Article
Computer Science, Interdisciplinary Applications
J. Verkaik, J. D. Hughes, P. E. van Walsum, G. H. P. Oude Essink, H. X. Lin, M. F. P. Bierkens
Summary: Billions of people worldwide rely on fresh groundwater reserves for water use, and the Netherlands Hydrological Instrument provides modeling software and data for water authorities. However, the NHI integrated groundwater models often have long run times and large memory usage, so a distributed memory parallelization solution has been presented to significantly speed up the process.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Environmental Sciences
Weitian Chen, Huan Wu, John S. Kimball, Lorenzo Alfieri, Nergui Nanding, Xiaomeng Li, Lulu Jiang, Wei Wu, Yingchun Tao, Shihu Zhao, Wenting Zhong
Summary: This paper proposes an integrated model for urban flood modeling that accurately predicts the occurrence and impacts of urban flooding. By incorporating the Storm Water Management Model (SWMM) and the Dominant river tracing-Routing Integrated with VIC Environment (DRIVE) model, the integrated model successfully simulates urban rainfall-runoff and pipe drainage processes, while considering natural river basin runoff generation and routing processes. The validity of the integrated model is confirmed through three case studies in Haikou City, China.
WATER RESOURCES RESEARCH
(2022)
Article
Computer Science, Theory & Methods
Niranda Perera, Arup Kumar Sarker, Mills Staylor, Gregor von Laszewski, Kaiying Shan, Supun Kamburugamuve, Chathura Widanage, Vibhatha Abeykoon, Thejaka Amila Kanewela, Geoffrey Fox
Summary: The Data Science domain has witnessed significant expansion in the past decade, driven largely by the Big Data revolution. The use of Artificial Intelligence (AI) and Machine Learning (ML) in data engineering applications has led to the integration of data processing pipelines for terabytes of data. However, the commonly used serial Dataframes (e.g., R, pandas) face performance limitations when working with moderately large datasets. This paper introduces a cost model for evaluating parallel processing patterns and evaluates the performance of Cylon on the ORNL Summit supercomputer.
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE
(2023)
Article
Computer Science, Interdisciplinary Applications
Zhenwu Xu, Guoping Tang, Tao Jiang, Xiaohua Chen, Tao Chen, Xiangyu Niu
Summary: This study introduces an automatic partition-based parallel algorithm (APPA) to optimize the parallelization of hillslope and channel flow routing processes in distributed hydrological models. The APPA approach effectively improved parallel performance, reaching speedup ratios close to the theoretical maximum in simulated watersheds, showcasing its potential for future model-based research.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Computer Science, Theory & Methods
Inaki Amatria-Barral, Jorge Gonzalez-Dominguez, Juan Tourino
Summary: This paper presents pRIblast, a highly efficient parallel application for comprehensive lncRNA-RNA interaction prediction. Compared to other tools, pRIblast has advantages in terms of computational speed and accuracy, and can handle large-scale datasets.
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE
(2023)
Review
Computer Science, Theory & Methods
Andre Luis Barroso Almeida, Joubert de Castro Lima, Marco Antonio M. Carvalho
Summary: In the past 35 years, parallel computing has gained increasing interest in the academic community, particularly in addressing complex optimization problems. This survey focuses on the use of high-performance computing techniques to design and implement trajectory-based metaheuristics. It provides a comprehensive overview of the current state-of-the-art in multi-core and distributed trajectory-based metaheuristics, introducing basic concepts of high-performance computing and reviewing different taxonomies for architectures and metaheuristics. The survey also presents a summary and classification of 127 publications, identifies research gaps, and discusses past and future trends.
ACM COMPUTING SURVEYS
(2023)
Article
Mathematics, Interdisciplinary Applications
Qi Liu, Xiaolong Zhao, Hongyan Wang, Yongfeng Sun
Summary: The Biliu River in Dalian originates from the southern foot of Qinling Mountain in Gaizhou city, with an elevation of 1047 m. The river's hydrological elements mainly include rainfall, runoff, temperature, and evaporation, among others. This paper establishes a reservoir scheduling model that considers multiple uncertainty factors and analyzes the influence of mixed uncertainty on reservoir scheduling and Xingli's objectives based on probability box theory.
