Chrysi S. Laspidou

Chrysi S. Laspidou
University of Thessaly | UTH · Τμήμα Πολιτικών Μηχανικών

Ph.D. Northwestern University

About

106
Publications
42,235
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2,501
Citations
Additional affiliations
January 2007 - present
University of Thessaly
January 1999 - December 2003
Northwestern University

Publications

Publications (106)
Article
Full-text available
Climate change impacts the water-energy-food security; given the complexities of interlinkages in the nexus system, these effects may become exacerbated when feedback loops magnify detrimental effects and create vicious cycles. Resilience is understood as the system's adaptive ability to maintain its functionality even when the system is being affe...
Article
The systematic analysis of groundwater in the Greek island of Skiathos revealed a seasonal increase of total mercury concentrations after the extensive groundwater abstraction during the busy and heavily touristic summer months. This contamination was accompanied by a corresponding increase of the chloride content of groundwater, attributed to seaw...
Article
Full-text available
Cyanobacterial blooms have been known since ancient times; however, they are currently increasing globally. Human and ecological health risks posed by harmful cyanobacterial blooms have been recorded around the world. These risks are mainly associated with their ability to affect the ecosystem chain by different mechanisms like the production of cy...
Article
Full-text available
As water scarcity becomes more prevalent, the analysis of urban water consumption patterns at the consumer level and the estimation of the corresponding water demand for water utility are expected to be among the top priorities of water companies in the near future. This study proposes a comprehensive methodology for water managers to achieve an ef...
Article
Full-text available
Understanding the complex relationships amongst Water, Energy, Food and Ecosystems (WEFE nexus) together with the achievement of Sustainable Development Goals (SDGs) is critical for the development of a sustainable and secure future in the Mediterranean area. In this study, we analysed 29 case studies across the Mediterranean region which describe...
Article
Full-text available
The Netherlands has the ambitious target of transitioning to a low-carbon economy by 2050. One factor that may constrain this progress, however, is the large spatial requirements of renewable energy technologies, and resulting competition for land through interlinkages between the Climate (C), Land (L), Energy (E), Water (W) and Food (F) domains-th...
Article
Full-text available
In Skiathos Island the water is not potable due to mercury contamination and salinization. The mercury’s origin is natural due to the existence of cinnabar in the Skiathos aquifer as a mineral in the Earth’s crust. The possibility of mercury contaminants ending up in the coastal area was investigated through a field experiment. Mussels (Mytilus gal...
Article
Full-text available
Cyanobacteria blooms in lakes and reservoirs currently threaten water security and affect the ecosystem services provided by these freshwater ecosystems, such as drinking water and recreational use. Climate change is expected to further exacerbate the situation in the future because of higher temperatures, extended droughts and nutrient enrichment,...
Technical Report
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SIM4NEXUS, acronym of the project ‘Sustainable Integrated Management FOR the NEXUS of water-land-food-energy-climate for a resource-efficient Europe’ is a Research and Innovation Action, implemented between June 2016 and June 2020. The project received funding from the European Union’s Horizon 2020 research and innovation programme. The brochure ta...
Preprint
Cyanobacteria blooms in lakes and reservoirs currently threaten water security and affect the ecosystem services provided by these freshwater ecosystems, such as drinking water and recreational use. Climate change is expected to further exacerbate the situation in the future because of higher temperatures, extended droughts and nutrient enrichment,...
Article
Full-text available
Cyanobacterial blooms are considered a major threat to global water security with documented impacts on lake ecosystems and public health. Given that cyanobacteria possess highly adaptive traits that favor them to prevail under different and often complicated stressor regimes, predicting their abundance is challenging. A dataset from 822 Northern E...
Article
Full-text available
An annual and lumped water balance assessment of a water distribution network is recommended by the International Water Association as a first step and prerequisite for improving the performance of the network by minimizing real/physical water losses, burst incidents, water theft, nonrevenue water, and energy consumption, among others. The current...
