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Published in: Water Resources Management 10/2021

02-07-2021

Optimal Model of Desalination Planning Under Uncertainties in a Water Supply System

Authors: Zongzhi Wang, Ailing Ye, Kelin Liu, Liting Tan

Published in: Water Resources Management | Issue 10/2021

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Abstract

A requirement for developing desalination efforts in coastal regions suffering water scarcity is proposed to address the increased water demand and limited traditional water supply. The determination of a plant capacity and water allocation scheme in a multiple-source water supply system, as the first problem in planning desalination under streamflow and water demand uncertainties, remains a challenge. To address this gap, an interval-parameter two-stage stochastic programming model is developed in this study. The first-stage problem is to determine a proper desalination plant capacity, and the second is the development of a water allocation scheme under the uncertainties of natural streamflows, water demands, benefits and economic losses. The objective function is to maximize the net benefit of the system, and the cost function of desalination, including capital and operational costs, implying environmental impact, is linearized within a range of plant capacities to solve the model. The proposed approach is applied to an urban area of Weihai in China to illustrate the validity of the model. The results suggest a capacity of 46 × 103 m3/d in 2030 and 55 × 103 m3/d in 2040. Sensitivity analyses of the parameters indicate that a decrease in the unit price of electricity leads to an increase in the utilization level of desalinated seawater. A complementary relationship was observed between reclaimed water and desalinated seawater, in that a decrease in the use rate of reclaimed water from 0.38 to 0.18 led to a 15% increase in desalinated plant capacity.

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Literature
go back to reference Danzig GB (1955) Linear Programming under Uncertainty Manag Sci 1:197–206 Danzig GB (1955) Linear Programming under Uncertainty Manag Sci 1:197–206
go back to reference Mekonnen MM, Hoekstra AY (2016) Four billion people facing severe water scarcity. Sustainability 2:1–7 Mekonnen MM, Hoekstra AY (2016) Four billion people facing severe water scarcity. Sustainability 2:1–7
go back to reference Zhang L, He M, Liu K, et al (2020) Total cost analysis of desalination in costal cities——Taking Huaneng Weihai Power Plant as an example. J Econ water Resour in press: Zhang L, He M, Liu K, et al (2020) Total cost analysis of desalination in costal cities——Taking Huaneng Weihai Power Plant as an example. J Econ water Resour in press:
Metadata
Title
Optimal Model of Desalination Planning Under Uncertainties in a Water Supply System
Authors
Zongzhi Wang
Ailing Ye
Kelin Liu
Liting Tan
Publication date
02-07-2021
Publisher
Springer Netherlands
Published in
Water Resources Management / Issue 10/2021
Print ISSN: 0920-4741
Electronic ISSN: 1573-1650
DOI
https://doi.org/10.1007/s11269-021-02892-6

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