Your search found 8 records
1 Buechler, Stephanie; Mekala, Gayathri Devi. 2005. Local responses to water resource degradation in India: groundwater farmer innovations and the reversal of knowledge flows. Journal of Environment and Development, 14(4):410-438.
Irrigation water ; Groundwater ; Wastewater ; Water quality ; Water use ; Rice ; Farmers ; Wells / India / Musi River / Hyderabad
(Location: IWMI-HQ Call no: IWMI 631.7.5 G635 BUE Record No: H038272)
2 Buechler, Stephanie; Mekala, Gayathri Devi; Keraita, Ben. 2006. Wastewater use for urban and peri-urban agriculture. In van Veenhuizen, R. (Ed.). Cities farming for the future: Urban agriculture for green and productive Cities. Leusden, Netherlands: Network of Resource Centres on Urban Agriculture and Food Security (RUAF Foundation); Ottawa, Canada: International Development Research Centre (IDRC); Silang, Philippines: International Institute of Rural Reconstruction (IIRR). pp.244-260.
Water reuse ; Wastewater ; Urban agriculture ; Irrigation water ; Water quality ; Public health ; Risks ; Gender
(Location: IWMI-HQ Call no: 630 G000 VAN Record No: H039392)
(1.33 MB) (433KB)
3 Mekala, Gayathri Devi; Davidson, B.; Samad, Madar; Boland, A. M. 2008. Wastewater reuse and recycling systems: a perspective into India and Australia. Colombo, Sri Lanka: International Water Management Institute (IWMI) 35p. (IWMI Working Paper 128) [doi: https://doi.org/10.3910/2009.309]
Water reuse ; Recycling ; Costs ; Social aspects ; Water quality ; Water use ; Water balance ; Water market ; Pricing ; User charges ; Water scarcity ; Development projects ; Developing countries ; Developed countries / India / Australia
(Location: IWMI HQ Call no: 363.7284 G000 MEK Record No: H041343)
(1.27MB)
With issues of climate change, increase in urban population and the increased demand for water from competing sectors, wastewater recycling is becoming an important strategy to complement the existing water resources for both developing and developed countries. There are lessons, experiences, data and technology that can be shared for mutual benefit. The current paper is part of a doctoral research and presents a comprehensive literature review on the following issues in India and Australia: some key statistics of wastewater use and recycling; rationale for wastewater use; problems in promoting recycling; research gaps; economic characteristics of wastewater; wastewater markets and its future potential.
4 Mekala, Gayathri Devi; Davidson, B.; Samad, Madar; Boland, A. M. 2008. A framework for efficient wastewater treatment and recycling systems. Colombo, Sri Lanka: International Water Management Institute (IWMI) 17p. (IWMI Working Paper 129) [doi: https://doi.org/10.3910/2009.310]
Water reuse ; Wastewater ; Recycling ; Pricing ; Water allocation ; Cost benefit analysis ; Wastewater irrigation ; Developing countries ; Developed countries ; Case studies / India / Australia / Hyderabad / Melbourne
(Location: IWMI HQ Call no: 363.7284 G000 MEK Record No: H041344)
(320KB)
Use of un-treated/partially treated wastewater for irrigation in the dry countries of Asia and Africa and recycling of treated wastewater in the water scarce developed countries has become a common practice due to various reasons. While the lack of wastewater treatment to appropriate levels before use is a major problem in developing countries, the high cost of wastewater recycling is the major problem in developed countries. The current paper is part of a doctoral research and presents the conceptual framework for the research and the methodology that can be used to tackle the problems associated with wastewater recycling.
5 Mekala, Gayathri Devi; Davidson, B.; Samad, Madar; Boland, A. M. 2008. A framework for efficient wastewater treatment and recycling systems. Irrigation Australia Journal, 23(3):32-35.
Water reuse ; Recycling ; Wastewater management ; Wastewater treatment ; Cost benefit analysis ; Operating costs ; Wastewater irrigation ; Cost benefit analysis / Australia
(Location: IWMI HQ Call no: e-copy only Record No: H042323)
http://www.irrigation.org.au/assets/pages/8B72AA2E-0D5B-7F87-C14E1432EA655FF4/august2008finalPDF1.pdf
https://vlibrary.iwmi.org/pdf/H042323.pdf
https://vlibrary.iwmi.org/pdf/H042323.pdf
(0.15 MB)
The drought conditions of the past seven years in Australia and increasing environmental awareness have led to an active promotion of wastewater recycling. The absolute and relative cost of recycling is one of the key factors that will have a big influence on the future of wastewater recycling in Australia.
This article outlines the development of a toolkit/decision support tool for allocating wastewater among different sectors to achieve desired objectives in a cost-efficient way. It deals in particular with answering these questions: How can the cost-effectiveness of wastewater recycling be judged and budget allocated? For which sectors in a defined region will wastewater recycling be cost-efficient? Wastewater has a number of alternative uses and each alternative is associated with a set of costs from the point of treatment to the point of use. As a result, recycling can satisfy more than one objective such as: reduce the discharge of nutrients to natural water bodies, ave/substitute potable water, bring more land under cultivation, and save water for environmental purposes. The methodology chosen to evaluate the best alternative or alternatives is Cost-Effectiveness Analysis.
