Journal of Hydro-environment Research最新文献

Spatial and temporal variations in temperature and precipitation trends in South Korea over the past half-century (1974–2023) using innovative trend analysis 利用创新趋势分析法分析过去半个世纪（1974-2023 年）韩国气温和降水趋势的空间和时间变化

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-11-17 DOI: 10.1016/j.jher.2024.11.002

Ghani Rahman , Jin-Young Kim , Tae-Woong Kim , Moonhyung Park , Hyun-Han Kwon

{"title":"Spatial and temporal variations in temperature and precipitation trends in South Korea over the past half-century (1974–2023) using innovative trend analysis","authors":"Ghani Rahman , Jin-Young Kim , Tae-Woong Kim , Moonhyung Park , Hyun-Han Kwon","doi":"10.1016/j.jher.2024.11.002","DOIUrl":"10.1016/j.jher.2024.11.002","url":null,"abstract":"<div><div>This study analyzed temperature and precipitation from 60 meteorological stations during a half-century (1974–2023) using the Innovative Trend Analysis (ITA) to explore the spatial and temporal trends across South Korea. The ITA illustrated the trends graphically, and the Mann-Kendall (MK) test added statistical significance to these findings, allowing us to better understand climate changes over the past five decades. The ITA analysis showed a statistically significant monotonic warming trend in temperature at nearly all of the stations. While annual and seasonal changes were found to be substantial, the most relative increases were reported during the spring and summer months. There were quite clear spatial and seasonal differences in precipitation trends. The Han River and Jeju Island areas showed significant increases in precipitation during summer and autumn, which may be associated with intensified monsoonal activity. Our findings revealed a consistent warming signal in all regions and significant regional climate variability. The observed temperature increases, especially in the spring season, are likely to have significant impacts on crop yield and altered growing season due to increased heat stress, increased water demand for various activities affecting water resources, heightened risks to public health from heatwaves and broader impacts on societal well-being such as increased energy demands as well as economic costs associated with climate adaptation measures. The complex precipitation patterns revealed the influence of regional topography and oceanic drivers in modulating climate variability in South Korea, which differs from patterns seen in more continental regimes.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"58 ","pages":"Pages 1-18"},"PeriodicalIF":2.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic energy budgets of triple-components in a cylinder wake 圆柱体尾流中三重分量的动能预算

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-11-15 DOI: 10.1016/j.jher.2024.11.001

Kwanho Ree , Jin Hwan Hwang

{"title":"Kinetic energy budgets of triple-components in a cylinder wake","authors":"Kwanho Ree , Jin Hwan Hwang","doi":"10.1016/j.jher.2024.11.001","DOIUrl":"10.1016/j.jher.2024.11.001","url":null,"abstract":"<div><div>The velocity fields of wakes after a cylinder were disintegrated using a conventional triple decomposition method to investigate the kinetic energy transfer mechanism among the mean flow, unsteady wave, and turbulence. Two-dimensional and two-component (2D-2C) velocity fields were measured using particle image velocimetry (PIV) in a rectangular cross-section water tunnel. For analysis, the proper orthogonal decomposition (POD) was applied to the velocity fields, and it was found that the combination of its first two modes constructs the unsteady coherent motion – in other words, wavelike motion within the cylinder wake. The investigation of the kinetic energy budget also revealed that the dissipation in the regime of coherent motion is negligible, as it is in wave propagation, unlike in the regime of turbulence. Furthermore, the turbulence energy produced by coherent waves was significantly smaller than the wave or turbulence energy directly produced by mean flow. Lastly, in conjunction with the kinetic energy budget, the momentum equation can explain the large deformations of mean velocity in more detail. As a result, the importance of negative production and energy transport has been highlighted.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"58 ","pages":"Pages 19-35"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of submergence of sacrificial piles on local scour reduction at a bridge pier under U-type debris jam conditions U 型泥石流堵塞条件下牺牲桩沉入水中对减少桥墩局部冲刷的影响

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-11-01 DOI: 10.1016/j.jher.2024.10.003