Article
Computer Science, Interdisciplinary Applications
G. Houzeaux, R. M. Badia, R. Borrell, D. Dosimont, J. Ejarque, M. Garcia-Gasulla, V Lopez
Summary: This work presents an elastic computing methodology that adjusts the allocated resources to a simulation automatically based on the runtime measure of communication efficiency, resulting in efficient simulations.
COMPUTERS & FLUIDS
(2022)
Article
Chemistry, Multidisciplinary
Aleardo Manacero, Emanuel Guariglia, Thiago Alexandre de Souza, Renata Spolon Lobato, Roberta Spolon
Summary: Clustering is a classification method that groups objects based on similarity and extracts valuable information from large datasets. This paper proposes a parallel implementation on graphics processing unit for high-performance clustering at low cost, addressing the time-consuming issue caused by increasing data volumes.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Yongjia Zhang, Jianxin Zhou, Yajun Yin, Xu Shen, Xiaoyuan Ji
Summary: A parallel 3D cellular automaton model was developed for dendritic growth simulation during solidification of binary alloy, implemented using GPU with CUDA and MPI combination to achieve high parallel performance and reduce communication cost. The model accurately predicts the development of columnar and equiaxed dendrites during directional solidification at different cooling rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Computer Science, Hardware & Architecture
Victor M. Garcia-Molla, Pedro Alonso-Jorda, Ricardo Garcia-Laguia
Summary: This paper proposes a parallel version of the Suzuki algorithm designed for GPUs, which splits the image into small rectangles and tracks the borders with a dedicated thread for each rectangle. The experimental results show that the proposed parallel algorithm is more than 10 times faster than the sequential CPU routine, using the available GPUs and CPUs.
JOURNAL OF SUPERCOMPUTING
(2022)
Review
Environmental Sciences
Gonzalo Yanez-Morroni, Francisco Suarez, Jose F. Munoz, Magdalena Sofia Lagos
Summary: This study aims to investigate the hydrological characteristics of the Silala river basin and the effects of historical channelization of the Bolivian wetlands on its flow. A hydrological model was developed to estimate the discharges of surface-water and groundwater and determine different groundwater recharge scenarios. The results showed significant inter-annual and seasonal variability, with the largest recharge occurring during the Austral summer. This study provides valuable information for water resource management and conservation in the Silala river basin.
WILEY INTERDISCIPLINARY REVIEWS-WATER
(2023)
Article
Computer Science, Information Systems
Basilio B. Fraguela, Diego Andrade, Jorge Gonzalez-Dominguez
Summary: Biclustering is a data mining technique for finding highly correlated groups of rows and columns in a 2D dataset. ScalaParBiBit is a parallel tool specifically designed for finding biclusters in binary data, with improved speed and scalability compared to existing tools.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2021)
Article
Computer Science, Hardware & Architecture
Victor M. M. Garcia-Molla, Pedro Alonso-Jorda
Summary: Border tracking in binary images is crucial in computer vision applications. This paper presents a parallel algorithm that can run on multicore computers for border tracking, and compares it with the GPU algorithm. The results indicate that the GPU algorithm performs poorly for large images or images with multiple borders, while the multicore algorithm efficiently handles large images.