This article outlines the development of a toolkit/decision support tool for allocating wastewater among different sectors to achieve desired objectives in a cost-efficient way. It deals in particular with answering these questions: How can the cost-effectiveness of wastewater recycling be judged and budget allocated? For which sectors in a defined region will wastewater recycling be cost-efficient? Wastewater has a number of alternative uses and each alternative is associated with a set of costs from the point of treatment to the point of use. As a result, recycling can satisfy more than one objective such as: reduce the discharge of nutrients to natural water bodies, ave/substitute potable water, bring more land under cultivation, and save water for environmental purposes. The methodology chosen to evaluate the best alternative or alternatives is Cost-Effectiveness Analysis.
6 Mekala, Gayathri Devi; Davidson, B.; Boland, A. M. 2007. Economics of wastewater treatment and recycling: an investigation of conceptual issues. Paper presented at the 51st Annual Conference of Australian Agricultural and Resource Economics Society, Queenstown, New Zealand, 13-16 February 2007. 11p.
Water supply ; Water demand ; Population growth ; Water use ; Urban areas ; Water balance ; Wastewater ; Recycling ; Water quality ; Wastewater management ; Wastewater treatment ; Water allocation ; Pricing ; Economic aspects ; Cost benefit analysis / Australia
(Location: IWMI HQ Call no: e-copy only Record No: H042324)
(0.08 MB)
In the context of continuous droughts, the search for alternative water sources and increasing environmental restrictions on discharge of treated wastewater into natural water bodies, treated wastewater recycling offers a potential solution. In this paper the methods needed to assess the questions - to what extent treated wastewater can complement the existing water sources in different sectors and at what cost - are discussed? It was concluded that a comparative Benefit Cost Analysis of different combinations of uses and treatment levels would be a critical component in the development of a decision support tool which could be used by urban planners and water authorities. It was also found that community acceptance of recycled water, distribution of costs and benefits of recycling and its broader impact on regional development are issues that need to be considered, along with the economics of wastewater recycling.
7 Mekala, Gayathri Devi; Samad, Madar; Davidson, B.; Boland, A. M. 2009. Valuing a clean river: a case study of Musi River, Hyderabad, India. Paper presented at the 53rd Annual Conference of Australian Agricultural and Resource Economics Society, Cairns, Australia, 13-16 February 2009. 19p.
Rivers ; Water quality ; Valuation ; Cost recovery ; Surveys ; Water pollution ; Pollution control ; Wastewater treatment ; Wastewater management / India / Hyderabad / Musi River
(Location: IWMI HQ Call no: e-copy only Record No: H042325)
(0.24 MB)
The current study uses contingent valuation technique to estimate the value of clean water in river Musi in Hyderabad, India. The main source of pollution of the river is untreated domestic and industrial wastewater from the urban area of Hyderabad. Therefore, people’s Willingness To Pay [WTP] for the treatment of their wastewater to different quality levels (Level C, B & A) is estimated using a payment card method. Four variables were considered to influence the willingness to pay - number of years the household lived in Hyderabad; individual perceived importance of controlling water pollution; household income levels and proximity to the river. The results of the logistic regression confirmed that the variables - perceived importance of the respondent of controlling water pollution and household incomes have a significant influence on people’s WTP. Only 30% of the respondents were willing to pay for wastewater to be treated to level C. It was concluded from the survey results that 100% cost recovery of sewerage services and wastewater treatment would not be possible in Hyderabad in the current situation. However, a phased increase in the water tariffs accompanied with simultaneous improvements in service delivery mechanisms and awareness among consumers may be successful in the long-run.
8 Mekala, Gayathri Devi; Davidson, B. A.; Boland, A. 2007. Multiple uses of wastewater: a methodology for cost-effective recycling. In Khan, S. J.; Stuetz, R. M.; Anderson, J. M. (Eds.). Water reuse and recycling. Sydney, Australia: University of New South Wales (UNSW) Publishing and Printing Services. pp.335-343.
Wastewater ; Recycling ; Water reuse ; Cost benefit analysis ; Decision support tools ; Costs ; Pricing ; Multiple use / Australia / Melbourne
(Location: IWMI HQ Call no: e-copy only Record No: H042328)
(0.39 MB)
While wastewater recycling is being promoted to serve varied objectives, little or no research has been done on its economics. Given the fact that wastewater can be used in various sectors: agriculture, households, industry and recreation, the questions that need to be answered are – to what extent should wastewater be recycled, in which sectors and at what cost? A Cost-Effectiveness Analysis of wastewater recycling across the sectors will be done to assess the relative desirability of recycling in one sector over the other depending upon the objectives of stakeholders and budget constraints. Then a choice modelling technique will be used to weight the different objectives and to determine appropriate sectoral use of recycled wastewater. The methodology is currently in development stage and the research will be conducted using the case study of Melbourne where, wastewater is currently being recycled from the Western Treatment Plant and has been mandated to increase to 20 % by year 2010 through increased recycling in sectors other than agriculture. The results of the research can be used to develop a decision support tool which will help to determine the amount of wastewater that should be allocated to each sector depending upon the objective one wants to achieve. A further step in the research depending upon the objective i.e if the objective is to complement the urban water sources, would be to compare the cost-effectiveness of wastewater recycling versus other options like buying water on the market from the agricultural sector, tapping ground water resources, storm water, new catchments and rainwater recycling.
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