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Self-aeration on large dam spillways during major floods J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-03-16 Hubert Chanson
In a spillway chute flow, the upstream flow is typically non-aerated and the flow becomes self-aerated when the turbulent stresses acting next to the water surface exceeds the combined resistance of gravity and surface tension. The inception region of air entrainment is a rapidly-varied region characterised by the transition from a monophase water to two-phase air–water flow. In this contribution,
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Investigation of turbulent flow induced by particle sedimentation using RIM-PIV J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-03-16 Eiji Harada, Takumi Tazaki, Hitoshi Gotoh
The spatiotemporal structure of the flow field during particle–cloud sedimentation has not been sufficiently investigated. In this study, experiments on the sedimentation process of particle clouds in water are conducted using hydrogel particles with a refractive index similar to that of water as the settling particles. The flow field during the sedimentation process of particle clouds in water is
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Deciphering the effect of variation in slope on flow characteristics in a vertical slot fishway J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-03-01 Hao Yuan, Boyu Chen, Qian Sun, Chunhang Xie, Xiaolong He
The effects of a vertical slot fishway slope (with slope values from 1.5% to 6%) on a flow field are numerically investigated, using a re-normalization group – model. The distribution of the velocity, turbulence kinetic energy (), average energy dissipation rate per unit volume (), and vorticity for different slopes are systemically explored. The results indicate that, with an increase in slope, the
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Spur dike layouts impact on upstream flow conditions during flood wave movement J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-02-29 Shabnam Moghispour, Salah Kouchakzadeh
Despite the widespread application of spur dikes in river training projects, the performance of the structure during flood events and its impacts on unsteady flow conditions have rarely been studied. In this experimental investigation, the influences of twelve unsubmerged unilateral and bilateral spur dike layouts on upstream flow conditions during flood movements were examined. Three hydrographs with
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Experimental study on surface wave interaction with submerged tensioned barriers using IoT image processing J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-02-20 Cheng Bi, Yong Jia Toh, Adrian Wing-Keung Law, Mao See Wu
The present study investigated experimentally the dynamic interactions between surface waves and submerged vertical tensioned barriers with full and partial penetrations. The range of tension for the barrier was set within the flexible membrane regime in the experiments which measurements have not been reported in the literature so far. In addition, an extensive Internet of Things (IoT) system with
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Refined analysis of flood-regional composition under changing environment in the middle reach of Hanjiang River J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-02-19 Pengxin Deng, Changjiang Xu, Jianping Bing, Leizhi Wang, Lingjie Li
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Numerical simulation of the critical hydraulic gradient of granular soils at seepage failure by discrete element method and computational fluid dynamics J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-02-04 Yuqi Li, Liangchen Xu, Zhuyin Ma, Bingbing Ma, Junhao Zhang
Seepage failure is a common problem in engineering, and the calculation and analysis of critical hydraulic gradient are of great significance for the safety and protection of engineering. Based on the principle of discrete element method and computational fluid dynamics, the fluid–solid coupled models were established to study the critical hydraulic gradient and particle loss rate of granular soils
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Combining topography and reflectance indices for better surface water detection J. Hydro-environ. Res. (IF 2.8) Pub Date : 2024-01-10 Yuanming Hu, Jisoo Lee, Kyungrock Paik
Since the Normalized Difference Water Index (NDWI) was proposed, water indices have served as useful tools for surface water detection. However, existing water indices are highly influenced by atmospheric and other environmental conditions and suffer from limited performance, especially in urban areas. At the core of the limitation is the sole dependency on the spectral distribution of reflectance
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Conjugation of deep learning and de noising data methods for short-term water turbidity forecasting J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-12-21 Shahram Mousavi
Water turbidity is a critical index of water quality due to its high correlation with the five main water quality parameters (electrical conductivity, nitrogen, dissolved oxygen, phosphorus, and pH). The exact measurement of water turbidity is a difficult process because many conditions affect the reading of turbidity. Although many researchers applied decomposition-based techniques for preprocessing
