Acta Hydrologica Slovaca最新文献

{"title":"Water erosion mapping using several erosivity factors in the Macta Basin (North-West of Algeria)","authors":"Khadidja Semari, Khaled Korichi","doi":"10.31577/ahs-2023-0024.01.0012","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0012","url":null,"abstract":"The quantification of the water erosion using empirical models has been applied for several regions around the world. Indeed, the model proposed by Wischmeier and Smith also called RUSLE model remains the most used approach. The main purpose of this work is to produce a soil losses vulnerability map of the Macta Basin and to determine its water erosivity potential, taking into account four rainfall erosivity indices that have been widely applied in the Mediterranean regions namely: Arnoldus index, MFI Modified Fournier Index, Roose index and Rango-Arnoldus index. The calculation of soil losses with the RUSLE model gives respectively the values: 7.94, 13.98, 12.5 and 20.6 t ha -1 year -1 . By comparing with other basins of the same characteristics, we note a good correlation.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of areas with potential significant flood risk using specialized software in the Vistula river basin within Ukraine","authors":"M. Martyniuk, V. Ovcharuk","doi":"10.31577/ahs-2023-0024.01.0011","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0011","url":null,"abstract":"In the period of climate change, the frequency of extreme hydrological phenomena increases, therefore, an extremely important problem in the hydrological study of the territory is the determination of areas with potentially significant risks of flooding, as well as the construction of maps of threats and risks of flooding. The basin of the Vistula river within Ukraine, located in the west of Ukraine, is in a zone of sufficient moisture and suffers from floods almost every year. A significant problem of the hydrological study of this basin is the identification of areas with potential significant flood risks, as well as the creation of flood hazard and risk maps. The paper presents the methodological principles and algorithm for using the HEC-RAS software in modeling the flooded territory with the corresponding calculated characteristics of the maximum runoff. The resulting maps of areas with potential significant flood risk (APSFR) in the area of Busk are also presented.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126328755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in water balance components of river basins in the Slovak Republic and Ukraine","authors":"P. Pekárová, V. Vyshnevskyi, J. Pekár, P. Miklánek","doi":"10.31577/ahs-2023-0024.01.0013","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0013","url":null,"abstract":"This study examined the long-term changes in water balance in five river basins located in Slovakia and Ukraine. Despite small increase in precipitation between 1961–1990 and 1991–2020, the study found a clear trend of decreasing water discharge, accompanied by an increase in evaporation and a significant decrease in the runoff coefficient. Data from two Slovak rivers and three Ukrainian rivers were used, chosen based on three criteria: the presence of at least two meteorological stations within the river basin, a long-term observation period, and minimal human impact on river runoff. The results of statistical analysis indicate that the Belá river basin in the Tatra Mountains had the smallest decrease in the runoff coefficient (–1.28%). The largest decrease in the runoff coefficient (–34%) was observed in the Sula River catchment area with the smallest altitude and the most eastern location. On average, the runoff coefficient decreased by 14% in studied basins. The study highlights the importance of monitoring water balance changes, particularly in regions where water resources are limited.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130538876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An assessment of the uncertainty of the extremity of flood waves with vine copulas","authors":"R. Výleta, K. Hlavčová, S. Kohnová, T. Bacigál, Anna Liová, J. Szolgay","doi":"10.31577/ahs-2023-0024.01.0010","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0010","url":null,"abstract":"Flood hazard connected with the failure of hydraulic structures and flood risk associated with areas subject to flooding need to be estimated using flood hydrographs. Multivariate statistics of flood wave parameters enable quantitative conclusions about such flood hazards and risks. This study focuses on uncertainties in their estimates using unbounded and bounded marginal distributions of flood durations in the joint modelling of flood peaks, volumes, and durations with vine copulas. We have respected the seasonality of floods by distinguishing between the durations of summer and winter floods. We propose to use the bounded Johnson’s SB distribution to represent the hydrological constraints associated with flood durations. The practical consequences of selecting various unbounded and bounded distributions for modelling flood durations for the joint overall and conditional probabilities of the exceedance of flood peaks, volumes, and durations were demonstrated on data from the Parná River in Slovakia. Differences in modelling joint probabilities due to the tail behaviours of the marginal distributions tested were found. Although these are not critical for practical applications, accepting upper and lower bounds as hydrological constraints improves the quality of the statistical models.