Article
Full-text available
Achieving the UN Sustainable Development Goals depends on using resources efficiently, avoiding fragmentation in decision-making, recognising the trade-offs and synergies across sectors and adopting an integrated Nexus thinking among policymakers. Nexus Informatics develops the science of recognising and quantifying nexus interlinkages. Nexus-coher...
Article
Full-text available
the sustainable management of natural resources under climate change conditions is a critical research issue. Among the many approaches emerged in recent times, the so-called ‘nexus approach’ is gaining traction in academic and policy circles. The nexus approach presupposes the analysis of bio-physical, socio-economic and policy interlinkages among...
Conference Paper
Full-text available
Climate change represents a critical research issue due to a series of impacts that both the physical and man-made environment experience during the last years. Extremes weather events, changes in biodiversity, desertification of the most vulnerable regions and relevant socioeconomic effects are among the main consequences of such a phenomenon. Gre...
Conference Paper
Full-text available
Urban water management is a key challenge nowadays and advances in information and communication technology systems show a great potential to build efficient, intelligent solutions supporting smart water management scenarios. This paper presents novel techniques for data collection, analysis and visualization developed within the Water4Cities proje...
Article
Full-text available
The concept of the Water–Energy–Food nexus (WEF), as documented by the United Nations Food and Agriculture Organization (FAO), suggests that the three resources are thoroughly interrelated, shaping a complicated web of interlinkages. Perceiving the three commodities as an interdependent variable system, rather than isolated subsystems is a step tow...
Conference Paper
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The deployment of real-world water monitoring and analytics tools is still far behind the growing needs of cities, which are facing constant urbanisation and overgrowth of the population. This paper presents a full-stack data-mining infrastructure for smart water management for cities being developed within Water4Cities project. The stack is tested...
Article
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The United Nations Food and Agriculture Organization (FAO) has established the Water-Energy-Food Nexus, implying that the three commodities are inextricably linked forming a complex system of interrelations. Perceiving water, energy and food as a system variable with dependencies rather than a singularity suggests an approach of a more holistic vie...
Article
Full-text available
In recent years, mercury (Hg) concentration that exceeds the Maximum Contaminant Level Standard set by the World Health Organisation for drinking water has been detected in the groundwater of Skiathos Island in Greece. The island single source of urban water is groundwater; as a result, tap water has been characterised as unsafe for drinking and pe...
Article
Full-text available
Water and energy are two inextricably linked resources of great importance, as they are the key for satisfying basic human needs. In this study a water–energy nexus analysis is conducted in order to achieve a sustainable supply and effectively manage water and energy at city level. Different electricity uses such as domestic, agricultural and comme...
Conference Paper
Urban water systems have great potential in water and energy saving. A thorough water losses component assessment can reveal this potential and drive utilities into a proper water management scheme towards a more sustainable use of resources. The core of such an analysis would involve ICTs-establishing a continuous and real-time or near real-time m...
Conference Paper
Full-text available
Smart cities are getting essential to drive economic growth, increase social prospects and improve high-quality lifestyle for citizens. To meet the goal of smart cities, Information and Communications Technology (ICT) have a key role. The application of smart solutions will allow the cities to use ICT and big data to improve infrastructure and serv...
Article
Full-text available
An analysis of virtual crop water export through international trade is conducted for Greece, downscaled to the River Basin District (RBD) level, in order to identify critical "hotspots" of localized water shortage in the country. A computable general equilibrium model (MAGNET) was used to obtain the export shares of crops and associated irrigation...
Article
In the smart cities context, real-time knowledge of residential water consumption has become increasingly important, especially given the fast evolution of sensors, ICT and the production of big, high-resolution data coming from the urban environment. A variety of reasons often leads to the creation of continuity gaps in these data series, thus mak...
Article
Full-text available
Water, energy, food, land and climate form a tightly-connected nexus in which actions on one sector impact other sectors, creating feedbacks and unanticipated consequences. This is especially because at present, much scientific research and many policies are constrained to single discipline/sector silos that are often not interacting (e.g., water-r...
