scholarly journals An Overview of Hybrid Water Supply Systems in the Context of Urban Water Management: Challenges and Opportunities

Water ◽  
2014 ◽  
Vol 7 (12) ◽  
pp. 153-174 ◽  
Author(s):  
Mukta Sapkota ◽  
Meenakshi Arora ◽  
Hector Malano ◽  
Magnus Moglia ◽  
Ashok Sharma ◽  
...  
Keyword(s):  
Water Management ◽  
Water Supply ◽  
Water Supply Systems ◽  
Urban Water ◽  
Urban Water Management ◽  
Challenges And Opportunities ◽  
Supply Systems

scholarly journals Evaluation of Current Issues in Water Supply Systems and Implications for Sustainable Urban Water Management in Limbe, South West Region of Cameroon

2020 ◽  
pp. 52-74
Author(s):  
Baba Adamu ◽  
Ndi Humphrey N. ◽  
Balgah Sounders N.
Keyword(s):  
Water Management ◽  
Water Supply ◽  
Urban Growth ◽  
Primary Data ◽  
Water Supply Systems ◽  
Urban Water ◽  
Urban Water Management ◽  
Long Distance ◽  
Sustainable Urban Water Management ◽  
Supply Systems

Water supply system has played a significant role in the growth, development and wellbeing of cities. Until now, meeting the need of city residents in terms of availability, reliability, and access to a good quality water supply is a major challenge facing many denizens of the 21st Century due to unprecedented urban growth and urbanization rates. This study is out to examine the current issues and challenges to water supply systems in Limbe. The study adopted the mix method approach which involves triangulation of quantitative and qualitative methods of data collection. Primary data were obtained from field observations, interviews and the administration of 383 questionnaires to households and stakeholders. Secondary data were obtained from relevant official documents, published and unpublished sources relevant to water supply systems. Satellite imageries and ArcGIS were used to describe the pattern of growth in built-up areas between 1986 and 2019. Data from the questionnaire were entered using Epi Data Version 3.1, analysed using the Statistical Package for Social Science Standard version 21.0 and Microsoft Excel and presented in the form of tables, figures, plates and maps. Findings revealed that, although the water supply accessibility by utilities has improved significantly, the reliability, distribution, flow frequency, supply, price and quality are still low. The inaccessibility and unreliability in the water supply have turned most households to alternative sources with poor quality. Unsustain urbanization and urban growth are occurring through infills in city remaining open spaces and ‘out spill’ and expansion at the outskirt without a concurrent increase, upgrading or extension of water supply infrastructural systems resulting to congestion, conflict over allocation, long-distance trekking to source water, deterioration of basic social services, pollution, inaccessibility amongst to ensure efficient water supply systems and sustainable urban water management. The paper, therefore, calls for the rehabilitation and renovation of dilapidated water supply structures, extension and upgrading basic services, limit urbanization and urban growth, encourage the construction and use of alternative water sources, community participation amongst others for sustainable urban water supply management.

scholarly journals A Clustered, Decentralized Approach to Urban Water Management

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 185 ◽  
Author(s):  
Seneshaw Tsegaye ◽  
Thomas M. Missimer ◽  
Jong-Yeop Kim ◽  
Jason Hock
Keyword(s):  
Water Management ◽  
Water Source ◽  
Decision Makers ◽  
Water Supply Systems ◽  
Urban Water ◽  
Urban Water Management ◽  
Reduced Pressure ◽  
Supply Systems ◽  
Optimal Cluster ◽  
Centralized System

Current models in design of urban water management systems and their corresponding infrastructure using centralized designs have commonly failed from the perspective of cost effectiveness and inability to adapt to the future changes. These challenges are driving cities towards using decentralized systems. While there is great consensus on the benefits of decentralization; currently no methods exist which guide decision-makers to define the optimal boundaries of decentralized water systems. A new clustering methodology and tool to decentralize water supply systems (WSS) into small and adaptable units is presented. The tool includes two major components: (i) minimization of the distance from source to consumer by assigning demand to the closest water source, and (ii) maximization of the intra-cluster homogeneity by defining the cluster boundaries such that the variation in population density, land use, socio-economic level, and topography within the cluster is minimized. The methodology and tool were applied to Arua Town in Uganda. Four random cluster scenarios and a centralized system were created and compared with the optimal clustered WSS. It was observed that the operational cost of the four cluster scenarios is up to 13.9 % higher than the optimal, and the centralized system is 26.6% higher than the optimal clustered WSS, consequently verifying the efficacy of the proposed method to determine an optimal cluster boundary for WSS. In addition, optimal homogeneous clusters improve efficiency by encouraging reuse of wastewater and stormwater within a cluster and by minimizing leakage through reduced pressure variations.

