Pub Date : 2025-12-01DOI: 10.1016/j.jher.2025.100690
Dila Demiral , Ismail Albayrak , Jens M. Turowski , Robert M. Boes
Hydro-abrasion is a process of wear resulting from the mechanical stress exerted by impacting particles in the flow on a riverbed or banks or on the invert of hydraulic structures. Hydro-abrasion models represent the mechanics of invert abrasion by bed load particles and allow to predict hydro-abrasion rates. The present study deals with the enhancement of the existing mechanistic saltation hydro-abrasion model by incorporating new equations for particle velocity, hop length, an exponential cover effect term, and two additional important terms accounting for particle hardness and saltation probability, respectively. We particularly focus on the effects of particle and bed lining material hardness, bed cover, and low aspect ratio on hydro-abrasion, which were not holistically investigated in previous studies. The non-dimensional hydro-abrasion coefficient kv (also known as the rock resistance coefficient) in the enhanced model was calibrated using both experimental laboratory data and field measurements obtained from three Swiss Sediment Bypass Tunnels as part of our research project. A constant value of kv = 4.8 ± 2.2 × 104 was obtained for a range of different materials with less scattering compared to the coefficients reported in previous studies. The enhanced model demonstrated a good performance when validated with independent data from laboratory and field studies, indicating that the laboratory results can be upscaled to prototype conditions.
{"title":"Hydro-abrasion processes and modelling at hydraulic structures and steep bedrock rivers: 2. Hydro-abrasion model development and application","authors":"Dila Demiral , Ismail Albayrak , Jens M. Turowski , Robert M. Boes","doi":"10.1016/j.jher.2025.100690","DOIUrl":"10.1016/j.jher.2025.100690","url":null,"abstract":"<div><div>Hydro-abrasion is a process of wear resulting from the mechanical stress exerted by impacting particles in the flow on a riverbed or banks or on the invert of hydraulic structures. Hydro-abrasion models represent the mechanics of invert abrasion by bed load particles and allow to predict hydro-abrasion rates. The present study deals with the enhancement of the existing mechanistic saltation hydro-abrasion model by incorporating new equations for particle velocity, hop length, an exponential cover effect term, and two additional important terms accounting for particle hardness and saltation probability, respectively. We particularly focus on the effects of particle and bed lining material hardness, bed cover, and low aspect ratio on hydro-abrasion, which were not holistically investigated in previous studies. The non-dimensional hydro-abrasion coefficient <em>k<sub>v</sub></em> (also known as the rock resistance coefficient) in the enhanced model was calibrated using both experimental laboratory data and field measurements obtained from three Swiss Sediment Bypass Tunnels as part of our research project. A constant value of <em>k<sub>v</sub></em> = 4.8 ± 2.2 × 10<sup>4</sup> was obtained for a range of different materials with less scattering compared to the coefficients reported in previous studies. The enhanced model demonstrated a good performance when validated with independent data from laboratory and field studies, indicating that the laboratory results can be upscaled to prototype conditions.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"64 ","pages":"Article 100690"},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694526","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jher.2025.100691
Dila Demiral , Ismail Albayrak , Jens M. Turowski , Robert M. Boes
Hydro-abrasion refers to the gradual loss of material on the surface of a solid body, caused by mechanical stress, mainly from the impacts of sediment saltation in flowing water. Hydraulic structures like weirs, spillways, diversion tunnels, and especially sediment bypass tunnels (SBTs) experience significant hydro-abrasion due to high flow velocities and elevated sediment transport rates. The hydro-abrasion process is critical in hydraulic engineering, where material loss can lead to structural damage and costly repairs, and in geomorphology, where it drives bedrock incision and shapes landscape evolution over time. This study aims to advance the knowledge of hydro-abrasion mechanics (part I, present paper) and to enhance a mechanistic saltation hydro-abrasion model (part 2) for predicting river and landscape evolution and hydro-abrasion at hydraulic structures. To this end, hydro-abrasion tests of polyurethane foams and weak mortar mixtures as bed materials were systematically conducted in a 0.20 m wide, 0.7 m deep and 13.5 m long laboratory flume at VAW at ETH Zurich, under supercritical flow conditions. The study investigates the effect of flume width-to-flow depth aspect ratios, approach flow Froude numbers, particle diameter and hardness and sediment supply rate on hydro-abrasion rate and pattern. The focus is on the latter two parameters, which were not previously and systematically investigated in flume studies at low aspect ratios. The abrasion depths were measured using a 3D high precision laser scanner. Results revealed that abrasion rate increases with sediment supply rate with maximum abrasion occurring when sediment transport capacity is reached. Harder sediment leads to higher abrasion rates. Abrasion patterns depend on the aspect ratio, causing the formation of one or two incision channels. Three cover effect functions, namely, linear, exponential, and probabilistic were compared to the data. The exponential cover function provides the best representation of the present data. These findings provide new insights into the physical mechanisms of hydro-abrasion under varying hydraulic, sediment, and bed material conditions. This research contributes to the enhancement of a well-known mechanistic saltation abrasion predictive model by incorporating the proposed hardness and cover equations, which is detailed separately in the accompanying paper as Part 2.
