Acta Hydrotechnica最新文献_第2页

Possibility of using waste edible oil for biogas production 利用废弃食用油生产沼气的可能性

Acta Hydrotechnica Pub Date : 2021-12-01 DOI: 10.15292/acta.hydro.2021.10

Sabina Kolbl Repinc

引用次数: 0

One-dimensional sediment transport modelling with Engelund–Hansen and Ackers–White transport equations for the Lower Danube River 多瑙河下游用Engelund-Hansen和Ackers-White输运方程的一维泥沙输运模型

Acta Hydrotechnica Pub Date : 2021-12-01 DOI: 10.15292/acta.hydro.2021.08

Davor Kvočka

{"title":"One-dimensional sediment transport modelling with Engelund–Hansen and Ackers–White transport equations for the Lower Danube River","authors":"Davor Kvočka","doi":"10.15292/acta.hydro.2021.08","DOIUrl":"https://doi.org/10.15292/acta.hydro.2021.08","url":null,"abstract":"Sediment transport can have a negative impact on riparian environments, as it can lead to the deterioration of ecological diversity and increase flood risks. Sediment transport modelling is thus a key tool in river basin management and the development of river training structures. In this study, we examined the appropriateness of 1D modelling for total sediment transport loads using the Engelund–Hansen and Ackers–White transport equations for the Lower Danube River. The study evaluated the effect of sediment grading on the accuracy of 1D model results, the appropriateness of 1D sediment transport modelling within technical or engineering projects, and the appropriateness of the Engelund–Hansen and Ackers–White equations for estimating sediment yield in the area of the Lower Danube River. The model results have been compared to field measurements, with the accuracy of the modelling results being evaluated with statistical tests. The obtained results show: (i) the sediment grading does not have a significant impact on the 1D modelling results, (ii) 1D sediment transport modelling gives sufficiently accurate results for practical engineering use (e.g. the estimation of dredging activities), and (iii) the Engelund–Hansen equation is generally better for sediment transport modelling in the Lower Danube River.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44949422","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}

引用次数: 1

Bibliometric analysis of water footprint research in countries of former Yugoslavia 前南斯拉夫各国水足迹研究的文献计量学分析

Acta Hydrotechnica Pub Date : 2021-11-01 DOI: 10.15292/acta.hydro.2021.07

Libor Ansorge, L. Stejskalová, Dagmar Vološinová

{"title":"Bibliometric analysis of water footprint research in countries of former Yugoslavia","authors":"Libor Ansorge, L. Stejskalová, Dagmar Vološinová","doi":"10.15292/acta.hydro.2021.07","DOIUrl":"https://doi.org/10.15292/acta.hydro.2021.07","url":null,"abstract":"Sustainable development of water resources requires new tools and research in these fields of study. A systematic overview of water footprint research in countries of former Yugoslavia is presented through bibliometric analysis and publication review. The Scopus database was used as the data source. Among the countries of former Yugoslavia, only researchers from Slovenia, Serbia, Croatia, and Bosnia and Hercegovina published papers focused on water footprint research before March 2021. Research on water footprint in these countries was found to be insufficient in scope and intensity. The contribution of authors from the countries of former Yugoslavia is small compared to research in other countries all over the world but is not insignificant. Almost 2/3 of articles have already been cited by other authors. Two main centers of water footprint research are at the University of Maribor in Slovenia and at the University of Novi Sad in Serbia, respectively. The research is focused on the so-called volumetric water footprint, while the LCA water footprint stands outside the interest of the scientific community in countries of former Yugoslavia.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49244134","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}

