and Wilcoxon (Mann-Whitney) rank sum test (α = 0.05) estimated the significant differences in sampling months. Pearson correlation analysis (α = 0.01 and 0.05), principal component analysis (PCA) and cluster analysis showed correlation between the parameters and sampling months.

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Correlation Between Hydrochemical Component of Surface Water and Groundwater in Nida Valley, Poland

100%

Phan C. N. , Strużyński A. , Kowalik T.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 12

167--177

EN

The Nida valley study area underwent examination to investigate the hydrochemical components and the correlation between groundwater (GW) and surface water (SW). Over a 12-month period from November 2021 to October 2022, 9 monitoring points were established, consisting of 7 GW points and 2 SW points, with a monitoring frequency of once per month. The research findings indicate that the hydrochemical components and direction of GW flow in the study area can be classified into 3 distinct regions. The chemical composition is complex in areas near the Nida River, stable in the region near the Smuga Umianowicka branch, and different in other areas. It was observed that the SW in the Nida River and Smuga Umianowicka branch exhibits a relatively uncomplicated chemical composition due to minimal human impact in the natural area. However, dissimilarities between them were also identified and explained by the flow regulation of the dam built on the branch within the study area. The application of the Shapiro-Wilk test (α = 0.05) and Kruskal-Wallis test (α = 0.05) revealed statistically significant differences among the recorded hydrochemical component values throughout the measurement period. Furthermore, Pearson’s correlation coefficient analysis (α = 0.001) indicated correlations between the hydrochemical components of SW and GW in the riparian area and strong correlations among GW samples. Principal Component Analysis (PCA) identified significant dissimilarity and similarity between GW and SW samples based on their characteristics.

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Interaction of surface water and groundwater in Nida valley, Poland

86%

Phan C. N. , Strużyński A. , Kowalik T.

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tom no. 59

35--43

EN

The study area of the Nida valley was examined to investigate variations in groundwater and surface water levels, as well as the interaction between them. In the valley, there were three branches. The two actives were the Nida River itself and the Smuga Umianowicka branch while the Stara Nida branch was dry during the measurement session. Over a 12-month period from June 2021 to June 2022, 7 monitoring points were equipped with piezometers, comprising 5 groundwater points and 2 surface water points. The monitoring frequency was set to 30 minutes. The results of this research indicate that there are significant differences in the water level at the same observed point at different times. This study demonstrates seasonal changes in both surface water and groundwater levels with higher levels in autumn and winter and lower levels in spring and summer, which are closely tied to the changes in meteorological conditions during the research period, such as precipitation and air temperature. The study results also indicate that during summer and winter at the Nida River and its riparian area, losing stream is the primary process occurring in the studied reach. Conversely, during autumn and spring, the main process is gaining stream. At the human-maintained Smuga Umianowicka branch and in its riparian area, losing stream is the main process during summer and autumn, and gaining stream is the main process during spring. During winter, losing stream and gaining stream processes can occur simultaneously, and neither process takes place mainly.

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Factors affecting the distribution of Anodonta cygnea L. (Bivalvia: Unionidae) in the Nida River valley

86%

Zajac K.

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nr 1-4

6

Rediscovery of an “extinct” fly Adapsilia coarctata Waga, 1842 (Diptera: Pyrgotidae) in Poland

72%

Trojan P.

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2007

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tom 50

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nr 1

7

Transformacja fali powodziowej w warunkach renaturyzacji rzeki Nidy i jej doliny

58%

Struzynski A.

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tom 12

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nr 1

PL

Rzeka Nida płynie w województwie świętokrzyskim po obszarach zagospodarowanych przeważnie rolniczo. W chwili obecnej stwarza w dolnym biegu duże zagrożenie powodziowe, m.in. ze względu na brak małej retencji, która może być dostępna po likwidacji zbędnych obwałowań przeciwpowodziowych. Obliczono wpływ zwiększenia retencji poprzez otwarcie doliny na odcinku od Rębowa do Pińczowa na bezpośrednio poniżej leżące obszary Nidy nieuregulowanej. Za pomocą programu HEC-RAS wykonano obliczenia zasięgu zalewu 10,3 km odcinka rzeki. W tym celu przygotowano 103 przekroje poprzeczne odległe od siebie o średnio 100 m. Symulację wykonano dla szerokiego zakresu przepływów od 1m3 · s–1 do Q1% .

EN

The Nida River flows in Świętokrzyskie district over the valley which is used mostly by agriculture. At present in it’s lower run the river is quite danger during floods due to the lack of small retention. This could be easily restored after removing of the embankments. After the increase of the retention by the opening of the valley areas, the reflection of the river itself on the close to nature run was calculated. In the paper the results of the flooded zones on the reach length of 10.3 km are presented. For the case 103 cross-sections distributed every 100 meters were prepared. The simulations of flooding by discharges between 1 m3 · s–1 and Q1% were performed.