Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: application to the Akrotiri basin and aquifer, Cyprus

Koussis, Antonis D.; Georgopoulou, E.; Kotronarou, Anastasia; Mazi, Katerina; Restrepo, Pedro J.; Destouni, Georgia; Prieto, Carmen; Rodríguez, Julio; Rodríguez‐Mirasol, J.; Cordero, Tomás; Ioannou, C.; Georgiou, Adonis; Schwartz, Jackie; Zacharias, Ierotheos

doi:10.1080/02626667.2010.512469

Cited by 26 publications

(17 citation statements)

References 9 publications

(11 reference statements)

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“…Relative to seawater desalination, the cost of the new scheme must be less than that for desalting seawater, plus the net income from irrigating with treated wastewater (Assouline & Shavit, 2004). Our Cyprus case study (Koussis et al, 2010) shows that this is indeed feasible. In that study, the injected wastewater was treated to drinking quality to guard against claims of danger to public health.…”

Section: Conceptmentioning

confidence: 94%

“…In analogy, all artificial recharge within the coastal catchment area was represented by a source flow (recharge well) per unit coastline length. The case study in Koussis et al (2010) further exemplifies and explains these simulation choices; these were made for practical reasons, dictated by the heavy computational demands of the economic optimization in screening, involving different management scenarios, and of the detailed stochastic analysis of selected scenarios.…”

Section: Groundwater Simulation Methodologymentioning

confidence: 99%

“…In the particular application detailed in Koussis et al (2010), we have simulated the random time series of N R and Q INF with the Multivariate Seasonal or Monthly Generation Model of Matalas (1967), using the historic time series as seed, assuming N R and Q INF to be correlated and preserving the mean and the lag-one correlation coefficient of the historical time series. Alternative approaches obviously exist; for example, in a different case study we developed random time series of N R and Q INF by driving the watershed model with rainfall time series synthesized with a weather generator (Koussis, 2001).…”

Section: Modelling the Groundwater Rechargementioning

confidence: 99%

“…In the application described in the sequel paper by Koussis et al (2010), these simulations were carried out with the SUTRA model (Voss, 1984), which has been also used for the stochastic analysis to study the sensitivity of results to the random temporal variability inherent in the natural recharge and boundary inflows of the aquifer and the random spatial variability associated with the hydraulic conductivity. The latter stems from the fact that is practically impossible to characterize in detail the highly variable hydraulic properties of the subsurface.…”

Section: Modelling Of the Natural Systemmentioning

confidence: 99%

“…We outline an associated DAT for screening, via quantitative modelling of the dynamic system behaviour under various management scenarios, and for investigating and identifying cost-efficient scenarios that meet the water demand and achieve long-term aquifer protection. Our sequel paper (Koussis et al, 2010) demonstrates the application of the proposed management scheme and developed DAT to a study case. Figure 1 is a sketch of a longitudinal section of a coastal aquifer, with the technological components of the proposed management system (desalination and wastewater treatment plants) and a production well and recharge facilities indicated above ground.…”

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confidence: 99%

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Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: general framework

Koussis

Georgopoulou

Kotronarou

et al. 2010

Hydrological Sciences Journal

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. (2010) Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: general framework. Hydrol. Sci. J. 55(7),1217-1233.Abstract Semi-arid coastal zones often suffer water-stress, as water demand is high and markedly seasonal, due to agriculture and tourism. Driven by scarcity of surface water, the communities in semi-arid coastal regions turn to aquifers as prime water source; but intensive exploitation of coastal aquifers causes seawater intrusion, which degrades the quality of groundwater. The cost-efficient and sustainable development of coastal aquifers can be achieved through a holistic management scheme which combines two non-traditional water sources: (a) saltwater, to be treated to the desired quality, and (b) wastewater, to be re-claimed to augment aquifer recharge for control of seawater intrusion, and also to meet certain demands. This management scheme is based on the idea that it is costadvantageous to: (i) desalt brackish groundwater, instead of seawater, as the former requires far less energy, and (ii) to re-use wastewater at only the differential cost to any treatment already practiced. In this paper, we present the general framework of the proposed management scheme, and a decision aid tool (DAT) which has been developed to assist decision makers to explore the scheme's decision space. The DAT uses cost as optimization criterion to screen various management scenarios, via modelling of the dynamic natural-engineered system behaviour, and identifies those cost-efficient ones that meet the water demand and achieve aquifer protection.Key words aquifer; brackish groundwater; coastal; cost; decision aid; desalination; optimization; recharge; sea intrusion; sustainable; water management; wastewater Gestion économe des aquifères côtiers via la recharge d'eaux usées traitées et la désalinisation d'eaux souterraines saumâtres: cadre général Résumé Les zones côtières semi-arides souffrent fréquemment de stress hydrique, dans la mesure où la demande en eau est élevée et particulièrement saisonnière, en lien avec l'agriculture et le tourisme. Poussées par la rareté des eaux de surface, les communautés des régions côtières semi-arides considèrent les aquifères comme étant les principales ressources en eau; mais une exploitation intensive des aquifères côtiers engendre des intrusions marines qui dégradent la qualité des eaux souterraines. Le développement économe et durable des aquifères côtiers peut être conduit grâce à un schéma de gestion holistique qui combine deux ressources non conventionnelles: (a) les eaux salées, à traiter pour atteindre la qualité escomptée, et (b) les eaux usées à traiter pour augmenter la recharge des aquifères et ainsi contrôler les intrusions marines et satisfaire certaines demandes. Ce schéma de gestion est basé sur l'idée qu'il est économiquement avantageux de: (i) désaler les eaux souterraines saumâtres, plutôt que les eaux marines, puisque cela nécessite bien moins d'énergie, et (ii) réutiliser les eaux usées u...

