Article
Environmental Sciences
Adam Repel, Martina Zelenakova, Vinayakam Jothiprakash, Helena Hlavata, Peter Blistan, Ibrahim Gargar, Pavol Purcz
Summary: This paper analyzes daily precipitation data from 48 stations in Slovakia to evaluate spatial distribution, stationarity, and trends. The study finds no significant changes in precipitation in Slovakia currently, but highlights the complexity of floods and hydrological drought caused by landscape water drainage and changes in land use related to rising temperatures.
Article
Water Resources
Sintayehu A. Abebe, Tianling Qin, Xin Zhang, Denghua Yan
Summary: This study focuses on determining trends in precipitation and streamflow series in the Upper Blue Nile River Basin in Ethiopia. The Discrete Wavelet Transform (DWT) and Mann-Kendall test were used to analyze the data. The results show an increasing but insignificant trend in precipitation stations, while streamflow stations exhibit a significant increasing trend. The combined use of DWT and Mann-Kendall test reveals that periodic events up to 4 years have a greater influence on the observed trends.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Environmental Sciences
A. Bharath, Ramesh Maddamsetty, M. Manjunatha, T. Reshma
Summary: The study aims to determine the variability and trend in rainfall in Karnataka state, India. The findings reveal increased annual and seasonal rainfall in the study area, except for a significant decline during the post-monsoon season.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Mohammad Arab Amiri, Milan Gocic
Summary: The analysis using the ITA method and the Mann-Kendall test on the historical precipitation changes in Serbia from 1946-2019 showed that the southwestern part of the country has the greatest increasing trend, with a noticeable gradient in precipitation trend from east to west. The ITA method was found to be more sensitive in detecting hidden trends compared to the MK trend test.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Shahin Shobeiri, Ahmad Sharafati, Aminreza Neshat
Summary: This study evaluated the potential of several gridded precipitation products in trend analysis of precipitation depth and the number of rainy days in various regions of Iran. Results showed that TRMM product performed best in analyzing the number of rainy days trend, while ERA-Interim showed better performance in the trend analysis of precipitation depth in Iran.
Article
Meteorology & Atmospheric Sciences
Zulfaqar Saadi, Zaher Mundher Yaseen, Aitazaz Ahsan Farooque, Nur Athirah Mohamad, Mohd Khairul Idlan Muhammad, Zafar Iqbal
Summary: This study aims to reveal the spatio-temporal trend in extreme rainfall and temperature in Sarawak peatland due to climate change. The Modified Mann-Kendall test was used to analyze trend and confirm the impact of large scale climate events. The study provides essential insights into the behavior of different extreme climate variables and their potential impact on the peatland area susceptible to flood and fire.
WEATHER AND CLIMATE EXTREMES
(2023)
Article
Environmental Sciences
Tcogto Zh. Bazarzhapov, Valentina G. Shiretorova, Larisa D. Radnaeva, Elena P. Nikitina, Bator V. Sodnomov, Bair Z. Tsydypov, Valentin S. Batomunkuev, Vasilii V. Taraskin, Suocheng Dong, Zehong Li, Ping Wang
Summary: Currently, climate change is a growing concern, particularly for Lake Baikal, a World Natural Heritage site. The Russian part of the Selenga watershed provides a suitable location for researching climate change. Understanding the changes in precipitation, runoff, and chemical runoff is crucial for managing water resources sustainably.
Article
Water Resources
Ahmad Roshani, Fatemeh Parak, Hossein Esmaili
Summary: The study revealed significant trends in climate change indices in Iran, with most stations showing negative trends in cool/dry and cool/wet indices. Warm/dry and warm/wet indices had similar behavior, with warm/wet days showing less magnitude and spatial consistency. Over 80% of stations experienced a decrease in annual cold modes and an increase in annual warm modes. Additionally, the Universal Thermal Climate Index showed a significant increase in strong heat stress occurrences and a significant decrease in no thermal stress occurrences.