{"title":"Hydro-abrasion processes and modelling at hydraulic structures and steep bedrock rivers: 1. Hydro-abrasion and cover effect","authors":"Dila Demiral , Ismail Albayrak , Jens M. Turowski , Robert M. Boes","doi":"10.1016/j.jher.2025.100691","DOIUrl":"10.1016/j.jher.2025.100691","url":null,"abstract":"<div><div>Hydro-abrasion refers to the gradual loss of material on the surface of a solid body, caused by mechanical stress, mainly from the impacts of sediment saltation in flowing water. Hydraulic structures like weirs, spillways, diversion tunnels, and especially sediment bypass tunnels (SBTs) experience significant hydro-abrasion due to high flow velocities and elevated sediment transport rates. The hydro-abrasion process is critical in hydraulic engineering, where material loss can lead to structural damage and costly repairs, and in geomorphology, where it drives bedrock incision and shapes landscape evolution over time. This study aims to advance the knowledge of hydro-abrasion mechanics (part I, present paper) and to enhance a mechanistic saltation hydro-abrasion model (part 2) for predicting river and landscape evolution and hydro-abrasion at hydraulic structures. To this end, hydro-abrasion tests of polyurethane foams and weak mortar mixtures as bed materials were systematically conducted in a 0.20 m wide, 0.7 m deep and 13.5 m long laboratory flume at VAW at ETH Zurich, under supercritical flow conditions. The study investigates the effect of flume width-to-flow depth aspect ratios, approach flow Froude numbers, particle diameter and hardness and sediment supply rate on hydro-abrasion rate and pattern. The focus is on the latter two parameters, which were not previously and systematically investigated in flume studies at low aspect ratios. The abrasion depths were measured using a 3D high precision laser scanner. Results revealed that abrasion rate increases with sediment supply rate with maximum abrasion occurring when sediment transport capacity is reached. Harder sediment leads to higher abrasion rates. Abrasion patterns depend on the aspect ratio, causing the formation of one or two incision channels. Three cover effect functions, namely, linear, exponential, and probabilistic were compared to the data. The exponential cover function provides the best representation of the present data. These findings provide new insights into the physical mechanisms of hydro-abrasion under varying hydraulic, sediment, and bed material conditions. This research contributes to the enhancement of a well-known mechanistic saltation abrasion predictive model by incorporating the proposed hardness and cover equations, which is detailed separately in the accompanying paper as Part 2.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"64 ","pages":"Article 100691"},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145651897","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}
Pub Date : 2025-09-30DOI: 10.1016/j.jher.2025.100683
Lu Yang , Jingming Hou , Wangyu Luo
A 2D hydrodynamic and mass transport model was developed in this study, focusing on inorganic nutrients in water and utilizing GPU acceleration to improve simulation efficiency. Compared to traditional water environment models, this model is not only capable of simulating the transport processes of key water quality factors, including the nitrogen cycle, phosphorus cycle, dissolved oxygen balance, and chlorophyll α, but also significantly enhances computational efficiency. It was applied to Yanming Lake No.5 under various water flow conditions, using measured data to ensure accuracy. The results indicated that reliable simulations were provided by the model, accurately reflecting changes in water dynamics and quality. Meanwhile, under the same simulation conditions, its computational efficiency was approximately seven times greater than that of CPU devices. As throughput increased, overall water depth and velocity were found to remain stable, while concentrations of water quality factors gradually decreased, primarily affecting the lake’s entrance. Over time, signs of poor nutrient conditions due to eutrophication were noted in the lake. This model enables detailed simulations of the transport of environmental variables and their interactions, serving as a valuable tool for predicting and preventing water pollution.