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Evaluation of collar efficiency to prevent scouring around cylindrical bridge piers under live bed condition J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-12-02 Mohammad Mashahir, Amir Reza Zarrati, Mojtaba Karimaei Tabarestani
The present study was carried out to experimentally investigate the effect of single and double collar on development of local scouring around cylindrical bridge piers under live-bed condition. The single collar with diameter of 3 times the pier diameter placed on the streambed level and double collars one on the streambed level and one on a lower elevation were used. Tests were conducted with different
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Stream analysis for a sub-catchment of Red River (Vietnam) using isotopic technique and recursive digital filter method J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-11-24 Vo Thi Anh, Ha Lan Anh, Mai Dinh Kien, Vu Hoai, Dang Duc Nhan, U. Saravana Kumar
River streams, in general, comprise of two flows: quick flow and baseflow. The baseflow is closely related to geological catchment properties, and understanding the baseflow contribution to stream flow is very important in the planning of water resources management. The baseflow in a sub-catchment of the Red River in Vietnam was quantified using the isotopic technique, and results were compared with
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Salinity dynamics under different water management plans coupled with sea level rise scenarios in the Red River Delta, Vietnam J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-11-02 Nguyen Thi Hien, Nguyen Hai Yen, Matteo Balistrocchi, Marco Peli, Vu Minh Cat, Roberto Ranzi
In recent years, saltwater intrusion in river estuaries has become more severe and frequent worldwide. The common reasons lie in increasing freshwater withdrawal, river flow regulation and sea level rise due to global warming. In particular, the Red River Delta in northern Vietnam is facing a strong population growth worsening the pressure on freshwater resources for drinking water and irrigation needs
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Reynolds stress anisotropy with higher-order turbulence in flow through rigid emergent vegetation: An experimental study J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-10-17 Pritam Kumar, Aaditya Ojha, Anurag Sharma
The flow turbulence and Reynolds stress anisotropy in flow over the smooth rigid bed with the emergent rigid vegetation in a straight channel have been experimentally investigated. Higher-order turbulence such as turbulent diffusivity, third-order moments of velocity fluctuation, quadrant analysis and flux of turbulence kinetic energy have been analysed. Reynolds stress anisotropy has been investigated
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Long-term analysis of sediment load changes in the Red River system (Vietnam) due to dam-reservoirs J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-10-16 Nguyen Hao Quang, Tran Quoc Viet
The sediment regime of the Red River system, the second largest in Vietnam, has undergone changes since the implementation of dams and reservoirs, with implications for downstream river processes. We analyzed long-term datasets of daily discharge and suspended sediment concentrations collected at key gauging stations downstream of the three main tributaries: HB on the Da River, YB on the Red River
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Laboratory investigations on hydraulic jump characteristics using submerged vanes and adverse slope J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-09-22 Hamidreza Bagheri, Manouchehr Heidarpour, Farzaneh Noghani
Hydraulic jump is a phenomenon with destructive effects on the river bed and downstream the hydraulic structures. This study, based on experimental findings, presents a new method that can be used to prevent the detrimental impacts of the hydraulic jump downstream of hydraulic structures and to design optimal structures. In this empirical research, 135 experiments were conducted in an experimental
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Experimental study on energy dissipation and tailwater wave in two-stage stilling basin with supercritical inflow of low Froude number J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-09-16 Wei Lin, Fu-lin Cai, Chang-hai Han, Kai-wen Yu, Jin-tong Gu
This study investigates the geometric parameters of a two-stage stilling basin; 14 sets of tests were carried out in a horizontal flume with a supercritical inflow of relatively low Froude number (Fr1 = 1.1 ∼ 1.85). The flow pattern, relative amplitude of the tailwater, and energy dissipation ratio were investigated. The two-stage stilling basin led to a hydraulic jump at each stage. Compared to the
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Transverse energy loss slope in meandering channels J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-08-21 Youssef I. Hafez
Limited research has been conducted on transverse energy loss in meandering channels. Previous studies made assumptions regarding a linear vertical profile of transverse velocity and rectangular cross sections with horizontal transverse beds, neglecting the effects of nonlinear transverse velocity profiles and transverse bed slopes that contribute to topographic steering. In this study, a novel expression
