Unit:
Κατεύθυνση Διαχείριση Περιβάλλοντος - Ορυκτοί ΠόροιLibrary of the School of Science
Author:
Gkiouleka Elpida-Eirini
Supervisors info:
Χατζάκη Μαρία, Επίκουρη Καθηγήτρια, Γεωλογίας και Γεωπεριβάλλοντος, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Original Title:
Assessment of Trends in Water Supply and Demand under Climate Change Conditions for Three Cr(VI) Impacted Areas (Loutraki, Assopos and Central Euboea, Greece) with the Aid of Precipitation and Drought Analysis and Indices
Translated title:
Assessment of Trends in Water Supply and Demand under Climate Change Conditions for Three Cr(VI) Impacted Areas (Loutraki, Assopos and Central Euboea, Greece) with the Aid of Precipitation and Drought Analysis and Indices
Summary:
High concentrations of Cr(VI) were recorded in three areas located in central Greece: Euboea Island, the Asopos River Basin and the Loutraki Region (Fig. 1). An investigation of the hydrological characteristics of those areas was undertaken, in order for data regarding the current situation to be amassed and evaluated. In this manner, appropriate mitigation scenarios can be proposed for consideration. The subject of this thesis concerns the assessment of hydrological characteristics regarding the area of study, related climatology, average prevailing conditions, extreme values, and variability concerning the component responsible for surface water supply in the water balance equation, determining current and future climate conditions.
Drought is analyzed with the aid of the Standardized Precipitation Index (SPI), which utilizes precipitation data and was designed to quantify the precipitation deficit, by calculating the probability of precipitation for a selected time scale. The SPI index is widely used as a tool for the estimation of the intensity and duration of drought events. Here, the SPI is calculated for three different time scales (3-month SPI, 6-month SPI and 12 – month SPI).
Two types of data were employed: Gridded Observations aiming to assess the current hydrometeorological conditions prevalent in the three areas of study from the beginning of the previous century until today and Model Data corresponding to two RCP (Representative Concentration Pathways) scenarios in order to evaluate prevalent climatic conditions for the near and the remote future. Results are visually represented, so they will be easily accessible to decision makers. Data was incorporated in the study areas’ map showcasing each area’s special characteristics.
From this analysis, it can be deduced that mean precipitation and drought values show almost no change during the previous century. Variability on the other hand, displays a statistically significant rise, especially with respect to the wet period. Regarding the future climate, RCP4.5 shows a tendency towards drier conditions, while under RCP 8.5 it is clear that both short and long term drought conditions are expected to be extremely dry, affecting agricultural activities and underwater reservoirs respectively, especially towards the end of the century.
The current study is part of an integrated project comprised of various stages, ERANETMED CrITERIA. The project will deliver an optimization tool including documentation and a database to assist water resource management organizations and water users with decision making when coping with water scarcity, climate change and polluted water.
Main subject category:
Science
Other subject categories:
Geology
Klimatology
Environment
Keywords:
Statistical analysis, drought indices, precipitation, water, climate change
Number of references:
123