{"title":"Gpu-enhanced 2D simulation of Yanming lake water environment","authors":"Lu Yang , Jingming Hou , Wangyu Luo","doi":"10.1016/j.jher.2025.100683","DOIUrl":"10.1016/j.jher.2025.100683","url":null,"abstract":"<div><div>A 2D hydrodynamic and mass transport model was developed in this study, focusing on inorganic nutrients in water and utilizing GPU acceleration to improve simulation efficiency. Compared to traditional water environment models, this model is not only capable of simulating the transport processes of key water quality factors, including the nitrogen cycle, phosphorus cycle, dissolved oxygen balance, and chlorophyll α, but also significantly enhances computational efficiency. It was applied to Yanming Lake No.5 under various water flow conditions, using measured data to ensure accuracy. The results indicated that reliable simulations were provided by the model, accurately reflecting changes in water dynamics and quality. Meanwhile, under the same simulation conditions, its computational efficiency was approximately seven times greater than that of CPU devices. As throughput increased, overall water depth and velocity were found to remain stable, while concentrations of water quality factors gradually decreased, primarily affecting the lake’s entrance. Over time, signs of poor nutrient conditions due to eutrophication were noted in the lake. This model enables detailed simulations of the transport of environmental variables and their interactions, serving as a valuable tool for predicting and preventing water pollution.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100683"},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623836","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}
Pub Date : 2025-09-30DOI: 10.1016/j.jher.2025.100681
Muhammad Farhan Ul Moazzam , Ghani Rahman , Sanghyun Kim , Hyun-Han Kwon , Nurullayev Mirolim Nosirovich
Meteorological drought is characterized by prolonged periods of below-average precipitation and is a major environmental hazard that significantly affects agriculture, water resources and ecosystems. Drought assessment and understanding its patterns are important for effective water management and risk mitigation. This study aims to assess the spatiotemporal variability and characteristics of meteorological drought in Northern Thailand from 1980 to 2016, using precipitation and temperature data from 22 meteorological stations provided by the Thai Meteorological Department (TMD). We used the Standardized Precipitation Evapotranspiration Index (SPEI) to identify drought events and analyze their trends using Spearman’s Rho test. Additionally, we applied Run theory to quantify drought characteristics, including duration, severity and intensity. The novelty of this study lies in its comprehensive approach, integrating long-term climate data with advanced statistical methods to assess the impact of rising temperatures on drought frequency. The results revealed significant increasing trend in mean, minimum, and maximum temperatures across most meteorological stations, contributing to frequent drought events. Notably, severe droughts were observed during 1982–1983, 1986–1987, 1991–1993, 1997–1998, 2004–2005, 2009, and 2014–2016. Thus, these SPEI analysis highlights the growing influence of temperature-driven evapotranspiration which lead to soil moisture loss and crop failure. The insights from this study emphasizes on the need of proactive drought risk management and adaptation strategies particularly for agriculture sector. Future research should focus on assessing the socio-economic impacts of drought and developing predictive models for improved mitigation planning.