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Sedimentation issues of the four major rivers Restoration project in South Korea J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-08-11 Hyoseop Woo, Pierre Y. Julien, Byungman Yoon, Sung-Uk Choi
In 2009, South Korea started a large multi-purpose water project on its four major rivers. The main purposes of the Four Major Rivers Restoration Project (FMRRP), which are directly related to water itself, were: (1) securing water resources to combat water scarcity; (2) reducing flood risks by riverbed dredging and reinforcing levees; and (3) restoring the river's environmental functions. Despite
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Application of boosted tree algorithm with new data preprocessing techniques in the forecasting one day ahead streamflow values in the Tigris basin, Türkiye J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-07-22 Okan Mert Katipoğlu, Metin Sarıgöl
Accurate streamflow forecasting is very useful in water resources management, design of hydraulic structures, and almost all issues related to the use of water and water resources, especially in arid regions that have increased in recent years. Since water is the source of all life and the most important basic element for humanity to continue its life, streamflow prediction studies increase its importance
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On deducing the drag coefficient formula of cylindrical vegetation in non-uniform channel flow J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-07-21 Ji-Kun Han, Wei-Jie Wang, Fei Dong, Jin-Yong Zhao, Wen-Qi Peng, Zhou-Bing Zhu, Fang Zhao, Biao Liu
Research on water flow resistance characteristics in a vegetation environment is a hotspot in environmental fluid research, which is primarily concentrated on the calculation of the vegetation drag coefficient Cd. At present, relatively few studies exist on the resistance characteristics of vegetation under non-uniform flow conditions, resulting in few general expressions for the research of Cd for
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Fusing morphometric characteristics with extreme precipitation indices for identifying the most vulnerable sub-basin at risk of flooding J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-07-21 Dharmaveer Singh, Kunal Karan, Sudhir Kumar Singh, Pankaj Chauhan, Ronny Berndtsson
Fluvial floods are commonly studied as an occurrence at the level of a specific basin and are speculated to be closely related to the basin's morphometry. It is possible to identify and rank sub-basins based on how susceptible they are to fluvial flooding events using morphometric criteria. However, one of the key causes that triggers fluvial flooding is the increase in precipitation extremes and changes
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Effect of flow structures on the transport of gametes in broadcast-spawning sea urchin J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-07-17 Hojung You, Hyoungchul Park, Jin Hwan Hwang
Broadcasted fertilization for the reproduction of invertebrates is accomplished through a complicated interaction between spawned gametes and the surrounding flows. Most gametes encounter each other in the vicinity of the sea urchin body where unique flow structures develop, and so analysis of local flow characteristics allows us to better understand the effect of flow on the fertilization process
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GIS based NRCS-CN modeling of rainfall-runoff in river Thamirabarani sub-basin, Southern India J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-07-04 S. Kaliraj, N. Chandrasekar, K.K. Ramachandran, M. Lalitha
River Thamirabarani sub-basin lies in the southern part of the Western Ghats in the Kanyakumari district of Tamil Nadu, India. The basin’s landforms are formed by swift surficial characteristics with undulated terrains composed of steep-sloped valleys, valley fills, and short-length streams with intensive flows that makes-up site-specific hydro-morphological characteristics. In this study, the GIS-based
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Effect of stagnation period and flow rate on soluble and particulate Pb leaching in copper pipe water distribution systems J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-06-15 Lu Chang, Joseph H.W. Lee
Extremely high lead level in tap water caused by particulates has attracted increasing attention in recent years. Despite extensive research on the role of particulate Pb in water supply systems with lead service lines, little information is available on the role of particulate Pb in copper (Cu) water distribution systems. In this study, the dissolved, colloidal, and particulate lead and copper concentrations
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The effects of a spur dike location in a 90° sharp channel bend on flow field: Focus on anisotropy degree and anisotropy nature J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-05-13 Mojtaba Mehraein, Anton J. Schleiss, Marjan Goodarzi
In this research, the flow features around a spur dike located in a 90˚ sharp channel bend have been studied experimentally in detail. Results showed that the effects of the spur dike on upstream sections increased by increasing α (spur dike location from the beginning of the bend). In addition, by increasing α, the horseshoe vortex (C3) and secondary flow in the channel bend (C1) strengthened. The