scholarly journals A Clustered, Decentralized Approach to Urban Water Management

2019 ◽  
Author(s):  
Seneshaw Tsegaye ◽  
Thomas M. Missimer ◽  
Jong-Yeop Kim ◽  
Jason Hock
Keyword(s):  
Water Management ◽  
Water Source ◽  
Decision Makers ◽  
Water Supply Systems ◽  
Urban Water ◽  
Urban Water Management ◽  
Reduced Pressure ◽  
Supply Systems ◽  
Optimal Cluster ◽  
Centralized System

Abstract: Current models in design of urban water management systems and their corresponding infrastructure using centralized designs have commonly failed from the perspective of cost effectiveness and inability to adapt to the future changes. These challenges are driving cities towards using decentralized systems. While there is great consensus on the benefits of decentralization; currently no methods exist which guide decision-makers to define the optimal boundaries of decentralized water systems. A new clustering methodology and tool to decentralize water supply systems (WSS) into small and adaptable units is presented. The tool includes two major components: (i) minimization of the distance from source to consumer by assigning demand to the closest water source, and (ii) maximization of the intra-cluster homogeneity by defining the cluster boundaries such that the variation in population density, land use, socio-economic level, and topography within the cluster is minimized. The methodology and tool are applied to Arua Town in Uganda. Four random cluster scenarios and a centralized system were created and compared with the optimal clustered WSS. It was observed that the operational cost of the four cluster scenarios is up to 13.9 % higher than the optimal, and the centralized system is 26.6% higher than the optimal clustered WSS, consequently verifying the efficacy of the proposed method to determine an optimal cluster boundary for WSS. In addition, optimal homogeneous clusters improve efficiency by encouraging reuse of wastewater and stormwater within a cluster and by minimizing leakage through reduced pressure variations.

scholarly journals Energy implications of the millennium drought on urban water cycles in Southeast Australian cities

2017 ◽  
Vol 18 (1) ◽  
pp. 214-221
Author(s):  
K. L. Lam ◽  
P. A. Lant ◽  
S. J. Kenway
Keyword(s):  
Water Supply ◽  
Water Conservation ◽  
Energy Use ◽  
Water Supply Systems ◽  
Urban Water ◽  
Demand Side ◽  
Related Energy ◽  
Millennium Drought ◽  
Wide Range ◽  
Supply Systems

Abstract During the Millennium Drought in Australia, a wide range of supply-side and demand-side water management strategies were adopted in major southeast Australian cities. This study undertakes a time-series quantification (2001–2014) and comparative analysis of the energy use of the urban water supply systems and sewage systems in Melbourne and Sydney before, during and after the drought, and evaluates the energy implications of the drought and the implemented strategies. In addition, the energy implications of residential water use in Melbourne are estimated. The research highlights that large-scale adoption of water conservation strategies can have different impacts on energy use in different parts of the urban water cycle. In Melbourne, the per capita water-related energy use reduction in households related to showering and clothes-washing alone (46% reduction, 580 kWhth/p/yr) was far more substantial than that in the water supply system (32% reduction, 18 kWhth/p/yr). This historical case also demonstrates the importance of balancing supply- and demand-side strategies in managing long-term water security and related energy use. The significant energy saving in water supply systems and households from water conservation can offset the additional energy use from operating energy-intensive supply options such as inter-basin water transfers and seawater desalination during dry years.

A brief history of water supply and wastewater management in ancient Greece

2010 ◽  
Vol 10 (4) ◽  
pp. 618-628 ◽  
Author(s):  
A. N. Angelakis ◽  
D. S. Spyridakis
Keyword(s):  
Water Management ◽  
Water Supply ◽  
Ancient Greece ◽  
Storm Water ◽  
Wastewater Management ◽  
Urban Water ◽  
Urban Water Management ◽  
History Of ◽  
Water And Wastewater ◽  
Greek Civilization

The evolution of urban water management in ancient Greece begins in Crete during the Middle Bronze and the beginning of the Late Bronze Ages (ca. 2000–1500 B.C.) when many remarkable developments occurred in several stages as Minoan civilization flourished on the island. One of its salient characteristics was the architectural and hydraulic function of its water supply and sewerage systems in the Minoan Palaces and several other settlements. These technologies, though they do not give a complete picture of water supply and wastewater and storm water technologies in ancient Greece, indicate nevertheless that such technologies have been used in Greece since prehistoric times. Minoan water and wastewater technologies were diffused to the Greek mainland in the subsequent phases of Greek civilization, i.e. in the Mycenaean, Archaic, Classical, Hellenistic and Roman periods. The scope of this article is the presentation of the most characteristic forms of ancient hydraulic works and related technologies and their uses in past Greek civilizations.

scholarly journals Balancing security, resilience, and sustainability of urban water supply systems in a desirable operating space

2020 ◽  
Vol 15 (3) ◽  
pp. 035007 ◽  
Author(s):  
Elisabeth H Krueger ◽  
Dietrich Borchardt ◽  
James W Jawitz ◽  
P Suresh C Rao
Keyword(s):  
Water Supply ◽  
Water Supply Systems ◽  
Urban Water ◽  
Urban Water Supply ◽  
Operating Space ◽  
Supply Systems
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