{"title":"Evaluation of meteorological drought and its characteristics in Northern Thailand from 1980 to 2016","authors":"Muhammad Farhan Ul Moazzam , Ghani Rahman , Sanghyun Kim , Hyun-Han Kwon , Nurullayev Mirolim Nosirovich","doi":"10.1016/j.jher.2025.100681","DOIUrl":"10.1016/j.jher.2025.100681","url":null,"abstract":"<div><div>Meteorological drought is characterized by prolonged periods of below-average precipitation and is a major environmental hazard that significantly affects agriculture, water resources and ecosystems. Drought assessment and understanding its patterns are important for effective water management and risk mitigation. This study aims to assess the spatiotemporal variability and characteristics of meteorological drought in Northern Thailand from 1980 to 2016, using precipitation and temperature data from 22 meteorological stations provided by the Thai Meteorological Department (TMD). We used the Standardized Precipitation Evapotranspiration Index (SPEI) to identify drought events and analyze their trends using Spearman’s Rho test. Additionally, we applied Run theory to quantify drought characteristics, including duration, severity and intensity. The novelty of this study lies in its comprehensive approach, integrating long-term climate data with advanced statistical methods to assess the impact of rising temperatures on drought frequency. The results revealed significant increasing trend in mean, minimum, and maximum temperatures across most meteorological stations, contributing to frequent drought events. Notably, severe droughts were observed during 1982–1983, 1986–1987, 1991–1993, 1997–1998, 2004–2005, 2009, and 2014–2016. Thus, these SPEI analysis highlights the growing influence of temperature-driven evapotranspiration which lead to soil moisture loss and crop failure. The insights from this study emphasizes on the need of proactive drought risk management and adaptation strategies particularly for agriculture sector. Future research should focus on assessing the socio-economic impacts of drought and developing predictive models for improved mitigation planning.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100681"},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221731","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}
The interaction of sedimentation and backwater in the reservoir area after the operation of the reservoir causes the backwater and sedimentation to continuously extend upstream. Studying the variation pattern of backwater length after reservoir sedimentation is of significant importance for assessing the reservoir inundation range. Based on the calculation of backwater after sedimentation at the BDa Reservoir, the variations in the backwater under the delta deposition at the reservoir were revealed. During the flood season, there are two inflection points in the backwater surface profile, occurring respectively near the pivot point and starting point of the delta. The impact of deposition thickness on the rise in backwater elevation is mainly reflected at the topset reach of the delta. Furthermore, the depth calculation formulas of foreset reach, topset reach, and sedimentation-affected reach of the delta deposition were established. Based on these, factors influencing the backwater length under delta deposition were identified as the depth at the dam, the distance from the pivot point to the dam, and the inlet discharge. Then a rapid estimation method for backwater length under delta deposition was proposed and validated. Results provide a rapid estimation of reservoir backwater length, which can prevent the protected projects from being inundated by the reservoir backwater.
{"title":"The variation pattern and estimation method of backwater length at the reservoir of delta deposition","authors":"Kaixuan Wang, Minghui Yu, Yuying Shao, Jinlan Mo, Qianrou Chen","doi":"10.1016/j.jher.2025.100682","DOIUrl":"10.1016/j.jher.2025.100682","url":null,"abstract":"<div><div>The interaction of sedimentation and backwater in the reservoir area after the operation of the reservoir causes the backwater and sedimentation to continuously extend upstream. Studying the variation pattern of backwater length after reservoir sedimentation is of significant importance for assessing the reservoir inundation range. Based on the calculation of backwater after sedimentation at the BDa Reservoir, the variations in the backwater under the delta deposition at the reservoir were revealed. During the flood season, there are two inflection points in the backwater surface profile, occurring respectively near the pivot point and starting point of the delta. The impact of deposition thickness on the rise in backwater elevation is mainly reflected at the topset reach of the delta. Furthermore, the depth calculation formulas of foreset reach, topset reach, and sedimentation-affected reach of the delta deposition were established. Based on these, factors influencing the backwater length under delta deposition were identified as the depth at the dam, the distance from the pivot point to the dam, and the inlet discharge. Then a rapid estimation method for backwater length under delta deposition was proposed and validated. Results provide a rapid estimation of reservoir backwater length, which can prevent the protected projects from being inundated by the reservoir backwater.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100682"},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145528412","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}
Pub Date : 2025-09-30DOI: 10.1016/j.jher.2025.100679
Hubert Chanson
Environmental free-surface flows encompass a wide range of applications in civil and environmental engineering. Hydraulic models, physical and numerical, are developed based upon the fundamental principles of similitude and dimensional analysis, as well as conservation of mass, momentum and energy, to ensure a reliable prediction of full-scale performances. Free-surface flows are modelled using a Froude similitude because gravity effects are important. Practically, the vast majority of free-surface flow models use water and air as in prototype. This constraint implies an invariant Morton number. With a combined Froude and Morton similarity, the Reynolds number is proportional to the mass flux. and it is typically much smaller in the hydraulic model. The difference in Reynolds numbers between model and prototype accounts for potential scale effects in terms of both viscous and capillary processes. It is demonstrated that the Weber number is irrelevant when the Reynolds number is retained. A few hydraulic models used different fluids between models and full-scale applications, and their application is discussed.
