Special Issue "Urban Hydraulics: Water Supply and Wastewater Discharge Systems"

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

Deadline for manuscript submissions: 8 April 2021.

Special Issue Editor

Dr. Joaquim Sousa
Guest Editor
Instituto Politécnico de Coimbra | IPC/ISEC · Departamento de Engenharia Civil, Portugal
Interests: Water suplly, Water disribution network, Optimization, Design, Operation, Reliability

Special Issue Information

Dear Colleagues,

Water supply and wastewater systems are vital infrastructures for the well-being of communities. However, in a rapidly changing and increasingly demanding world, these infrastructures are facing new challenges like climate change effects, water scarcity problems, environmental impacts, demographic changes, migrations, or terrorism threats (physical or cyber-attacks).

On the other hand, ageing assets impose a new paradigm: the major focus is no longer the planning and design of new infrastructures, but the management of existing ones.

This context forces us to make good use of new and/or improved technologies and more than ever to bridge the gap between scientific knowledge and common practice.

Modeling and optimization (single- or multi-objective, multi-criteria analysis, decision support systems) are still evolving and will continue to be crucial tools. New low-cost sensors, control devices, and communication networks/protocols (IoT), in real time, will provide enormous quantities of data (big data) to be processed and used and to remotely control the systems. Uncertainty analysis methods will be a must; the role of artificial intelligence will continue to grow; etc.

There is much to be done, but it is the only way to achieve good service levels and assure systems’ sustainability. It is our mission to put knowledge at the service of this global cause—the world is counting on us.

Dr. Joaquim Sousa
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.


  • water supply
  • wastewater
  • modeling
  • optimization
  • IoT
  • big data
  • uncertainty
  • artificial intelligence
  • sustainability

Published Papers (1 paper)

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Open AccessArticle
Study on the Performance Improvement of Axial Flow Pump’s Saddle Zone by Using a Double Inlet Nozzle
Water 2020, 12(5), 1493; https://doi.org/10.3390/w12051493 - 23 May 2020
The operating range of axial flow pumps is often constrained by the onset of rotating stall. An improved method using a double inlet nozzle to stabilize the performance curve is presented in the current study; a single inlet nozzle and three kinds of [...] Read more.
The operating range of axial flow pumps is often constrained by the onset of rotating stall. An improved method using a double inlet nozzle to stabilize the performance curve is presented in the current study; a single inlet nozzle and three kinds of double inlet nozzle with different rib gap widths at the inlet of axial flow pump impeller were designed. Three dimensional (3D) incompressible flow fields were simulated, and the distributions of turbulence kinetic energy and velocity at different flow rates located at the inlet section, as well as the pressure and streamline in the impeller, were obtained at the same time. The single inlet nozzle scheme and a double inlet nozzle scheme were studied; the experimental and numerical performance results show that although the cross section is partly blocked in the double inlet nozzle, the head and efficiency do not decline at stable operation flow rate. On small flow rate condition, the double inlet nozzle scheme effectively stabilized the head-flow performance, whereby the block induced by the backflow before the impeller was markedly improved by using a double inlet nozzle. It has also been found that the rib gap width impacts the efficiency curve of the axial flow pump. Full article
(This article belongs to the Special Issue Urban Hydraulics: Water Supply and Wastewater Discharge Systems)
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