Conference Paper
Full-text available
To enable effective decision-making at the entire city level, both surface water and groundwater should be viewed as part of the extended urban water ecosystem with its spatiotemporal availability, quantity, quality and competing uses being taken into account. The Water4Cities project aims to build an ICT solution for the monitoring, visualization...
Article
Toxic cyanobacterial blooms have been implicated for their negative consequences on many terrestrial and aquatic organisms. Water birds belong to the most common members of the freshwater food chains and are most likely to be affected by the consumption of toxic cyanobacteria as food. However, the contribution of cyanotoxins in bird mortalities is...
Article
Full-text available
The Nexus concept is the interconnection between the resources energy, water, food, land and climate. Such interconnections enable to address trade-offs and seek for synergies among them. Several policy areas (e.g. bio-based economy, circular economy) increasingly consider the Nexus concept. Ignoring synergies and trade-offs between energy and natu...
Article
Full-text available
Household water consumption is a part of the human related water cycle that can get into the core of water resources management. Analysis of water consumption data can reveal great potentials of individualized water services planning. Data mining is the process of identifying and extracting potentially useful information from data sets. Self-Organi...
Article
Full-text available
Water network partitioning (WNP) into supply clusters aims at improving management of the whole system and subsequent definition of District Meter Areas (DMAs), simplifying water budget and pressure management as well as the identification and reduction of water losses. This solution is a strategic option used by water utilities to control and oper...
Article
This study investigated the microcystins (MCs)-rich irrigation water effect on lettuce of different developmental stages, i.e. during a two months period, covering the whole period from seed germination to harvest at marketable size of the plant. We followed four lettuce plant groups receiving MCs-rich water (1.81 μg l⁻¹ of dissolved MCs), originat...
Book
The book provides a scientific approach into appraising Intermittent Water Supply (IWS) on a global scale through the analysis of available information and data based on a structured methodology for estimating the population affected by IWS worldwide both by country and by geographical regions. The root causes and the implications of IWS are dealt...
Article
In this article, we focus on shallow sub-tropical lakes and study the factors that determine their trophic state and food web structure. We use the model PCLake to simulate lake nutrient dynamics and investigate key factors causing eutrophication, such as in-lake nutrient cycling, long residence time and low depths. Modeling results are validated i...
Conference Paper
According to the 2015 European Environment-State and Outlook (SOER, 2015), the EU's total resource use has declined by 19% since 2007, less waste is being generated and recycling rates have improved in nearly every country; however, despite this progress and the relative decoupling of economic growth from environmental harm that is observed, a majo...
Article
Full-text available
The present special issue of Fresenius Environmental Bulletin contains selected manuscripts that were initially presented at the 12th International Conference on Protection & Restoration of the Environment (PRE12) that took place on the Greek island of Skiathos, from June 29 to July 3, 2014. The Conference was organized by the Department of Civil E...
Article
Full-text available
Water network partitioning (WNP) into supply clusters aims at improving management of the whole system and subsequent definition of District Meter Areas (DMAs), simplifying water budget and pressure management as well as the identification and reduction of water losses. This solution is a strategic option used by water utilities to control and oper...
Article
Full-text available
Α novel methodology for addressing policy inconsistencies and knowledge gaps that hinder the transition to a greater resource efficiency Europe is proposed. We focus on the integration of all different sectors that interact and influence each other, namely the “water- energy- food- land use- climate nexus” and we develop tools for identifying and q...
Article
Full-text available
As the water resource is becoming scarce, conservation of water has a high priority around the globe, study on water management and conservation becomes an important research problem. People are increasingly becoming more individual households, which tend to be less efficient, requiring more resources per capita than larger households. In order to...
Article
Full-text available
Toxins produced by cyanobacteria in freshwater ecosystems constitute a serious health risk worldwide for humans that may use the affected water bodies for recreation, drinking water, and/or irrigation. Cyanotoxins have also been deemed responsible for loss of animal life in many places around the world. This paper explores the effect of H2O2 treatm...