{"title":"The Morton number and its importance in free-surface flow modelling","authors":"Hubert Chanson","doi":"10.1016/j.jher.2025.100679","DOIUrl":"10.1016/j.jher.2025.100679","url":null,"abstract":"<div><div>Environmental free-surface flows encompass a wide range of applications in civil and environmental engineering. Hydraulic models, physical and numerical, are developed based upon the fundamental principles of similitude and dimensional analysis, as well as conservation of mass, momentum and energy, to ensure a reliable prediction of full-scale performances. Free-surface flows are modelled using a Froude similitude because gravity effects are important. Practically, the vast majority of free-surface flow models use water and air as in prototype. This constraint implies an invariant Morton number. With a combined Froude and Morton similarity, the Reynolds number is proportional to the mass flux. and it is typically much smaller in the hydraulic model. The difference in Reynolds numbers between model and prototype accounts for potential scale effects in terms of both viscous and capillary processes. It is demonstrated that the Weber number is irrelevant when the Reynolds number is retained. A few hydraulic models used different fluids between models and full-scale applications, and their application is discussed.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100679"},"PeriodicalIF":2.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269146","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}
Pub Date : 2025-09-13DOI: 10.1016/j.jher.2025.100671
H.K. Schreiner, C.D. Rennie, A. Mohammadian
The system of an effluent jet discharged upstream of a sharp open channel bend is investigated using large eddy simulations and particle image velocimetry. Without the jet, three distinct sub-cells of secondary circulation are distinguished by clustering instantaneous vortices: one at the inner bank, which is a characteristic of sharp bends; one in the center; and a counter-rotating outer bank cell. Upon addition of a nonbuoyant submerged transverse jet, the outer bank cell vanishes for a low momentum jet and is driven earlier in the bend for a high momentum jet, the bend’s circulation strength is redistributed from the inner bank cell to the center cell, and the development locations of the secondary circulation cells are shifted toward the inner bank. The inner bank cell develops later, and its development region is constrained to be closer to the inner bank. The center cell develops earlier in the bend, and its development region encompasses the jet vortices. The momentum of the jet influences the distribution of effluent, both by increasing mixing with higher momentum and by advection through the jet-affected secondary circulation.
{"title":"Effect of a nonbuoyant submerged transverse jet on bend secondary circulation","authors":"H.K. Schreiner, C.D. Rennie, A. Mohammadian","doi":"10.1016/j.jher.2025.100671","DOIUrl":"10.1016/j.jher.2025.100671","url":null,"abstract":"<div><div>The system of an effluent jet discharged upstream of a sharp open channel bend is investigated using large eddy simulations and particle image velocimetry. Without the jet, three distinct sub-cells of secondary circulation are distinguished by clustering instantaneous vortices: one at the inner bank, which is a characteristic of sharp bends; one in the center; and a counter-rotating outer bank cell. Upon addition of a nonbuoyant submerged transverse jet, the outer bank cell vanishes for a low momentum jet and is driven earlier in the bend for a high momentum jet, the bend’s circulation strength is redistributed from the inner bank cell to the center cell, and the development locations of the secondary circulation cells are shifted toward the inner bank. The inner bank cell develops later, and its development region is constrained to be closer to the inner bank. The center cell develops earlier in the bend, and its development region encompasses the jet vortices. The momentum of the jet influences the distribution of effluent, both by increasing mixing with higher momentum and by advection through the jet-affected secondary circulation.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100671"},"PeriodicalIF":2.3,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107911","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}
Pub Date : 2025-09-12DOI: 10.1016/j.jher.2025.100680
Muhammad Laraib , Muhammad Waseem , Mudassar Iqbal , Jiaqing Xiao , Tao Yang , Pengfei Shi , Waqas Ul Hussan , Muhammad Atiq Ur Rehman Tariq
This research addresses a critical gap in understanding the complex relationship between anthropogenic activities and drought propagation, acknowledging the growing global concern over water scarcity. It aims to enhance the understanding of anthropogenic drivers influencing drought dynamics by proposing a conceptual framework for assessing their impacts. The proposed framework encompasses hydrological modeling using the SWAT model during both disturbed and undisturbed periods, as well as assessments of meteorological and hydrological droughts. Additionally, it includes a probabilistic analysis utilizing a copula-based approach to evaluate drought propagation probabilities and an assessment of the impacts of anthropogenic activities. The performance of the SWAT model, evaluated using Nash-Sutcliffe Efficiency (NSE) and the Coefficient of determination (R2), yielded values of 0.84 and 0.86 during calibration, and 0.81 and 0.80 during validation. Additionally, the Pettitt test, used to identify streamflow change points, indicated distinct periods of undisturbed and disturbed conditions. Analysis of the Streamflow Drought Index (SDI) revealed that 25.77% of the undisturbed period experienced mild drought, 9.39% moderate drought, and 3.13% severe drought. In contrast, the disturbed period saw 41.67% mild drought, 11.76% moderate drought, and 7.35% severe drought. Moreover, the analysis of drought propagation time revealed that anthropogenic activities significantly influenced variations in hydrological drought (HD) and meteorological drought (MD) during the propagation of HD. The undisturbed period displayed a 46% increase in meteorological drought thresholds and severity levels, while the disturbed period exhibited more substantial variations, ranging from 3% to 64%. These findings have significant real-world implications, highlighting that anthropogenic activities intensify drought risks and alter the natural patterns of drought propagation. Overall, the insights gained from this study can support the development of evidence-based policies and adaptive management practices that enhance drought preparedness and resilience in regions vulnerable to water scarcity.