Subodh Guragain , Norio Tanaka

{"title":"Effect of submergence of sacrificial piles on local scour reduction at a bridge pier under U-type debris jam conditions","authors":"Subodh Guragain , Norio Tanaka","doi":"10.1016/j.jher.2024.10.003","DOIUrl":"10.1016/j.jher.2024.10.003","url":null,"abstract":"<div><div>A group of non-submerged sacrificial piles placed in front of a bridge pier have a propensity to trap a significant volume of floating debris during river floods, which affects their effectiveness as a scour countermeasure. This problem can be avoided by using short piles such that the tips of the piles lie below the free water surface, also known as submerged piles. However, it will cause the floating debris to accumulate at the pier itself. The current study attempts to ascertain whether or not such trapping of debris with submerged piles is preferable to that by emergent piles from the perspective of local scour protection of the bridge pier. Laboratory flume tests were conducted under uniform, subcritical, steady, and clear-water flow conditions. The ideal submergence value was ascertained by examining submerged sacrificial piles with varying spans (or lengths) with respect to the flow depth. The local scour reduction efficacy of these submerged piles was then compared with non-submerged piles, first without and subsequently with U-type (horseshoe-shaped) debris jams. Results revealed that submerged sacrificial piles spanning 50–60 % of the flow depth provide optimum protection to the pier against local scour, and this was slightly higher than that offered by emergent piles in an identical layout. In addition, submerged sacrificial piles with ideal submergence protected the pier better against local scour than emergent piles under U-type debris jam conditions.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"57 ","pages":"Pages 38-52"},"PeriodicalIF":2.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of the impact of greenhouse rainwater harvesting managed aquifer recharge on the groundwater system in the southern Jeju Island, South Korea: Implication from a numerical modeling approach 评估温室雨水收集管理含水层补给对韩国济州岛南部地下水系统的影响：数值模拟方法的启示

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-10-02 DOI: 10.1016/j.jher.2024.10.002

Min-Chul Kim , Eun-Hee Koh , Chang-Seong Koh , Won-Bae Park

{"title":"Assessment of the impact of greenhouse rainwater harvesting managed aquifer recharge on the groundwater system in the southern Jeju Island, South Korea: Implication from a numerical modeling approach","authors":"Min-Chul Kim , Eun-Hee Koh , Chang-Seong Koh , Won-Bae Park","doi":"10.1016/j.jher.2024.10.002","DOIUrl":"10.1016/j.jher.2024.10.002","url":null,"abstract":"<div><div>Managed aquifer recharge (MAR) is increasingly being adopted worldwide to mitigate groundwater depletion and ensure the sustainability of water resources. Rainwater harvesting (RWH)-MAR can augment aquifer storage and reduce flood damage in rural areas with dense greenhouse facilities. This study has assessed the feasibility of greenhouse RWH-MAR in Namwon agricultural areas in the southern part of Jeju Island, South Korea, by considering the injection rate and location of MAR using a numerical model. The model results showed that groundwater level increases were directly related to the infiltration rate, although spatial differences in head rise were observed owing to the spatial variability of hydraulic conductivity. In addition, installing the RWH-MAR in highland areas (>100 masl) enhanced the water level rise when compared to the expected values, indicating that a higher hydraulic gradient and thick unsaturated zone facilitated more effective MAR outcomes than in lowland areas. To optimize the contribution of source water to the agricultural water demand, placing the RWH-MAR near the pumping well improved the availability of injected rainwater to agricultural wells. This study highlights the importance of designing RWH-MAR schemes considering MAR objectives and the topographic and hydrogeological characteristics of the site.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"57 ","pages":"Pages 1-11"},"PeriodicalIF":2.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drag coefficients and water surface profiles in channels with arrays of linear rigid emergent vegetation 带有线性刚性挺水植被阵列的渠道中的阻力系数和水面剖面

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-10-02 DOI: 10.1016/j.jher.2024.10.001

Antonino D’Ippolito, Francesco Calomino, Attilio Fiorini Morosini, Roberto Gaudio