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Scour evolution downstream of grade-control structures under unsteady flows: A theoretical analysis J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-04-15 Jessica Di Nardi, Michele Palermo, Fabián A. Bombardelli, Stefano Pagliara
River restoration projects often make use of grade-control structures in order to prevent channel degradation, improve their ecological resources, and regulate floods. The time evolution of localized scour that can occur downstream of grade-control structures represents a crucial component in the design of those projects. This is because erosion processes may undermine the stability of hydraulic structures
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SWAT based Bi-objective framework for improving the degree of consumer satisfaction in urban water allocation system under streamflow uncertainty J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-03-28 Mahdi Moudi, Majid Galoie, Yuan He, Xu Hong, Mohsen Shafei, Artemis Motamedi
A long-term perspective of climate change patterns leads to the strategic management of limited water resources and consequently achieves the maximum level of social satisfaction between the various sectors in a water allocation system. Therefore, this study first adopts Soil &Water Assessment Tool (SWAT) to simulate future climate change patterns [2020–2050 and 2051–2080] under Representative Concentration
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Influence of dyke-type causeway on Urmia Lake (NW Iran); insights from water physico-chemical parameters seasonal (2019) changes J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-03-11 Ali Mohammadi, Georg Schwamborn, Amaneh Kaveh-Firouz, Attila Çiner, Razyeh Lak, Alireza Salehipour Milani, Demet Biltekin
The Urmia Lake in NW Iran, the world’s second-largest hypersaline lake, has been exposed to rapid water level fall in the last two decades due to water resources mismanagement, building up of dams on inlet rivers, and the causeway construction in the lake. This human intervention has divided the lake into northern and southern parts and caused an extreme disturbance in the hydro-chemical and hydrodynamic
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Analysis of the effects of low impact development practices on hydrological components using HSPF J. Hydro-environ. Res. (IF 2.8) Pub Date : 2023-01-12 Hyunji Lee, Hakkwan Kim, Jihye Kim, Sang-Min Jun, Soonho Hwang, Jung-Hun Song, Moon-Seong Kang
The purposes of this study are to propose the new approach for modeling the effectiveness of low impact development (LID) practices using Hydrological Simulation Program-Fortran (HSPF)'s Surface-FTABLE (function table) and to evaluate the impacts of LID application on hydrological components and water balance. LID was simulated using Surface-FTABLE, and changes in hydrological components and water
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Destratification of thermally stratified water columns by air diffusers J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-12-12 Şebnem Elçi, Oğuz Hazar, Nisa Bahadıroğlu, Derya Karakaya, Aslı Bor
This study aims at improving the understanding in order to optimise an aeration system for artificial destratification to control cyanobacteria growth in the reservoirs. Previous applications for artificial destratification in reservoirs were based on installations based on computational methods, where neither the effect of air bubble size and configuration nor the effect of air density in the bubble
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Flood risk analysis and mapping under compound hazards: A copula approach for tropical coastal district of Alappuzha, India J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-12-08 Sneha Binoy, J.P. Jyoma, S. Adarsh, A. Muhammed Siddik, Vahid Nourani, A. Alisha, T. Sreeshma
This study investigates the determination of compound risk under the co-existence of heavy rainfall and water level rise at Alappuzha, a coastal district in Southern Kerala, India using Copulas. In the case of Alappuzha, when the combined action of rainfall and water level rise occurs, the chances of compound flooding is more in and around Vembanad Lake and lower Kuttanad regions. So, the water level
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Retrieval of total suspended solids concentration from hyperspectral sensing using hierarchical Bayesian model aggregation for optimal multiple band ratio analysis J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-11-21 Hui Ying Pak, Adrian Wing-Keung Law, Weisi Lin
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Optimization of best management practices to control runoff water quality in an urban watershed using a novel framework of embedding- response surface model J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-11-19 Masoud Taheriyoun, Asghar Fallahi, Mohammad Nazari-Sharabian, Saeed Fallahi
Best Management Practices (BMPs) are measures implemented to reduce urban runoff volume and pollution load. Determination of a cost-effective selection of BMP combinations is a challenge. In this study, an optimization model was developed to determine the optimal number, location, and type of BMPs with minimum cost and pollution load in the Majidieh catchment in Tehran, Iran. A novel framework was
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Assessment of compound flooding through seamless linkage of coastal hydrodynamic and inland catchment models J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-11-14 Peipei Yang, Adrian,Wing-Keung Law, S. Xu, S.T.V. Sim, H. Chan, D. Chitwatkulsiri, H.H. Loc, K.N. Irvine