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Section: Conceptmentioning

confidence: 94%

Section: Groundwater Simulation Methodologymentioning

confidence: 99%

Section: Modelling the Groundwater Rechargementioning

confidence: 99%

Section: Modelling Of the Natural Systemmentioning

confidence: 99%

mentioning

confidence: 99%

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Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: general framework

Koussis

Georgopoulou

Kotronarou

et al. 2010

Hydrological Sciences Journal

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Analytical solutions of seawater intrusion in sloping confined and unconfined coastal aquifers

Xin

Kong

et al. 2016

Water Resources Research

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Sloping coastal aquifers in reality are ubiquitous and well documented. Steady state sharp‐interface analytical solutions for describing seawater intrusion in sloping confined and unconfined coastal aquifers are developed based on the Dupuit‐Forchheimer approximation. Specifically, analytical solutions based on the constant‐flux inland boundary condition are derived by solving the discharge equation for the interface zone with the continuity conditions of the head and flux applied at the interface between the freshwater zone and the interface zone. Analytical solutions for the constant‐head inland boundary are then obtained by developing the relationship between the inland freshwater flux and hydraulic head and combining this relationship with the solutions of the constant‐flux inland boundary. It is found that for the constant‐flux inland boundary, the shape of the saltwater interface is independent of the geometry of the bottom confining layer for both aquifer types, despite that the geometry of the bottom confining layer determines the location of the interface tip. This is attributed to that the hydraulic head at the interface is identical to that of the coastal boundary, so the shape of the bed below the interface is irrelevant to the interface position. Moreover, developed analytical solutions with an empirical factor on the density factor are in good agreement with the results of variable‐density flow numerical modeling. Analytical solutions developed in this study provide a powerful tool for assessment of seawater intrusion in sloping coastal aquifers as well as in coastal aquifers with a known freshwater flux but an arbitrary geometry of the bottom confining layer.

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Review: Simulation-optimization models for the management and monitoring of coastal aquifers

Janardhanan

Datta

2015

Hydrogeol J

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The literature on the application of simulationoptimization approaches for management and monitoring of coastal aquifers is reviewed. Both sharp-and dispersive-interface modeling approaches have been applied in conjunction with optimization algorithms in the past to develop management solutions for saltwater intrusion. Simulation-optimization models based on sharp-interface approximation are often based on the Ghyben-Herzberg relationship and provide an efficient framework for preliminary designs of saltwater-intrusion management schemes. Models based on dispersiveinterface numerical models have wider applicability but are challenged by the computational burden involved when applied in the simulation-optimization framework. The use of surrogate models to substitute the physically based model during optimization has been found to be successful in many cases. Scalability is still a challenge for the surrogate modeling approach as the computational advantage accrued is traded-off with the training time required for the surrogate models as the problem size increases. Few studies have attempted to solve stochastic coastal-aquifer management problems considering model prediction uncertainty. Approaches that have been reported in the wider groundwater management literature need to be extended and adapted to address the challenges posed by the stochastic coastal-aquifer management problem. Similarly, while abundant literature is available on simulation-optimization methods for the optimal design of groundwater monitoring networks, applications targeting coastal aquifer systems are rare. Methods to optimize compliance monitoring strategies for coastal aquifers need to be developed considering the importance of monitoring feedback information in improving the management strategies.

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Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: application to the Akrotiri basin and aquifer, Cyprus

Abstract: (2010) Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: application to the Akrotiri basin and aquifer,

Cited by 26 publications

References 9 publications

Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: general framework

Cost-efficient management of coastal aquifers via recharge with treated wastewater and desalination of brackish groundwater: general framework

Analytical solutions of seawater intrusion in sloping confined and unconfined coastal aquifers

Review: Simulation-optimization models for the management and monitoring of coastal aquifers

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