JOURNAL OF SUPERCOMPUTING
(2023)
Article
Water Resources
Anjana Ekka, Saket Keshav, Saket Pande, Pieter van der Zaag, Yong Jiang
Summary: This study examines the hydrological alterations resulting from reservoir construction and water abstraction in the upper Cauvery river basin in India. Using a landscape-based hydrological model, the study analyzes the impacts of dams on river flow regimes. The results show that reservoir impoundment and water abstractions have modified the natural flow regimes, particularly in terms of median monthly flow, 1-day minimum flow, and low pulses. These findings provide valuable insights for water managers to sustain natural flow regimes and contribute to the sustainable management of river basins in India.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Multidisciplinary Sciences
Hongbo Ma, Jeffrey A. Nittrouer, Baosheng Wu, Michael P. Lamb, Yuanfeng Zhang, David Mohrig, Xudong Fu, Kensuke Naito, Yuanjian Wang, Andrew J. Moodie, Guangqian Wang, Chunhong Hu, Gary Parker
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Environmental Sciences
Chenge An, Zheng Gong, Kensuke Naito, Gary Parker, Marwan A. Hassan, Hongbo Ma, Xudong Fu
Summary: Many sand-bed rivers worldwide are experiencing reductions in sediment load, leading to river delta drowning. This study proposes a grain size-specific relation to simulate river morphodynamic evolution, finding that sediment grain sorting accelerates bed surface armoring and reduces sediment load delivery to the delta. These results have practical implications for river delta restoration.
WATER RESOURCES RESEARCH
(2021)
Article
Mechanics
Zi Wu, Arvind Singh, Efi Foufoula-Georgiou, Michele Guala, Xudong Fu, Guangqian Wang
Summary: This paper introduces a new formulation to describe bedload particle hops and successfully explains the relationship between short hops and long hops. By studying the scaling exponents of travel times in different regimes, the research provides insights into the sediment transport processes in rivers.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Environmental Sciences
Jiamei Wang, Marwan A. Hassan, Matteo Saletti, Xingyu Chen, Xudong Fu, Hongwei Zhou, Xingguo Yang
Summary: The flume experiments revealed significant impacts on the steep channel, including bed surface fining, aggradation, and continuous formation and collapse of steps, caused by sediment feed pulses of different magnitudes and frequencies. The threshold for motion decreased following sediment pulses, leading to changes in bed stability, indicating that sediment feed magnitude affects morphological changes, while sediment feed frequency controls channel stability.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Jie Zhao, Tiejian Li, Kaifang Shi, Zhen Qiao, Zhongye Xia
Summary: The study found that both ERA-5 and AIRS data underestimate PWV in the northern Qinghai-Tibet Plateau, with ERA-5 data showing better consistency with radiosonde data but less accuracy in reflecting the changing trend of PWV under climate change.
Article
Geosciences, Multidisciplinary
Xin Zeng, Astrid Blom, Matthew J. Czapiga, Chenge An, Gary Parker, Xudong Fu
Summary: In this study, a meta-analysis of measured data was conducted to analyze the relationship between gully erosion and cyclic steps in upland ephemeral gullies. A new theory of plunge pool erosion was proposed and validated for its consistency with measured data.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Mechanics
Weiquan Jiang, Li Zeng, Xudong Fu, Zi Wu
Summary: This article investigates the influence of reversible adsorption-desorption on solute dispersion and proposes a simpler analytical method to derive solutions using the Laplace transform. The classic framework of separation of variables is extended to explore higher-order statistics in practice, and Gill's generalized dispersion model for solute concentration distributions is also extended to address transient dispersion characteristics. The study analyzes the influence of reversible adsorption-desorption on solute cloud and discusses the characteristics of different concentration distributions.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Geosciences, Multidisciplinary
Yongpeng Lin, Chenge An, Gary Parker, Weiming Liu, Xudong Fu
Summary: This study examines the morphodynamics of bedrock-alluvial rivers and the impact of landslide dam outburst floods. The simulation results reveal that during flood events, bedrock is eroded. In the following decades or centuries, landslide deposits can cover the river channel, hindering bedrock downcutting and resulting in a net rise of the bedrock surface. Eventually, a bedrock bump moves upstream and beyond the river reach over tens of thousands of years. When repeated dam breach events occur at a single site, a dynamic balance is achieved, with steeply increased bedrock slope near the dam site and gently decreased slope downstream. The study demonstrates the significant influence of landslide dam outburst floods on the behavior of bedrock channels.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2022)