{"title":"Drag coefficients and water surface profiles in channels with arrays of linear rigid emergent vegetation","authors":"Antonino D’Ippolito, Francesco Calomino, Attilio Fiorini Morosini, Roberto Gaudio","doi":"10.1016/j.jher.2024.10.001","DOIUrl":"10.1016/j.jher.2024.10.001","url":null,"abstract":"<div><div>Although vegetation in watercourses has an important ecological function, from a hydraulic point of view, it increases flow resistance, determinates higher water levels and generates a greater risk of flooding. In engineering practice, to determine water levels, the drag coefficient must be known, whose experimental values, in literature, are provided for uniform or quasi-uniform flow. In this paper, the expression of a drag coefficient, previously proposed by the authors for the case of emergent rigid vegetation arranged in a linear manner, was used to simulate experimental water surface profiles, employing the effective width for the first time. The formula was validated by simulating 26 experimental profiles observed at the University of Calabria, over 1100 points in total, plus 8 published in literature. In some of these applications, the vegetation density was much higher than that for which the drag coefficient expression was derived. For this reason, it is possible to consider a new, wider field of validity for it. The proposed equation is independent of the Reynolds stem number, so that it can be used in natural streams and rivers, provided that viscosity effects can be considered negligible. Finally, some comments are offered on the application of a new formula proposed in literature regarding the computation of the profile when downstream depth is taken as a boundary condition.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"57 ","pages":"Pages 27-37"},"PeriodicalIF":2.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-time prediction of the week-ahead flood index using hybrid deep learning algorithms with synoptic climate mode indices 利用混合深度学习算法和同步气候模式指数实时预测一周前的洪水指数

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-09-25 DOI: 10.1016/j.jher.2024.09.001

A.A. Masrur Ahmed , Shahida Akther , Thong Nguyen-Huy , Nawin Raj , S. Janifer Jabin Jui , S.Z. Farzana

{"title":"Real-time prediction of the week-ahead flood index using hybrid deep learning algorithms with synoptic climate mode indices","authors":"A.A. Masrur Ahmed , Shahida Akther , Thong Nguyen-Huy , Nawin Raj , S. Janifer Jabin Jui , S.Z. Farzana","doi":"10.1016/j.jher.2024.09.001","DOIUrl":"10.1016/j.jher.2024.09.001","url":null,"abstract":"<div><div>This paper aims to propose a hybrid deep learning (DL) model that combines a convolutional neural network (CNN) with a bi-directional long-short term memory (BiLSTM) for week-ahead prediction of daily flood index (<em>I<sub>F</sub></em>) for Bangladesh. The neighbourhood component analysis (NCA) is assigned for significant feature selection with synoptic-scale climatic indicators. The results successfully reveal that the hybrid CNN-BiLSTM model outperforms the respective benchmark models based on forecasting capability, as supported by a minimal mean absolute error and high-efficiency metrics. With respect to <em>I<sub>F</sub></em> prediction, the hybrid CNN-BiLSTM model shows over 98% of the prediction errors were less than 0.015, resulting in a low relative error and superiority performance against the benchmark models in this study. The adaptability and potential utility of the suggested model may be helpful in subsequent flood monitoring and may also be beneficial to policymakers at the federal and state levels.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"57 ","pages":"Pages 12-26"},"PeriodicalIF":2.4,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of climate change and regional water supply capacity on integrated drought risk 气候变化和区域供水能力对综合干旱风险的影响

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-09-01 DOI: 10.1016/j.jher.2024.08.003

Ji Eun Kim , Min Ji Kim , Jeongwoo Han , Tae-Woong Kim

{"title":"The effects of climate change and regional water supply capacity on integrated drought risk","authors":"Ji Eun Kim , Min Ji Kim , Jeongwoo Han , Tae-Woong Kim","doi":"10.1016/j.jher.2024.08.003","DOIUrl":"10.1016/j.jher.2024.08.003","url":null,"abstract":"<div><p>Due to climate change, the frequency and duration of meteorological drought have increased. In addition, local water supply capacity has not met water demand in many regions, which will eventually lead to serious water shortages. To mitigate the effects of drought on sustainable water use, it is necessary to understand how climate change affects regional water supply capacity and drought risk. To this end, this study evaluated the drought response capacity of regional water supply systems and assessed the comprehensive drought risk in terms of drought hazard, vulnerability, and response capacity. To avoid subjectivity in risk analysis, structural equation modeling was used to select primary indicators and probability and statistical methods were used to assign weights to the indicators. The changes in drought risk in different climate change scenarios were assessed using sensitivity analyses. The overall results indicate that the future drought risks in Gyeonggi, Gyeongsang, Chungcheong, Jeolla, and Gangwon are 18, 12, 13, 9, and 10% higher, respectively, than the current risk level. The sensitivity analyses showed that Jinju in Gyeongsang province, which has a high drought response capacity, had the largest decreasing rate in drought risk. The quantified changes in drought risk under future climate change scenarios will be useful for identifying areas with a high drought risk and making decisions about drought mitigation under climate change.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"56 ","pages":"Pages 40-64"},"PeriodicalIF":2.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Runoff prediction based on the IGWOLSTM model: Achieving accurate flood forecasting and emergency management 基于 IGWOLSTM 模型的径流预测：实现准确的洪水预报和应急管理

