Please login first
Christos Karavitis   Professor  University Lecturer 
Timeline See timeline
Christos Karavitis published an article in January 2019.
Top co-authors See all
D. Bolster

99 shared publications

Department of Civil & Environmental Engineering & Earth Sciences; University of Notre Dame; Notre Dame IN

Jorge Gironás

42 shared publications

Center for Sustainable Urban Development Santiago CHL

Francisco Suárez

34 shared publications

Departamento de ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Santiago, RM, Chile

Thomas Wintgens

18 shared publications

Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Hofackerstrasse 30, 4132 Muttenz, Switzerland

José F. Muñoz

12 shared publications

Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile

11
Publications
12
Reads
2
Downloads
42
Citations
Publication Record
Distribution of Articles published per year 
(2008 - 2019)
Total number of journals
published in
 
8
 
Publications See all
Article 0 Reads 0 Citations Poseidon—Decision Support Tool for Water Reuse Emmanuel Oertlé, Christoph Hugi, Thomas Wintgens, Christos A... Published: 16 January 2019
Water, doi: 10.3390/w11010153
DOI See at publisher website ABS Show/hide abstract
In an era when many water systems worldwide are experiencing water stress regarding water quantity and quality, water reuse has received growing attention as one of the most promising integrated mitigating solutions. Nevertheless, the plethora of technologies and their combinations available, as well as social, economic, and environmental constraints, often make it complex for stakeholders and especially decision makers to elicit relevant information. The scope of the current study is to develop a decision support tool that supports pre-feasibility studies and aims at promoting water reuse and building capacities in the field. The tool developed currently encompasses 37 unit processes combined into 70 benchmark treatment trains. It also contains information on water quality standards and typical wastewater qualities. It estimates the removal performances for 12 parameters and the lifecycle costs including distribution. The tool and all underlying data are open access and under continuous development. The underlying systemic approach of the tool makes it intuitive also for users with limited prior knowledge in the field to identify most adequate solutions based on a multi-criteria assessment. This should help to promote water reuse and spearhead initiates for more detailed feasibility and design commissioning for implementation of water reuse schemes.
Article 2 Reads 1 Citation Assessment of the Vulnerability to Drought and Desertification Characteristics Using the Standardized Drought Vulnerabil... Demetrios E. Tsesmelis, Christos A. Karavitis, Panagiotis Oi... Published: 30 December 2018
Resources, doi: 10.3390/resources8010006
DOI See at publisher website ABS Show/hide abstract
The degradation of natural resources at an intense rate creates serious problems in the environmental systems particularly with the compounding effects of climatic vagaries and changes. On the one hand, desertification is a crucial universal, mostly an anthropogenic environmental issue affecting soils all over the world. On the other hand, drought is a natural phenomenon in direct association with reduced rainfall in various spatial and temporal frames. Vulnerabilities to drought and desertification are complex processes caused by environmental, ecological, social, economic and anthropogenic factors. Particularly for the Mediterranean semi-arid conditions, where the physical and structural systems are more vulnerable, the abuse and overuse of the natural resources lead to their degradation and ultimately, if the current trends continue, to their marginalization. The scope of the current effort is trying to find any common drivers for the pressures of both processes. Thus, the vulnerabilities to drought and desertification are comparing by using the Standardized Drought Vulnerability Index (SDVI) and the Environmentally Sensitive Areas Index (ESAI). The indices are calculated from October 1983 to September 1996 in Greece. Greece is prone to desertification and it is often experiencing intense droughts, thus it presents an almost ideal case study area. The results may indicate that the most important factor for such procedures is the deficits in water resources, either due to lower than usually expected rainfall or to higher societal water demand.
CONFERENCE-ARTICLE 19 Reads 1 Citation Multi-Index Drought Assessment in Europe Panagiotis Oikonomou, Christos Karavitis, Elpida Kolokytha Published: 15 November 2018
Proceedings, doi: 10.3390/ECWS-3-05822
DOI See at publisher website ABS Show/hide abstract