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124772602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On future changes in the long-term seasonal discharges in selected basins of Slovakia","authors":"Z. Sabová, S. Kohnová","doi":"10.31577/ahs-2023-0024.01.0009","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0009","url":null,"abstract":"Climate change and its impact on hydrological characteristics is a research topic of increasing interest. Studies that examine historical, current or future changes in hydrological regimes are important for understanding future changes in the water balance and its components. This study analyses changes in long-term discharges in the summer and winter half-year and the baseflow index for eight selected river basins in Slovakia till 2100. For the analysis, data observed from the period 1981–2010 were used to calibrate the HBV-type rainfall-runoff TUW model. To simulate future discharges up to the 2100 horizon, two climate scenarios were used, i.e., the Dutch KNMI and the German MPI. The analysis was performed for four selected periods with a duration of 30 years. The results point to the most significant changes in the increase in long-term seasonal discharges in the winter half-year by 2100. In the future, the summer period will probably be characterised by a reduction in long-term seasonal discharges and decrease in the base flow index in all of the basins analysed.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125721645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the impact of drought on Topľa River discharge seasonality","authors":"W. Almikaeel, Luara Cunha De Almeida, L. Čubanová, A. Šoltész, J. Mydla, Dana Baroková","doi":"10.31577/ahs-2023-0024.01.0008","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0008","url":null,"abstract":"This study examines the effect of drought on the discharge seasonality of the Topľa River from 1988 to 2020. Each year is classified into dry, normal, or wet years using the water-bearing coefficient as a drought index. The Seasonal and Trend decomposition using the Loess time series decomposition method was used to compare discharge patterns between these groups. The results demonstrate a significant impact of drought on the seasonal discharge of the Topľa River, with substantially lower discharge and affected seasonality during dry years. The study findings demonstrate that the impact of the drought is altering the seasonal discharge pattern of the river. This highlights the importance of considering the effects of drought in water management and resource planning, particularly in the face of climate change and increasing water scarcity. These findings provide valuable insights for informing water management policies and practices in the region and can guide future research on the impact of drought on river systems.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127528504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of water temperature changes in the Hron River in the context of expected climate change","authors":"Veronika Bačová Mitková, P. Pekárová, D. Halmová","doi":"10.31577/ahs-2023-0024.01.0007","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0007","url":null,"abstract":"The water temperature is one of the physico – chemical indicator of water quality that plays a crucial role in affecting the biological processes in surface water. In the context of the climate changes, there are also changes in the temperature of the water in the streams. The paper presents an analysis of long-term data of the water temperature in the Hron River at two selected gauging stations: Banská Bystrica and Brehy, during the period of 1962–2020. The analysis was conducted using a long series of water temperature measurements. The aim of the study is to detect whether significant trends occur in the time series of water temperature. The first part of the paper dealt with the trend analyses of monthly and annual water temperature. The following section is focused on determination, investigation and evaluation of 1, 3-, 7-day maximum water temperatures. The impact of rising air temperatures on water temperature is critical for protecting water resources and ensuring water quality. In the last part of the study, the monthly water temperature of the Hron River at two gauging stations was modeled using air temperature. The best for Hron at B. Bystrica was the model: SARIMA(1,0,0)x(0,1,1) 12 + 1 regressor, and for Hron at Brehy the best was the model: SARIMA(1,0,0)x(1,0,2) 12 + 2 regressors, with a high correlation coefficient of 0.983 at B. Bystrica and 0.985 at Brehy. Results showed that a 1°C increase in air temperature caused the water temperature to rise by 0.35°C at Banská Bystrica and 0.57°C at Brehy, while a 3°C increase resulted in a rise of 1.05°C at Banská Bystrica and 1.75°C at Brehy. The study concludes that the SARIMA model can","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"360 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127382905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of water temperature in a small mountain catchment","authors":"P. Sleziak, Martin Jančo, M. Danko","doi":"10.31577/ahs-2023-0024.01.0006","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0006","url":null,"abstract":"Water temperature has a significant effect on the river fauna and flora and changes the quality of the aquatic ecosystem. Water temperature similar to other physical and chemical indicators of water quality enters into