JOURNAL OF WATER AND CLIMATE CHANGE
(2021)
Article
Geosciences, Multidisciplinary
Cihangir Koycegiz, Meral Buyukyildiz
Summary: Irregular precipitation regimes have significant effects on meteorological disasters, water resource utilization, agricultural production, and biodiversity. This study aims to investigate the temporal and spatial variations of precipitation in Seyhan Basin (Turkey) and calculate nonparametric indices including the Precipitation Concentration Index (PCI), Seasonality Index (SI), and Modified Fournier Index (MFI) to assess the concentration, seasonality, and aggressiveness of precipitation. The results indicate that stations in the southern part of the basin generally exhibit higher index values.
Article
Meteorology & Atmospheric Sciences
Ali Danandeh Mehr, Bahrudin Hrnjica, Ognjen Bonacci, Ali Torabi Haghighi
Summary: This study examined the trends in temperature and precipitation in Osijek from 1900 to 2018. The results showed varying trends in temperature across different seasons and temperature ranges, while precipitation exhibited a decreasing trend in spring and an increasing trend in summer. Overall, there was no significant trend in annual precipitation over the past century.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Biodiversity Conservation
Javaid M. Dad, M. Muslim, Irfan Rashid, Zafar A. Reshi
Summary: The study analyzed the climate variability and trends in the Kashmir Himalaya region from 1980 to 2017, showing significant increasing trends in temperature across the region with non-significant positive trends in precipitation, with variations observed in different seasons. The changing precipitation patterns could have significant implications on the ecological sustainability and food security of the region.
ECOLOGICAL INDICATORS
(2021)
Article
Meteorology & Atmospheric Sciences
Azfar Hussain, Jianhua Cao, Shaukat Ali, Sher Muhammad, Waheed Ullah, Ishtiaq Hussain, Mobeen Akhtar, Xiuqin Wu, Yinghui Guan, Jinxing Zhou
Summary: Long-term precipitation monitoring is important for water resource management and disaster prevention. This study assessed the trends in seasonal and annual precipitation in Pakistan from 1960 to 2016 and found that, overall, there was an increasing trend in precipitation. However, there were also regional and seasonal variations in the trends, with some areas experiencing a decrease in precipitation.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Zekai Sen
Summary: In this paper, a new trend methodology is proposed based on the characteristics of crossings along any given straight line within the given time series. It does not require any restrictive assumptions and provides a series of trends at different levels within the variation range of the time series. The methodology is compared with a classical trend determination method and applied to data from the Danube River and Turkey.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Environmental Sciences
Yilinuer Alifujiang, Jilili Abuduwaili, Yongxiao Ge
Summary: This study investigated the temporal patterns of river runoff data in the Lake Issyk-Kul basin in Central Asia and found various significant increasing and decreasing trends in different time series. The innovative trend analysis (ITA) method was effective in identifying these trends, compared to the Mann-Kendall (MK) trend test. The study revealed the seasonal variations in river runoff data and highlighted the importance of evaluating different values in analyzing trends.
Article
Engineering, Civil
Kemal Saplioglu, Yavuz Selim Guclu
Summary: This study proposes a method for trend analysis based on time series data. The data is divided into equal parts and the Wilcoxon Signed Rank Test and Mann-Kendall test are applied to determine the trends. A case study on water discharge time series at different stations in Turkey reveals that 8 out of 12 stations show no trend at the 95% confidence interval, while the others exhibit various trends.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Isabel Boavida, Maria Joao Costa, Maria Manuela Portela, Francisco Godinho, Jeffrey Tuhtan, Antonio Pinheiro
Summary: Hydropeaking caused by small-scale hydropower plants can cause stress in fish and negatively impact fish communities. However, fish refuges have been found to successfully mitigate the effects of hydropeaking, although their use may depend on the flow regime.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Chemistry, Analytical
Jacek Baranczuk, Martina Zelenakova, Hany F. Abd-Elhamid, Katarzyna Baranczuk, Salem S. Gharbia, Peter Blistan, Cecil J. W. Meulenberg, Peter Kumer, Wlodzimierz Golus, Maciej Markowski
Summary: The authors compared data from two different types of rainfall sensors and found that actual precipitation is higher and strongly correlated with climatic precipitation (r = 0.99). Using the introduced coefficient, it is possible to determine the full-year actual precipitation with high probability, which is of great importance in the calculation of the water balance.