Article
Mechanics
Zi Wu, Weiquan Jiang, Li Zeng, Xudong Fu
Summary: This article investigates the statistical properties of bedload particle motions and provides analytical solutions for hop statistics. The deposition rate is found to be related to the mean travel times and hop distances of particles, allowing for a direct determination of the deposition rate based on measured particle motion statistics.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Zheng Gong, Zi Wu, Chenge An, Bangwen Zhang, Xudong Fu
Summary: We present CP3d, a comprehensive Euler-Lagrange solver for the direct numerical simulation of particle-laden flows, which can handle different coupling regimes and utilizes various numerical approaches for fluid, particle, and coupling sub-solver. The solver is validated against several benchmarks, and shows excellent computational accuracy and efficiency.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Environmental Sciences
Guangmiao Li, Zheng Gong, Weiquan Jiang, Jie Zhan, Bohan Wang, Xudong Fu, Mengzhen Xu, Zi Wu
Summary: The transport of active particles in shear flows, such as microorganisms, plays a significant role in biological and environmental applications. The motility and gyrotaxis of algae have been shown to greatly influence their transport in waters. However, little attention has been paid to the initial and transient transport regime. In this study, we extend Gill's generalized dispersion model to active particles and thoroughly investigate the effects of swimming, gyrotaxis, and flow shear on microorganism dispersion in an open-channel flow. We find that the presence of flow enhances the transient drift velocity and dispersivity of microorganisms, while the absence of flow weakens the longitudinal dispersion due to gravitactic accumulation and stronger swimming ability.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Yongpeng Lin, Chenge An, Shan Zheng, Ruihua Nie, Gary Parker, Marwan A. Hassan, Matthew J. Czapiga, Xudong Fu
Summary: Since the 2008 Wenchuan Earthquake, the Shi-ting River in China has experienced significant bed degradation. This degradation is a result of multiple factors, including the presence of in-channel weirs, earthquake-induced mobilization of sediment, and intensive sediment mining. The study shows that weirs can reduce bedload transport and cause bed degradation, especially when coupled with additional sand supply. The simulation and observation both indicate that sediment mining is likely the key factor contributing to the dramatic bed degradation in the Shi-ting River.
WATER RESOURCES RESEARCH
(2023)
Article
Multidisciplinary Sciences
Chenge An, Hongwei Fang, Li Zhang, Xinyue Su, Xudong Fu, He Qing Huang, Gary Parker, Marwan A. Hassan, Nooreen A. Meghani, Alison M. Anders, Guangqian Wang
Summary: This passage explains why two large lakes, Dongting Lake and Poyang Lake, exist along the Yangtze River. It suggests that rising sea levels due to deglaciation caused a wave of water surface elevation and bed aggradation. The blockage of tributaries by the main stem's aggradation resulted in the formation of the lakes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geography, Physical
Xingyu Chen, Marwan A. Hassan, Xudong Fu
Summary: Image-based grain sizing has been used as an efficient method to measure grain size compared to traditional methods. However, current automatic detection methods based on image intensity have limitations in suboptimal environments. In this study, a convolutional neural network model called GrainID was proposed to measure grain size in diverse fluvial environments. Tests showed that GrainID had high predictive accuracy and outperformed other methods, even in uncalibrated rivers with drone images. GrainID also showed less variation in results and was less affected by vegetation and noise.
EARTH SURFACE DYNAMICS
(2022)
Article
Geography, Physical
Chenge An, Marwan A. Hassan, Carles Ferrer-Boix, Xudong Fu
Summary: Results from experiments show that conditioning flow can reduce sediment transport rate during subsequent floods, but this effect is limited to a relatively short time at the beginning of the flood event. The stress history effect induced by bed reorganization during conditioning phase is likely to be erased with increasing flow and sediment transport intensity during the subsequent flood event.
EARTH SURFACE DYNAMICS
(2021)
