Simulation and Multi-Objective Management of Coastal Aquifers in Semi-Arid Regions

Kourakos, G; Mantoglou, A

dc.contributor.author	Kourakos, G	en
dc.contributor.author	Mantoglou, A	en
dc.date.accessioned	2014-03-01T01:37:04Z
dc.date.available	2014-03-01T01:37:04Z
dc.date.issued	2011	en
dc.identifier.issn	0920-4741	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21438
dc.subject	Aquifer management	en
dc.subject	Coastal aquifers	en
dc.subject	Genetic algorithms	en
dc.subject	Pumping optimization	en
dc.subject	Seawater intrusion	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Water Resources	en
dc.subject.other	Aquifer management	en
dc.subject.other	Coastal aquifers	en
dc.subject.other	Coastal regions	en
dc.subject.other	Computationally efficient	en
dc.subject.other	Constraint violation	en
dc.subject.other	Decision variables	en
dc.subject.other	Environmental costs	en
dc.subject.other	Finite difference model	en
dc.subject.other	Ground water recharge	en
dc.subject.other	Groundwater withdrawal	en
dc.subject.other	Management plans	en
dc.subject.other	Multi objective	en
dc.subject.other	NSGA-II	en
dc.subject.other	Objective functions	en
dc.subject.other	Optimization framework	en
dc.subject.other	Optimization problems	en
dc.subject.other	Pareto front	en
dc.subject.other	Penalty function	en
dc.subject.other	Pumping optimization	en
dc.subject.other	Seawater intrusion	en
dc.subject.other	Semi arid	en
dc.subject.other	Semi-arid region	en
dc.subject.other	Summer months	en
dc.subject.other	Trade-off curves	en
dc.subject.other	Variable density	en
dc.subject.other	Water demand	en
dc.subject.other	Water flows	en
dc.subject.other	Well location	en
dc.subject.other	Aquifers	en
dc.subject.other	Arid regions	en
dc.subject.other	Climate change	en
dc.subject.other	Coastal zones	en
dc.subject.other	Constrained optimization	en
dc.subject.other	Decision making	en
dc.subject.other	Drought	en
dc.subject.other	Genetic algorithms	en
dc.subject.other	Groundwater geochemistry	en
dc.subject.other	Hydrogeology	en
dc.subject.other	Multiobjective optimization	en
dc.subject.other	Potable water	en
dc.subject.other	Pumps	en
dc.subject.other	Recharging (underground waters)	en
dc.subject.other	Salt water intrusion	en
dc.subject.other	Seawater	en
dc.subject.other	Sewage	en
dc.subject.other	Three dimensional	en
dc.subject.other	Wastewater	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	Water injection	en
dc.subject.other	Water pollution	en
dc.subject.other	Water quality	en
dc.subject.other	Groundwater resources	en
dc.subject.other	coastal aquifer	en
dc.subject.other	computer simulation	en
dc.subject.other	genetic algorithm	en
dc.subject.other	optimization	en
dc.subject.other	recharge	en
dc.subject.other	seawater	en
dc.subject.other	water flow	en
dc.subject.other	water management	en
dc.subject.other	water quality	en
dc.subject.other	Cycladas	en
dc.subject.other	Greece	en
dc.subject.other	Santorin	en
dc.subject.other	Southern Aegean	en
dc.title	Simulation and Multi-Objective Management of Coastal Aquifers in Semi-Arid Regions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11269-010-9677-x	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11269-010-9677-x	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Groundwater is the main water resource in many semi-arid coastal regions and water demand, especially in summer months, can be very high. Groundwater withdrawal for meeting this demand often causes seawater intrusion and degradation of water quality of coastal aquifers. In order to satisfy demand, a combined management plan is proposed and is under consideration for the island of Santorini. The plan involves: (1) desalinization (if needed) of pumped water to a potable level using reverse osmosis and (2) injection into the aquifer of biologically-treated waste water. The management plan is formulated in a multi-objective, optimization framework, where simultaneous minimization of economic and environmental costs is desired, subject to a constraint so that cleaned water satisfies demand. The decision variables concern the well locations and the corresponding pumping and recharging rates. The problem is solved using a computationally efficient, multi-objective, genetic algorithm (NSGAII). The constrained multi-objective, optimization problem is transformed to an unconstrained one using a penalty function proportional to constraint violation. This extends the definition of the objective function outside the domain of feasibility. The impact of prolonged droughts on coastal aquifers is investigated by assuming various scenarios of reduced groundwater recharge. Water flow and quality in the coastal aquifer is simulated using a three-dimensional, variable density, finite difference model (SEAWAT). The method is initially applied to a test aquifer and the trade-off curves (Pareto fronts) are determinedl for each drought scenario. The trade-off curves indicate an increase on the economic and environmental cost as groundwater recharge reduces due to climate change. © 2010 Springer Science+Business Media B.V.	en
heal.publisher	SPRINGER	en
heal.journalName	Water Resources Management	en
dc.identifier.doi	10.1007/s11269-010-9677-x	en
dc.identifier.isi	ISI:000287755500002	en
dc.identifier.volume	25	en
dc.identifier.issue	4	en
dc.identifier.spage	1063	en
dc.identifier.epage	1074	en