Article
Environmental Sciences
Katarzyna Kubiak-Wojcicka, Patrik Nagy, Agnieszka Pilarska, Martina Zelenakova
Summary: This study examines the trends in air temperature, precipitation and flow rates over a 50-year observation period (1961-2010) and compares two periods, 1961-1985 and 1986-2010. The study found a significant increase in air temperature from 1961 to 2010, as well as an upward trend in precipitation in June from 1986-2010.
Article
Chemistry, Multidisciplinary
Marian Marcis, Marek Frastia, Lidovit Kovanic, Peter Blistan
Summary: The results of this study can provide guidance for selecting a reliable camera network when using structure from motion photogrammetry to document cultural heritage objects. Structure from motion photogrammetry is commonly used for archaeological site documentation. The study examined the changes in the geometry of point clouds obtained with different camera network configurations during the digitization of Saint James's Chapel in Bratislava. The analysis compared the photogrammetric variants with terrestrial laser scanning. The findings caution against sacrificing image recording efficiency, as insufficient connections between image blocks can significantly reduce relative accuracy below 1:1000.
APPLIED SCIENCES-BASEL
(2023)
Article
Environmental Sciences
Hany F. Abd-Elhamid, Martina Zelenakova, Jacek Baranczuk, Marcela Bindzarova Gergelova, Mohamed Mahdy
Summary: The study aims to analyze the historical trend and predict the shoreline changes of the Nile Delta coasts. DSAS software and GIS environment were used to monitor the changes and forecast future changes. The results indicate that coastal erosion will continue to occur, particularly in the Rosetta and Damietta sections.
Article
Environmental Sciences
Hazem M. Eldeeb, Ali Ibrahim, Magdy H. Mowafy, Martina Zelenakova, Hany F. Abd-Elhamid, Katarzyna Pietrucha-Urbanik, Mahmoud T. Ghonim
Summary: The study investigates the impact of the failure of the Grand Ethiopian Renaissance Dam (GERD) on downstream countries using HEC-RAS. Outflow hydrographs and flood inundation maps were provided through a hypothetical dam break scenario. The study finds that the breach outflow discharge increases with the breach dimension, while the peak discharge decreases with increasing breach formation time.
Article
Environmental Sciences
Ibrahim Hendy, Martina Zelenakova, Katarzyna Pietrucha-Urbanik, Yasser Salama, Mohamed Abu-hashim
Summary: Vertical-flow constructed wetlands (VFCWs) are effective for wastewater treatment in rural areas, and the use of Paulownia trees can enhance their efficiency. Real wastewater was used to evaluate the treatment performance of VFCWs, and the results showed significant reductions in both COD and BOD5 levels. Both Paulownia and Phragmites Australis can effectively reduce the levels of COD and BOD5 in the effluent.
Article
Environmental Sciences
Hossam H. H. Elewa, Ahmed M. M. Nosair, Martina Zelenakova, Viktoria Mikita, Nermeen A. A. Abdel Moneam, Elsayed M. M. Ramadan
Summary: This study examined the sustainability and recharge mechanisms of the aquifer system in El-Qaa Plain through mathematical flow modeling, hydrochemical composition, environmental isotopic signature, watershed modeling system, and remote sensing tools. The results showed that the integration of runoff water harvesting facilities and additional production wells can enhance groundwater recharge and increase water levels, which is crucial for water resources management in arid regions.