{"title":"A conceptual framework for impact assessment of anthropogenic activities on drought propagation","authors":"Muhammad Laraib , Muhammad Waseem , Mudassar Iqbal , Jiaqing Xiao , Tao Yang , Pengfei Shi , Waqas Ul Hussan , Muhammad Atiq Ur Rehman Tariq","doi":"10.1016/j.jher.2025.100680","DOIUrl":"10.1016/j.jher.2025.100680","url":null,"abstract":"<div><div>This research addresses a critical gap in understanding the complex relationship between anthropogenic activities and drought propagation, acknowledging the growing global concern over water scarcity. It aims to enhance the understanding of anthropogenic drivers influencing drought dynamics by proposing a conceptual framework for assessing their impacts. The proposed framework encompasses hydrological modeling using the SWAT model during both disturbed and undisturbed periods, as well as assessments of meteorological and hydrological droughts. Additionally, it includes a probabilistic analysis utilizing a copula-based approach to evaluate drought propagation probabilities and an assessment of the impacts of anthropogenic activities. The performance of the SWAT model, evaluated using Nash-Sutcliffe Efficiency (NSE) and the Coefficient of determination (R<sup>2</sup>), yielded values of 0.84 and 0.86 during calibration, and 0.81 and 0.80 during validation. Additionally, the Pettitt test, used to identify streamflow change points, indicated distinct periods of undisturbed and disturbed conditions. Analysis of the Streamflow Drought Index (SDI) revealed that 25.77% of the undisturbed period experienced mild drought, 9.39% moderate drought, and 3.13% severe drought. In contrast, the disturbed period saw 41.67% mild drought, 11.76% moderate drought, and 7.35% severe drought. Moreover, the analysis of drought propagation time revealed that anthropogenic activities significantly influenced variations in hydrological drought (HD) and meteorological drought (MD) during the propagation of HD. The undisturbed period displayed a 46% increase in meteorological drought thresholds and severity levels, while the disturbed period exhibited more substantial variations, ranging from 3% to 64%. These findings have significant real-world implications, highlighting that anthropogenic activities intensify drought risks and alter the natural patterns of drought propagation. Overall, the insights gained from this study can support the development of evidence-based policies and adaptive management practices that enhance drought preparedness and resilience in regions vulnerable to water scarcity.</div></div>","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"62 ","pages":"Article 100680"},"PeriodicalIF":2.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057226","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}
Pub Date : 2025-06-30DOI: 10.1016/j.jher.2025.100669
Ismail Albayrak , Romeo Arnold , Dila Demiral , Mohammadreza Maddahi , Robert M. Boes
{"title":"Corrigendum to “Field monitoring and modelling of sediment transport, hydraulics and hydroabrasion at Sediment Bypass Tunnels”. [J. Hydro-Environ. Res. 55 (2024) 1–19]","authors":"Ismail Albayrak , Romeo Arnold , Dila Demiral , Mohammadreza Maddahi , Robert M. Boes","doi":"10.1016/j.jher.2025.100669","DOIUrl":"10.1016/j.jher.2025.100669","url":null,"abstract":"","PeriodicalId":49303,"journal":{"name":"Journal of Hydro-environment Research","volume":"60 ","pages":"Article 100669"},"PeriodicalIF":2.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010043","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}
Pub Date : 2025-06-30DOI: 10.1016/j.jher.2025.100667
Jeonghun Lee , Eun-Sung Chung , Soohyun Kim , Dongkyun Kim
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