引用次数: 2

Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity 砂中渗流传热：饱和导水率和孔隙率的影响

Acta Hydrotechnica Pub Date : 2021-06-01 DOI: 10.15292/ACTA.HYDRO.2021.05

Yaser Ghafoori, M. Maček, A. Vidmar, J. Říha, A. Kryzanowski

{"title":"Heat transfer by seepage in sand: Influence of saturated hydraulic conductivity and porosity","authors":"Yaser Ghafoori, M. Maček, A. Vidmar, J. Říha, A. Kryzanowski","doi":"10.15292/ACTA.HYDRO.2021.05","DOIUrl":"https://doi.org/10.15292/ACTA.HYDRO.2021.05","url":null,"abstract":"Heat transfer within the soil is a complex process in the presence of seepage flow. In such conditions, the soil’s thermal behavior is influenced by the thermal and hydraulic properties of the medium as well as the initial conditions and boundary conditions to which the medium is subjected. This paper presents the experimental and numerical studies of heat transfer within the sand subjected to the seepage flow. It focuses on the influence of saturated hydraulic conductivity and the porosity of medium on the heat transfer process. The temperature distribution within the sand was monitored by the optical fiber Distributed Temperature Sensor (DTS). The experiment was performed on three types of silica-dominated sands with different saturated hydraulic conductivities and different Soil Water Characteristic Curve (SWCC). In addition to the experimental study, a coupled hydrothermal numerical model was designed in FEFLOW software and validated by comparing its results with the experimental measurements. To determine the influence of porosity and saturated hydraulic conductivity on heat transfer, we analyzed the numerical models for different values of porosity and saturated hydraulic conductivity. The numerical and experimental studies showed that the thermal velocity is higher in sand with higher saturated hydraulic conductivity and temperature declination occurs more quickly due to the heat convection process. Saturated sand with larger porosity has an overall higher heat capacity, wherefore the temperature declination started later in the measuring points but dropped down lower close to the temperature of the upstream water.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47276730","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}

引用次数: 2

Quartz Sand Use in Hydraulic and Sanitary Engineering 石英砂在水利和卫生工程中的应用

Acta Hydrotechnica Pub Date : 2020-06-01 DOI: 10.15292/acta.hydro.2020.02

Tamara Kuzmanić, M. Mikoš

引用次数: 2

Determining rock armour stability under the stress of wave loading 波浪荷载作用下岩甲稳定性的测定

Acta Hydrotechnica Pub Date : 2019-06-01 DOI: 10.15292/acta.hydro.2019.02

Jerneja Čehovin, Duašn Žagar

引用次数: 0

Optical granulometry of coarse aggregates and sediments 粗集料和沉积物的光学粒度测定法

Acta Hydrotechnica Pub Date : 2019-06-01 DOI: 10.15292/acta.hydro.2019.05

Maja Matič, N. Bezak, Mikoš Matjaž

{"title":"Optical granulometry of coarse aggregates and sediments","authors":"Maja Matič, N. Bezak, Mikoš Matjaž","doi":"10.15292/acta.hydro.2019.05","DOIUrl":"https://doi.org/10.15292/acta.hydro.2019.05","url":null,"abstract":"In order to determine the granularity of the material, image analysis may be used instead of traditional methods such as sieving. Data on granulometry is important in the water management sector for several practical applications, such as calculation of sediment transport capacity in watercourses, design of hydraulic structures, or modeling of debris flows. The WipFrag and Basegrain programs were tested on the case study of the Belca rockfall and the Sava Dolinka River’s gravel bar near the village of Mojstrana. In both cases, multiple images were taken from different heights and sieve analysis was performed. The results of both programs were compared with the results of the sieving analysis. The results showed that WipFrag yielded more comparable results with the sieving analysis than Basegrain. WipFrag gave slightly better results in the case of the Belca rockfall than in the case of the river gravel bar. The Basegrain program, on the other hand, produced similarly comparable results in both case studies. In most cases, both programs underestimated the grain size compared to the results of the sieving analysis. In some cases, the relative differences were close to 100%. On the other hand, the selected statistical test did not show a statistically significant difference between the results of the sieving analysis and the results of the image analysis in both of the programs. Optimal image analysis results were obtained from images taken from the height of about 1.5-2 m, which means that we suggest that photos of aggregates, fluvial sediments, and erosion material should be taken from a height of approximately ten times the maximum grain size.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45396081","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}