Article
Environmental Sciences
Hakan Varcin, Fatih Uenes, Ercan Gemici, Martina Zelenakova
Summary: This article presents a three-dimensional CFD model and OpenCV code for spillway studies. The model was validated by comparing the flow characteristics with experimental data. The study also developed a technique based on image processing to calculate water velocity and depth. The results showed good agreement between the model predictions and experimental measurements. The developed OpenCV-Python code provided an accurate estimation of water flow velocity and depth.
Article
Environmental Sciences
Riham Ezzeldin, Martina Zelenakova, Hany F. Abd-Elhamid, Katarzyna Pietrucha-Urbanik, Samer Elabd
Summary: A novel two-hybrid optimization model combining particle swarm optimization (FAPSO) and firefly algorithm with genetic algorithm (FAGA) is proposed to improve the performance of the conventional firefly algorithm in the least cost design of water distribution networks. The models are tested on benchmark networks and a real case study, and their performance is evaluated based on multiple criteria. The results show that the FAGA model outperforms the standard firefly algorithm and FAPSO model in terms of exploring the search space, exploiting promising areas, and converging to the optimal solution, making it a reasonable optimization technique for managing water distribution networks.
Article
Environmental Sciences
Bestami Tasar, Fatih Unes, Ercan Gemici, Martina Zelenakova
Summary: Regulation structures such as submerged vane are necessary to mitigate environmental damage caused by increased flooding in rivers. This study experimentally investigated the effect of 3-array submerged vane structures on flow velocities near the outer bank. Results from computational fluid dynamics (CFD) were verified and found to closely match the experimental results. The 3-array submerged vane with a 3-vane structure reduced flow velocities by 16-27% behind the vane, and the mean velocity along the depth decreased by 14-21%.
Review
Chemistry, Multidisciplinary
Ludovit Kovanic, Branislav Topitzer, Patrik Petovsky, Peter Blistan, Marcela Bindzarova Gergelova, Monika Blistanova
Summary: Using unmanned aerial vehicles (UAVs) combined with various sensors allows for fast, automatic, and contactless collection of spatial data with high resolution and accuracy. The most common application is the creation of spatial models based on photogrammetric and lidar data. This review analyzes the current possibilities of UAVs and provides an overview of their history, development, classification, regulation, and application in surveying.
APPLIED SCIENCES-BASEL
(2023)
Article
Environmental Studies
L'udovit Kovanic, Martin Stroner, Rudolf Urban, Peter Blistan
Summary: There are numerous talus cones in the Small Cold Valley, Slovakia, formed by long-term geological processes and sudden hydrological events. Due to recent rock avalanches and landslides, the safety of frequent hiking trails in this area needs to be monitored. A complex methodology using non-contact UAS photogrammetry with SfM-MVS processing was developed to monitor changes in the talus cones and evaluate the extent, pace, nature, and origin of the morphological changes. Comparing the actual state of a talus cone in 2018 and 2022, significant morphological changes were observed using spatial models represented by point clouds with centimeter-level accuracy. Geodetic and geological knowledge was synthesized to evaluate the phenomena occurring in this territory.
Article
Engineering, Multidisciplinary
Ludovit Kovanic, Martin Stroner, Peter Blistan, Rudolf Urban, Rudolf Boczek
Summary: The geometric parameters of large-scale machinery are checked using traditional geodetic and measuring methods. For a rotary kiln (RK), the focus is on determining its real longitudinal axis geometry and shell deformation. The geodetic methods employ total station (TS) or terrestrial laser scanning (TLS) for 3D coordinate measurements. In this research, these methods were used as ground-truth references to evaluate the SfM-MVS approach in 3D modeling and rotary kiln geometry derivation.
Article
Environmental Sciences
Luis Angel Espinosa, Maria Manuela Portela, Laryssa Mariana Moreira Freitas, Salem Gharbia
Summary: This study presents a comprehensive analysis of heatwaves in mainland Portugal and finds an increasing trend in the number of heatwave days, with the capital city Lisbon recording the highest number of heatwave days.