Article
Full-text available
The re-flooded lakes with unique natural and cultural values that are under threat from anthropogenic pressure, consist a very important section of fresh water resources management in the Mediterranean. Lake Karla, positioned in the eastern part of Thessaly (Greece), is an example of a lake ecosystem, which was dried in the 60s to provide additiona...
Conference Paper
In this study, we propose a new hybrid approach for time series prediction based on the efficient capabilities of fuzzy cognitive maps (FCMs) with structure optimization algorithms and artificial neural networks (ANNs). The proposed structure optimization genetic algorithm (SOGA) for automatic construction of FCM is used for modeling complexity bas...
Conference Paper
Water demand forecast has emerged as an imperative component of intelligent Internet and Communication Technologies based methodologies of water management. The need of increased time resolution of forecast in order to implement such methodologies is driving stakeholders to long for new more specialized forecast approaches that will take into accou...
Article
The interactions of three abundant cyanotoxins, namely microcystin-LR, microcystin-RR and nodularin-R with α-, β-, and γ-cyclodextrin in water were structurally and thermodynamically investigated by a computationally affordable methodology using the semi-empirical PM7 method in conjunction with an implicit treatment of solvent effects by the conduc...
Article
Full-text available
The interactions of three abundant cyanotoxins, namely microcystin-LR, microcystin-RR and nodularin-R with α-, β-, and γ-cyclodextrin in water were structurally and thermodynamically investigated by a computationally affordable methodology using the semi-empirical PM7 method in conjunction with an implicit treatment of solvent effects by the conduc...
Chapter
This paper presents an integrated framework for water resources management at urban level which consists of a Neuro-Fuzzy and Fuzzy Cognitive Map-based, (FCM) decision support system (DSS) based on multiple objectives and multiple disciplines for planning and forecasting. The proposed DSS has as primary goals to: (a) adaptively control the water pr...
Article
Full-text available
Cyanobacterial blooms are becoming a major water quality problem in Mediterranean lakes. The threat from the occurrence and persistence of cyanobacteria is considered high, and there is a risk that this might be increased by climate change. Approximately, 75% of water samples containing cyanobacteria also contain toxic cyanobacterial metabolites, k...
Article
Full-text available
Το άρθρο εστιάζει στην ανάγκη της ενσωμάτωσης της διαχείρισης του αστικού νερού στον πολεοδομικό σχεδιασμό, στο πλαίσιο της βιωσιμότητας των πόλεων του μέλλοντος. Αρχικά παρουσιάζονται οι προκλήσεις που πρέπει να αντιμετωπιστούν στην κατεύθυνση αυτής της ολιστικής θεώρησης. Στη συνέχεια γίνεται εκτενής αναφορά στις αρχές που θα πρέπει να διέπουν το...
Conference Paper
Full-text available
Pressure control management of a water distribution network is considered as an effective approach for the reduction of leakage in the network and for optimized savings in pumping energy. A successful pressure management scheme usually requires single-or multi-feed regulation through Pressure Reduction Valves, the network division in District Meter...
Article
Full-text available
Water scarcity, high water demand due to increasing urbanization and the ongoing liberalization of the water and energy markets makes water utilities look into innovative ways to approach consumers, to offer attractive plans and educate them by raising their awareness of their resource use. We analyze water consumption data from a group of consumer...
Article
Full-text available
In the present article, we simulate Lake Karla, an important natural ecosystem under restoration in Greece, operating also as a reservoir. The lake trophic state is characterized as hypertrophic with the expected negative effects on biodiversity. The simulation of Lake Karla is a significant tool in terms of understanding, predicting and managing t...
Conference Paper
Full-text available
This article is focused on the issue of learning of Fuzzy Cognitive Maps designed to model and predict time series. The multi-step supervised-learning based-on-gradient methods as well as population-based learning, with the use of real coded genetic algorithms, are described. In this study, a new structure optimization genetic algorithm for fuzzy c...