the assessment of the ecological status of surface waters in accordance with the requirements of the framework directive on water (RSV EU). Therefore, it is important to monitor it and also to know to what extent it is influenced by other factors. The aim of this work was to evaluate the short-term water temperature development and also to analyse its regime with respect to influencing factors, especially air temperature and altitude. The study is conducted in the foreland and mountain part of the Jalovecký Creek catchment in Slovakia and uses hourly data from the hydrological year 2022 (November 1, 2021 – October 31, 2022). We performed field water temperature measurements along the entire Jalovecký creek (six sites at altitudes from 560 to 1,110 m a.s.l.) to better evaluate the water temperature regime. Seasonality of water temperature was analyzed by statistical analysis of time series. We used scatter-plots to assess the relationship among water temperature, air temperature and altitude. The analysis of the water temperature measurements showed that the highest mean hourly/daily water temperature was recorded at Ondrašová site (22.3°C/18.3°C), and the lowest was measured at the Hlboká valley (-1.2°C/-1.5°C). This fact resulted both from the altitude of the stations (Ondrašová 560 m a.s.l., Hlboká valley 1,110 m a.s.l.). The lowest mean monthly air temperature was measured in December (-0.2°C), while the highest was observed in July (15.7°C). The highest variations of the mean monthly water temperatures among the studied sites were observed during summer (June – August), when mean monthly temperature range reached even 8.0°C. The relationship between water and air temperature did not differ significantly among the investigated sites. However, the higher correlations were found for higher altitude (i.e., Hlboká valley). The results of the work could contribute to a better understanding of temperature conditions in high mountain streams.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125863589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of seasonal changes of thermal stratification in reservoir for drinking water supply (Slovakia, Turček reservoir)","authors":"Adrián Varga, Y. Velísková, M. Sokáč, V. Sočuvka, P. Mikula","doi":"10.31577/ahs-2023-0024.01.0005","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0005","url":null,"abstract":"Water reservoirs are important source in supplying inhabitants with drinking water of high–quality. In total, there are 8 reservoirs in Slovakia for drinking water supply purpose. The youngest of them is the Turček reservoir located in the middle of Slovakia, which is also the object of this study. In the article, we deal with the thermal stratification in it during 3 seasons (spring, summer, autumn). Based on the analysis of data provided by the operator of the reservoir from its operation start, it came out that the thermal stratification in the reservoir occurs significantly during the summer. In the given hydro–climatic conditions, it starts at the end of April and ends in October. We also analyzed the existence of the thermocline layer, which occurs mainly in the summer, but also in spring and in autumn, but not so significantly and regularly. Thermal stratification can be classified also by Thermocline Strength Index (TSI) that indicates the steepness of the thermocline or the average gradient of the thermocline layer, so the part of the study was focused also to this indicator.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116566845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term forecasting of appearance dates of ice phenomena and freeze-up at the Dnipro Cascade reservoirs by teleconnection indicators","authors":"B. Khrystiuk, L. Gorbachova","doi":"10.31577/ahs-2023-0024.01.0004","DOIUrl":"https://doi.org/10.31577/ahs-2023-0024.01.0004","url":null,"abstract":"Long-term forecasting of the ice regime of water bodies is a difficult task and is still unresolved in the part of improving the accuracy of forecasts. The objective of this paper is the development of the long-term forecasting methods of appearance dates of ice phenomena and freeze-up at the Dnipro Cascade reservoirs by teleconnection indicators. The research was carried out based on the observation data of 38 water gauges, which are located on 6 reservoirs of the Dnipro Cascade. The appearance dates of ice phenomena and freeze-up for the period from the observation beginning at each water gauges to 2020, inclusive, were used. In addition, in the research were also used the information about the teleconnection indicators, namely 34 atmospheric indices, sea surface temperature indices, teleconnection indices and patterns, that are determined by the National Weather Service (NWS) of the National Oceanic and Atmospheric Administration of United States of America (NOAA USA). The long-term forecasting methods of the appearance dates of ice phenomena and freeze-up at the Dnipro Cascade reservoirs were developed by searching for the best correlation or regression relationship between dates and teleconnection indicators. The probabilities of acceptable error of the developed methods are in the range of 61–72%, which corresponds to the category of \"satisfactory\" assessment of the method quality. It makes it possible to recommend them for use in operational forecasting.","PeriodicalId":321483,"journal":{"name":"Acta Hydrologica Slovaca","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126625700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}