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Major Water Conservancy and Hydropower Project Hub Layout and Hydraulic Innovation Technology

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 418

Special Issue Editors


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Guest Editor
Nanjing Hydraulic Research Institute, Nanjing 210029, China
Interests: engineering hydraulics; hydraulic safety monitoring and assessment; interconnected river system network; urban water environment
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, China
2. KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Interests: hydraulic modeling; computational fluid dynamics; high-speed flow; energy dissi-pation; flow aeration; engineering damage; hydraulic safety assessment
Nanjing Hydraulic Research Institute, Nanjing 210029, China
Interests: hydrodynamics of lakes; coastal and offshore engineering; engineering hydraulics; thermal water transport and diffusion; application of image recognition in hydraulics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Interests: hydraulics; two-phase flow; hydraulic structure; computational fluid dynamics; machine learning

Special Issue Information

Dear Colleagues,

In recent years, the scale and construction difficulty of high dams and large reservoirs has gradually increased, presenting numerous challenges to the layout of engineering hubs and hydraulic safety. Most high dams are made of local materials, with harsh geological conditions, large discharge flow rates of spillway structures, and high water heads. They generally face problems such as flow energy dissipation, flow aeration, ventilation and air supply, flood discharge atomization, and site vibration. With the gradual shift in hydropower development to high-altitude areas and the increasing requirements for emergency measures of projects, higher demands have been placed on aspects such as the impact of low-pressure environments, deep rapid drainage facilities for reservoirs, emergency responses to extreme accidents, disaster reduction and loss mitigation, and benefit improvement. Therefore, this Special Issue will focus on the layout challenges and hydraulic innovation technologies of high dams and large reservoirs. We sincerely invite you to contribute to this Special Issue.

Prof. Dr. Shiqiang Wu
Dr. Fangfang Wang
Dr. Ang Gao
Dr. Shicheng Li
Guest Editors

Manuscript Submission Information

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Keywords

  • high dams
  • large reservoirs
  • engineering hydraulic safety
  • high-speed flow
  • safety assessments
  • new technologies
  • deep drainage
  • two-phase flow

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Published Papers (1 paper)

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Research

22 pages, 7004 KiB  
Article
Insights into the Hydraulic Characteristics of Critical A-Jumps for Energy Dissipator Design
by Lei Jiang, Yao Deng, Yangrong Liu, Lindong Fang and Xiafei Guan
Water 2025, 17(7), 960; https://doi.org/10.3390/w17070960 - 25 Mar 2025
Viewed by 270
Abstract
Hydraulic jumps are widely used to dissipate excess energy in civil, ocean, and hydro-power engineering, particularly in high dams with large reservoirs. Different inflow and tailwater conditions lead to the occurrence of various types of hydraulic jumps. Among them, A-jumps are often preferred [...] Read more.
Hydraulic jumps are widely used to dissipate excess energy in civil, ocean, and hydro-power engineering, particularly in high dams with large reservoirs. Different inflow and tailwater conditions lead to the occurrence of various types of hydraulic jumps. Among them, A-jumps are often preferred for stilling basin design, due to their high energy dissipation efficiency and favorable outflow patterns. This study numerically investigated the hydraulic characteristics of 75 critical A-jumps by adjusting tailwater levels, considering varying inflow conditions (flow depth, velocity, discharge, and Froude number) and stilling basin parameters (negative step height and incident angle), covering key parameter ranges from existing practical applications in high dam projects. Based on theoretical analysis and numerical simulations, estimation methods are proposed for the key hydraulic parameters of A-jumps, including the sequent depth ratio, roller length, reattachment length, and energy dissipation rate. A correction for the sequent depth ratio, incorporating the influence of the incident angle, is proposed for the first time. These estimation methods offer valuable insights for designing and optimizing negative step stilling basins in various practical engineering scenarios. To validate their applicability, a case study was conducted, showcasing the superior energy dissipation and stable outflow performance of the designed stilling basin, with the basin length shortened by 1.8% and the near-bottom velocity reduced by 42.4%, based on the proposed estimations, compared to the classical stilling basin. Full article
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