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-08-22 DOI: 10.1016/j.jher.2024.08.002

Li-Ling Peng , Hui Lin , Guo-Feng Fan , Hsin-Pou Huang , Wei-Chiang Hong

{"title":"Runoff prediction based on the IGWOLSTM model: Achieving accurate flood forecasting and emergency management","authors":"Li-Ling Peng , Hui Lin , Guo-Feng Fan , Hsin-Pou Huang , Wei-Chiang Hong","doi":"10.1016/j.jher.2024.08.002","DOIUrl":"10.1016/j.jher.2024.08.002","url":null,"abstract":"<div><p>With the acceleration of global climate change and urbanization, the frequency and impact of flood disasters are increasing year by year, making flood emergency management increasingly crucial for safeguarding people’s lives, property, and societal stability. To enhance the accuracy of river flow prediction, this study employs an Improved Gray Wolf Optimization Algorithm (IGWO) to optimize parameters of the Long Short-Term Memory Network (LSTM) model. Experimental results demonstrate that the proposed algorithm significantly improves the accuracy of river flow prediction, achieving higher precision and better generalization compared to traditional machine learning algorithms. This method provides more reliable data support for flood warning systems, aiding in the accurate prediction of flood occurrence timing and intensity, thereby providing scientific basis for flood prevention and mitigation efforts. Moreover, this approach supports hydro-logical research, enhancing understanding of river water cycle processes and ecosystem changes.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"56 ","pages":"Pages 28-39"},"PeriodicalIF":2.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing non-newtonian fluid modeling: A novel extension of the cross flow curve model 加强非牛顿流体建模：横流曲线模型的新扩展

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-08-18 DOI: 10.1016/j.jher.2024.08.001

Keivan Kaveh , Andreas Malcherek

{"title":"Enhancing non-newtonian fluid modeling: A novel extension of the cross flow curve model","authors":"Keivan Kaveh , Andreas Malcherek","doi":"10.1016/j.jher.2024.08.001","DOIUrl":"10.1016/j.jher.2024.08.001","url":null,"abstract":"<div><p>A number of viscosity and flow curve models can be used to numerically investigate the non-Newtonian behavior of fluids. Although particle size, grain size distribution and concentration play a crucial role in determining the viscosity and flow behavior of suspensions and colloidal systems, they are either ignored or considered indirectly in almost all models. We present a mathematical extension of the widely used Cross flow curve model to account for the effect of concentration and particle size in modeling viscosity and flow curves. In particular, this study takes into account a variable total number of individual particles in unit volume, which is assumed to be constant in other models. The proposed extension allows the flow curve to model suspensions that are typically shear-thinning but can also be Newtonian, or shear-thickening for at different shear rates and concentrations. These considerations provide insight into studying and designing suspensions, colloidal systems, and other complex fluid–solid interactions.</p></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"56 ","pages":"Pages 17-27"},"PeriodicalIF":2.4,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1570644324000418/pdfft?md5=9b18b482be513a6e7e882c767b78cb91&pid=1-s2.0-S1570644324000418-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Self-aeration on large dam spillways during major floods” [J. Hydro-Environ. Res. 54 (2024) 26–36] 对 "大洪水期间大型水坝溢洪道的自曝气 "的更正[J. Hydro-Environ. Res. 54 (2024) 26-36]

IF 2.4 3区环境科学与生态学

Journal of Hydro-environment Research Pub Date : 2024-08-03 DOI: 10.1016/j.jher.2024.07.001

Hubert Chanson

引用次数: 0