ORCID Profile
0000-0002-5564-5661
Current Organisation
CSIRO
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Publisher: MDPI AG
Date: 05-01-2018
Publisher: Springer Science and Business Media LLC
Date: 08-2008
Publisher: Springer Science and Business Media LLC
Date: 25-07-2018
Publisher: Informa UK Limited
Date: 2013
Publisher: Wiley
Date: 2012
DOI: 10.1002/EET.596
Publisher: Academy of Science of South Africa
Date: 10-07-2013
DOI: 10.4314/WSA.V39I4.12
Publisher: Informa UK Limited
Date: 06-2009
Publisher: Copernicus GmbH
Date: 28-03-2022
DOI: 10.5194/EGUSPHERE-EGU22-13391
Abstract: & & The current study attempts to identify the role of the most widely used physical, economic and institutional parameters that may affect water tariffs and affordability across several cities in high and upper-middle income countries. Differential inferential statistical methods were employed to explore potential associations of the water consumption, variable and fixed costs, utility management, and minimum wage, with the economic affordability on household level. The findings indicate a loose association of the tariffs with the above indicators which may not lead to certain assumptions. Although the results may be uncertain and inconclusive, however, there have only few studies till now exploring and comparing water affordability of urban water systems in high and upper-middle income countries. The findings could trigger further research on the better comprehension of affordability and water tariffs by improving social inclusion of low-income households on urban water accessibility and usage.& &
Publisher: Springer Science and Business Media LLC
Date: 17-02-2015
Publisher: Copernicus GmbH
Date: 26-05-2022
DOI: 10.5194/EGUSPHERE-EGU22-12115
Abstract: & & Kazakhstan is a country in transition experiencing a rapid urbanization process with the highest rate in Almaty, the former capital of the country and the largest metropolis in the whole region. Over the past ten years, the city area has doubled its size. Being a concentration of economic and political power, Almaty attracts people from rural areas and neighboring states. Uncontrolled migration of the population leads to disproportional development of the city with inequality between the center and the periphery of the city. Rapid economic development and city growth led to increased per-capita water use and overall water demand and put pressure on water infrastructure. Such the foothill areas of Almaty, the southern part of the Nauryzbay, Bostandyk, and Medeu districts are experiencing a shortage of water supply due to low productivity, deterioration, or absence of networks and facilities. The city is located at the foothills of the northern Tien Shan Mountains in the valley of 4 rivers: Big and Small Almatinka, Esentay, and Kargaly. Climate change led to severe changes in Central Asia at high altitudes, including two times higher than the global average temperature rise and rapid glacier retreat. Shrinking glaciers supply le quantities of water in the form of increased glacial runoff, and reduced glacier volume will ultimately result in a decrease in both glacier-fed and total runoff. There is no reduction in streamflow in any catchment or season in the northern Tien Shan. Instead, there is a positive trend in surface water availability.& At the same time, climate change poses the risk of more prolonged recharge of reservoirs and aquifers and may cause exhaustion of this water source that currently provides 70% of water for the city. Therefore, envisioning a long-term sustainable development perspective for a city, water resource efficiency, and climate change adaptation should be addressed together. Thus, our study suggests for the short term to limit the use of strategic groundwater reserves and ersify the water supply sources with a bigger share of surface water to benefit from the melting glacials. If the water allocation from groundwater reservoirs will be reduced and the aquifers will be recharged the water deficit for the city may be postponed.& &
Publisher: Springer Science and Business Media LLC
Date: 18-09-2014
Publisher: MDPI AG
Date: 05-07-2018
DOI: 10.3390/W10070896
Publisher: IOP Publishing
Date: 18-12-2020
Abstract: Engineering, economic, social sciences, geophysical, and integrated modeling studies have approached the assessment of water security in Central Asia (CA) in distinct ways. Different indicators and indexes have been introduced to assess the most vulnerable aspects of water use in this region. Until now, though, the suggested approaches are often represented in a fragmented manner, while the relevant indicators cannot fully attribute the vulnerability status of a country or on a regional level. This can result in erging perceptions of the water security situation in policy dialogues, also affecting bilateral and multilateral relations among the countries in CA. In this study, we conduct a bibliometric review on the approaches and methods that directly or indirectly touch upon the water security perceptions in CA. We employ data mining techniques to explore trends in the conceptualization of water security in the region since the breakup of the Soviet Union by also identifying the water interests and priorities set by each country. The findings reveal that within the last decade, the water security-related studies have given much importance to technical and infrastructural means to protect human livelihoods against global environmental changes but also to foster economic growth. The water governance and management aspects are largely overlooked in favour of more techno-centric approaches. These findings are expected to clarify further the perception of the water security concept within CA by indicating the geophysical, institutional, and historical challenges that need to be met for a mutual understanding among the countries in the region.
Publisher: International Water Management Institute (IWMI).
Date: 2013
DOI: 10.5337/2013.207
Publisher: Elsevier BV
Date: 05-2007
Publisher: Informa UK Limited
Date: 22-01-2009
Publisher: Informa UK Limited
Date: 06-03-2023
Publisher: Elsevier BV
Date: 06-2007
Publisher: Informa UK Limited
Date: 04-11-2010
Publisher: Oxford University Press (OUP)
Date: 2021
DOI: 10.1093/JUE/JUAB020
Abstract: The urban conglomeration has accentuated the role of urban greenery as a determinant factor for sustainable living, especially in highly dense cities. The country of Singapore has consistently attempted to develop and rehabilitate urban greenery by attempting to align the green space policy with the pursuit of better life quality. In this study, we assess the benefits arising from the rehabilitated Bishan-Ang Mo Kio (AMK) Park in north Singapore and the effects on economic welfare. The Bishan-AMK Park was initially constructed in the late 70 s as a drainage area for the avoidance of flooding incidents. In 2012, a pilot project was introduced to create a blue-green infrastructure (BGI) space for the provision of drainage and flood prevention but also for recreational and environmental improvement in the area. Yet, the benefits emerging from BGI are not well explored and still underestimated. To this extent, we evaluate selected services related to recreational, socio-cultural and tourism-related values by indicating the economic benefits from the introduction of BGI in condensed urban environments like Singapore. The findings indicate that the benefits deriving from the selected services could be within the range of US$100 million to US$220 million with a mean value of US$160 million per year by substantially contributing to human well-being. The assessment of environmental services can raise the awareness of residents and local authorities on the contribution of urban greenery to livelihoods and economic development in Singapore and similar densely populated areas.
Publisher: MDPI AG
Date: 18-11-2019
DOI: 10.3390/SU11226496
Abstract: The exponential population growth in urban areas makes existing solid waste management policies and strategies challenging. The situation becomes more strenuous in fast-growing cities where increasing waste production can hardly be met by the capacity of existing facilities. Practices like waste prevention, recycling, reuse, and recovery are fundamental elements needed for the reduction of solid waste disposed in landfills, especially in fast-growing cities where more sustainable management practices need to be adopted. This study investigated the behavioral attitudes of citizens of the capital of Kazakhstan, Nur-Sultan (former Astana), towards household solid waste disposal and separation at the source. The survey was conducted through stratified random s ling during April and July of 2018 with the participation of 3281 respondents. It is the first attempt, to our knowledge, of assessing recycling trends in Kazakhstan from the household perspective. The results showed that 24% of respondents were already sorting household solid waste despite the absence of a separation system at the source. The study further demonstrated that separation at source could be effective if the local authorities were to introduce sound public awareness c aigns and install recycling bins in close proximity to residential buildings.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Stefanos Xenarios.