Compound flooding refers to the complex interactions among oceanographic, inland (catchment) hydrological, and meteorological processes with anthropogenic factors such as land use changes due to urbanization. To-wit, the impact of higher tide levels, storm surge, and high intensity rainfall events over the inland catchment collectively may result in more extensive flooding than the individual processes
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Two-step daily reservoir inflow prediction using ARIMA-machine learning and ensemble models J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-11-04 Akshita Gupta, Arun Kumar
The reservoirs play a crucial role in the development of civilisation as they facilitate the storage of water for multiple purposes like hydroelectric power generation, flood control, irrigation, and drinking water etc. In order to effectively meet these multiple purposes, the knowledge of the inflow in the reservoir is essential. Apart from the historical data, future prediction of the inflows is
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A novel grid generation method based on multi-resolution data fusion for 2D shallow water models J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-10-07 Yongyong Ma, Jingming Hou, Jie Chai, Tian Wang, Wei Liu, Bingyao Li, Nie Zhou, Lu Yang
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Experimental investigation of the diameter and length effects of the dendritic, bottomless, extended structure on reservoir sediment removal efficiency by flushing J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-09-28 Hadi Haghjouei, Majid Rahimpour, Kourosh Qaderi, Sameh A. Kantoush, Sepideh Beiramipour
Sedimentation in front of a dam is the main obstacle against reservoir sustainability. Due to the limited availability of suitable new dam sites, the ramifications of inefficient sediment management are associated with socio-economic concerns and environmental issues. Most of the existing sediment management techniques are unfavorable for arid and semi-arid regions due to their impacts on available
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Pressure Driven analysis of water distribution systems for preventing siphonic flow J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-09-08 Wael Mohamed Hamdy Khadr, Mohammed Magdy Hamed, Mohamed Salem Nashwan
The analysis of the water distribution network is complicated and requires several assumptions to simplify its problem definition. Demand Driven Analysis (DDA) is typically used to analyse the network assuming that all network nodes can deliver the required demand regardless of the available pressure. In the case of analysing an existing network under deficit condition such as pipe breakage or extra
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Mapping of coastal surface chlorophyll-a concentration by multispectral reflectance measurement from unmanned aerial vehicles J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-09-01 S.N. Chan, Y.W. Fan, X.H. Yao
In subtropical coastal waters, the explosive growth of phytoplankton under favorable conditions can lead to water discolouration and massive fish kills. Manual field sampling and laboratory analysis of chlorophyll-a concentration (Chl-a) as an indicator to algal biomass, is resources intensive and time consuming, delaying responses to disastrous harmful algal blooms. Cloudy weather often precludes
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A novel pre-dilution, swirling jet diffuser to enhance effluent mixing: Hydrodynamics and dilution performance J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-09-06 Xinzai Peng, Yiying He, Yijun Zhao, Wenming Zhang
Diffusers are widely-used to quickly dilute effluents in receiving water bodies. This study proposed a novel diffuser that pre-mixes effluent with ambient water before discharging and that uses the swirling jet to further enhance near-field dilution. The nozzle of the diffuser was examined in two ambient flow conditions: co-flow and counter-flow that are commonly-met in the environment such as oceans
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Flow over embankment gabion weirs in free flow conditions J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-08-18 Roya Biabani, Farzin Salmasi, Meysam Nouri, John Abraham
In this study, a series of laboratory tests were performed to investigate the effects of side ramp slope, crest length, and porous media properties on the flow regimes, water-surface profiles, discharge coefficients, and energy dissipation in embankment gabion weirs with upstream and downstream slopes. 24 physical models of solid and gabion weirs with three different upstream/downstream slopes (90°
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Mean flow, secondary currents and bed shear stress at a 180-degree laboratory bend with and without enhanced permeable groins as an Eco-friendly river structure J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-25 Manoochehr Shokrian Hajibehzad, Mahmood Shafai Bejestan, Vito Ferro, Rahim Avarand
River restoration aims to apply environmentally-friendly structures for bank protection in meandering rivers to restore their natural habitat. Enhanced Permeable Groin (EPG) is a novel river restoration technique that can improve the fish habitat environment in a river system by creating a series of eco-friendly scour pools. This study reports the results of two groups of 3D velocity measurements in