Any attempt for the application of integrated drought management, requires identifying and characterizing the event per se. The questions of scale, boundary, and of geographic areal extend are of central concern for any efforts of drought assessment, impacts identification, and thus of drought mitigation implementation mechanisms. The use of drought indices, such as Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI), has often lead to pragmatic realization of drought duration, magnitude and spatial extend. The current effort presents the implementation of SPI and SPEI on a Pan-European scale and it is evaluated using existing precipitation and temperature data. The E-OBS gridded dataset for precipitation, minimum temperature, and maximum temperature were used, covering the period 1969 – 2018. The two indices were estimated for time steps of 6, and 12 months. The results for the application period of recurrent droughts indicate the potential that both indices offer for an improvement on drought management, comparability, identification of critical areas, threshold definitions, towards better planning and mobilization of resources for mitigation efforts.

Article 1 Read 1 Citation A novel framework for filling data gaps in groundwater level observations Panagiotis Oikonomou, Ayman H. Alzraiee, Christos A. Karavit... Published: 01 September 2018
Advances in Water Resources, doi: 10.1016/j.advwatres.2018.06.008
DOI See at publisher website
Article 0 Reads 1 Citation A Dynamic, Multivariate Sustainability Measure for Robust Analysis of Water Management under Climate and Demand Uncertai... Christian Hunter, Jorge Gironás, Diogo Bolster, Christos A. ... Published: 30 October 2015
Water, doi: 10.3390/w7115928
DOI See at publisher website ABS Show/hide abstract
Considering water resource scarcity and uncertainty in climate and demand futures, decision-makers require techniques for sustainability analysis in resource management. Through unclear definitions of “sustainability”, however, traditional indices for resource evaluation propose options of limited flexibility by adopting static climate and demand scenarios, limiting analysis variables to a particular water-use group and time. This work proposes a robust, multivariate, dynamic sustainability evaluation technique and corresponding performance indicator called Measure of Sustainability (MoS) for resource management that is more adapted to withstand future parameter variation. The range of potential future climate and demand scenarios is simulated through a calibrated hydrological model of Copiapó, Chile, a case study example of an arid watershed under extreme natural and anthropogenic water stresses. Comparing MoS and cost rankings of proposed water management schemes, this paper determines that the traditional evaluation method not only underestimates future water deficits, but also espouses solutions without considering uncertainties in supply and demand. Given the uncertainty of the future and the dependence of resources upon climate and market trajectories, the MoS methodology proposes solutions that, while perhaps are not the most optimal, are robust to variations in future parameter values and are thus the best water management options in a stochastic natural world.
Article 0 Reads 8 Citations Integrated Water Resource Management and Energy Requirements for Water Supply in the Copiapó River Basin, Chile Francisco Suarez, José F. Muñoz, Bonifacio Fernández, Jean-M... Published: 27 August 2014
Water, doi: 10.3390/w6092590
DOI See at publisher website ABS Show/hide abstract
Population and industry growth in dry climates are fully tied to significant increase in water and energy demands. Because water affects many economic, social and environmental aspects, an interdisciplinary approach is needed to solve current and future water scarcity problems, and to minimize energy requirements in water production. Such a task requires integrated water modeling tools able to couple surface water and groundwater, which allow for managing complex basins where multiple stakeholders and water users face an intense competition for limited freshwater resources. This work develops an integrated water resource management model to investigate the water-energy nexus in reducing water stress in the Copiapó River basin, an arid, highly vulnerable basin in northern Chile. The model was utilized to characterize groundwater and surface water resources, and water demand and uses. Different management scenarios were evaluated to estimate future resource availability, and compared in terms of energy requirements and costs for desalinating seawater to eliminate the corresponding water deficit. Results show a basin facing a very complex future unless measures are adopted. When a 30% uniform reduction of water consumption is achieved, 70 GWh over the next 30 years are required to provide the energy needed to increase the available water through seawater desalination. In arid basins, this energy could be supplied by solar energy, thus addressing water shortage problems through integrated water resource management combined with new technologies of water production driven by renewable energy sources.
Top