引用次数: 1

Static analysis of a high arch dam 某高拱坝的静力分析

Acta Hydrotechnica Pub Date : 2019-06-01 DOI: 10.15292/acta.hydro.2019.04

Yaser Ghafoori, A. Kryzanowski, D. Zupan

引用次数: 0

Influence of calculation criteria on the values of low-flow recession constants in a non-homogenous catchment in Slovenia 计算标准对斯洛文尼亚非均匀集水区低流量衰退常数值的影响

Acta Hydrotechnica Pub Date : 2019-06-01 DOI: 10.15292/ACTA.HYDRO.2019.01

Klaudija Sapač, S. Rusjan, M. Šraj

{"title":"Influence of calculation criteria on the values of low-flow recession constants in a non-homogenous catchment in Slovenia","authors":"Klaudija Sapač, S. Rusjan, M. Šraj","doi":"10.15292/ACTA.HYDRO.2019.01","DOIUrl":"https://doi.org/10.15292/ACTA.HYDRO.2019.01","url":null,"abstract":"In this paper we analyse the influence of three different calculation criteria on the values of low-flow recession constants, namely the influence of the calculation method, recession curve segment length (4, 5, 6, or 7 days) and of the selected period (whole period, monthly, seasonally) for the calculation of the initial discharge, which determines the threshold on the falling limb of the hydrograph for the recession analysis. The analysis is based on daily discharge data of 11 gauging stations in the hydrogeologically non-homogenous Ljubljanica River catchment. For each of the stations, we calculated 24 values of recession constants using a different combination of criteria. Based on these values we determined the influence of each criterion on the final result using statistical tests and graphical approaches. Analysis showed that the recession constants calculated using various methods are statistically significantly different for all gauging stations. The recession constants obtained using the individual recession segment method (IRS) are on average 3.1 days higher than those calculated using the master recession curve method (MRC). The influence of the other two criteria, namely the length of the segment and the period for calculating the initial discharge, is not so obvious, since it is most likely conditioned by catchments’ characteristics influencing the time dynamics of the runoff.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41841996","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}

引用次数: 6

Future needs for energy storage in the Alpine region 阿尔卑斯地区未来对能源储存的需求

Acta Hydrotechnica Pub Date : 2019-06-01 DOI: 10.15292/acta.hydro.2019.03

M. Hočevar, L. Novak, Gašper Rak

{"title":"Future needs for energy storage in the Alpine region","authors":"M. Hočevar, L. Novak, Gašper Rak","doi":"10.15292/acta.hydro.2019.03","DOIUrl":"https://doi.org/10.15292/acta.hydro.2019.03","url":null,"abstract":"In this paper we discuss energy storage requirements for EUSALP region in Europe. EUSALP is an Alpine region that includes the entirety Switzerland, Austria, Slovenia, and Lichtenstein, as well as parts of France, Germany, and Italy. A model is presented that facilitates the estimation of the required technical amounts of energy storage and installed power of pumped storage hydropower plants. The aim of the model is to estimate the requirements of energy storage to assist in setting guidelines for stable and reliable future electric energy supply in the EUSALP region. The model is based on currently known patterns of energy consumption and generation and available information on the future increase of renewable electric generation capacity, energy consumption, and the introduction of electromobility within all EUSALP regions. The hourly balance of generation, demand, and storage within a selected future year is assumed. The results are presented such that a mix of scenarios is addressed. Among them are installed generation capacity, installed pumped hydro storage power, selection of photovoltaic and wind electric energy generation ratio, the charging of a selected percentage of electric cars, flexible run-of-river hydro electric energy generation, import/export, generation by nuclear and backup fossil fuel sources, and a selection of disturbances. Results show that energy storage capacities must be increased by a large margin regardless of the choice of demand site management strategies or flexible electric car charging. Around a requisite 10-fold increase in pumped storage hydropower capacity is estimated, while the estimated increase in required energy storage is even higher. Daily and seasonal variations are also discussed. Further, the amount of surplus electric energy generation is presented and discussed.","PeriodicalId":36671,"journal":{"name":"Acta Hydrotechnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41877379","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}

引用次数: 2