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Air flow inside a vertical pipe induced by a free-falling water jet J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-25 Yiyi Ma, Pengcheng Li, David Z. Zhu, Abdul Khan
The air flow induced by a water jet freely falling inside a vertical pipe with its top and bottom both open to the atmosphere was investigated experimentally and numerically. In the experiments, the radial air velocity distribution and the air pressure variation along the vertical pipe were measured. The air drag of the falling water jet was related to the jet surface disturbance and analyzed by introducing
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A statistical approach to multisite downscaling of daily extreme temperature series: A case study using data in Bangladesh J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-28 Mahzabeen Rahman, Van Thanh Van Nguyen
Downscaling techniques are required to describe the linkages between Global Climate Model outputs at coarse-grid resolutions to surface hydrologic variables at relevant finer scales for climate change impact and adaptation studies. In particular, several statistical methods have been proposed in many previous studies for downscaling of extreme temperature series for a single local site without taking
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Monitoring water level and volume changes of lakes and reservoirs in the Yellow River Basin using ICESat-2 laser altimetry and Google Earth Engine J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-26 Cong Liu, Ronghai Hu, Yanfen Wang, Hengli Lin, Hong Zeng, Dongli Wu, Zhigang Liu, Yi Dai, Xiaoning Song, Changliang Shao
Monitoring the water level and volume changes of lakes and reservoirs is essential for deepening our understanding of the temporal and spatial dynamics of water resources in the Yellow River Basin, with a view to better utilizing and managing water resources. In recent years, there have been many studies on monitoring water level and volume changes in inland waters, but they were mainly focused on
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A modified NRCS-CN method for eliminating abrupt runoff changes induced by the categorical antecedent moisture conditions J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-21 Ishan Sharma, S.K. Mishra, Ashish Pandey, S.K. Kumre
The popular Natural Resources Conservation Service Curve Number (NRCS-CN) (earlier known as Soil Conservation Service Curve Number (SCS-CN) method of rainfall-runoff modeling has often faced the criticism of exhibiting quantum jumps in runoff computations because of the sudden jumps appearing in CN-values derived from NEH-4 tables for three antecedent moisture conditions (AMC), viz., AMC-I, AMC-II
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Flow distribution and mass removal in floating treatment wetlands arranged in series and spanning the channel width J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-07-16 Taís N. Yamasaki, Christopher Walker, Johannes G. Janzen, Heidi Nepf
Floating treatment wetlands (FTWs) use plants’ roots for water quality improvement. The plants are supported by a buoyant structure deployed at the water surface. The roots form a porous zone beneath the structure and remove pollutants carried in suspension through filtering, absorption and uptake. This paper used CFD simulation to model FTWs arranged in series and spanning the channel width and to
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Simulation of the flow field and scour evolution by turbulent wall jets under a sluice gate J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-06-26 Geng Li, Binbin Wang
This numerical study of scour process tested the skills of computational fluid dynamics in modeling the unsteady flow field during the scour development stage by two-dimensional turbulent wall jets under a sluice gate. The modeling was found to well describe the experimentally observed flow patterns, that is, the main jet diverged to a returning jet and a tail jet. The model also correctly predicts
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Downscaling of the flood discharge in a probabilistic framework J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-06-24 Sanaz Moghim, Mohammad Ahmadi Gharehtoragh
Many modeled and observed data are in coarse resolution, which are required to be downscaled. This study develops a probabilistic method to downscale 3-hourly runoff to hourly resolution. Hourly data recorded at the Poldokhtar Stream gauge (Karkheh River basin, Iran) during flood events (2009–2019) are divided into two groups including calibration and validation. Statistical tests including Chi-Square
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Effects of bed geometric characteristics on hyporheic exchange J. Hydro-environ. Res. (IF 2.8) Pub Date : 2022-05-31 Guangqiu Jin, Haiyu Yuan, Guangming Zhang, Zhongtian Zhang, Chen Chen, Hongwu Tang, Ling Li
As an active ecotone between the surface stream and groundwater, hyporheic zone (HZ) plays a crucial role in hydrological and ecological processes. Previous numerical simulation and experimental studies have shown that hyporheic exchange can be affected not only by current but also by geometric characteristics of the streambed. However, the geometric characteristics that affect hyporheic exchange remain
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