scholarly journals FEASIBILITY STUDY ON INTRODUCTION OF HYBRID SYSTEM FOR WATER SUPPLY FROM THE VIEW POINTS OF WATER UTILITIES' FINANCE AND RESIDENTS' EXPENSE IN DEVELOPING COUNTRIES

Author(s):  
Toshiyuki SHIMIZU ◽  
Taichi NISHIDA ◽  
Soichi MURAKAMI ◽  
Kiyoshi YAMADA
2015 ◽  
Vol 03 (09) ◽  
pp. 70-83 ◽  
Author(s):  
Luis E. Teixeira ◽  
Johan Caux ◽  
Alexandre Beluco ◽  
Ivo Bertoldo ◽  
José Antônio S. Louzada ◽  
...  

1991 ◽  
Vol 23 (1-3) ◽  
pp. 201-209 ◽  
Author(s):  
W. Kreisel

Water quality can affect human health in various ways: through breeding of vectors, presence of pathogenic protozoa, helminths, bacteria and viruses, or through inorganic and organic chemicals. While traditional concern has been with pathogens and gastro-intestinal diseases, chemical pollutants in drinking-water supplies have in many instances reached proportions which affect human health, especially in cases of chronic exposure. Treatment of drinking-water, often grossly inadequate in developing countries, is the last barrier of health protection, but control at source is more effective for pollution control. Several WHO programmes of the International Drinking-Water Supply and Sanitation Decade have stimulated awareness of the importance of water quality in public water supplies. Three main streams have been followed during the eighties: guidelines for drinking-water quality, guidelines for wastewater reuse and the monitoring of freshwater quality. Following massive investments in the community water supply sector to provide people with adequate quantities of drinking-water, it becomes more and more important to also guarantee minimum quality standards. This has been recognized by many water and health authorities in developing countries and, as a result, WHO cooperates with many of them in establishing water quality laboratories and pollution control programmes.


2005 ◽  
Vol 5 (2) ◽  
pp. 123-134 ◽  
Author(s):  
R. Miller ◽  
B. Whitehill ◽  
D. Deere

This paper comments on the strengths and weaknesses of different methodologies for risk assessment, appropriate for utilisation by Australian Water Utilities in risk assessment for drinking water source protection areas. It is intended that a suggested methodology be recommended as a national approach to catchment risk assessment. Catchment risk management is a process for setting priorities for protecting drinking water quality in source water areas. It is structured through a series of steps for identifying water quality hazards, assessing the threat posed, and prioritizing actions to address the threat. Water management organisations around Australia are at various stages of developing programs for catchment risk management. While much conceptual work has been done on the individual components of catchment risk management, work on these components has not previously been combined to form a management tool for source water protection. A key driver for this project has been the requirements of the National Health and Medical Research Council Framework for the Management of Drinking Water Quality (DWQMF) included in the draft 2002 Australian Drinking Water Guidelines (ADWG). The Framework outlines a quality management system of steps for the Australian water industry to follow with checks and balances to ensure water quality is protected from catchment to tap. Key steps in the Framework that relate to this project are as follows: Element 2 Assessment of the Drinking Water Supply System• Water Supply System analysis• Review of Water Quality Data• Hazard Identification and Risk Assessment Element 3 Preventive Measures for Drinking Water Quality Management• Preventive Measures and Multiple Barriers• Critical Control Points This paper provides an evaluation of the following risk assessment techniques: Hazard Analysis and Critical Control Points (HACCP); World Health Organisation Water Safety Plans; Australian Standard AS 4360; and The Australian Drinking Water Guidelines – Drinking Water Quality Management Framework. These methods were selected for assessment in this report as they provided coverage of the different approaches being used across Australia by water utilities of varying: scale of water management organisation; types of water supply system management; and land use and activity-based risks in the catchment area of the source. Initially, different risk assessment methodologies were identified and reviewed. Then examples of applications of those methods were assessed, based on several key water utilities across Australia and overseas. Strengths and weaknesses of each approach were identified. In general there seems some general grouping of types of approaches into those that: cover the full catchment-to-tap drinking water system; cover just the catchment area of the source and do not recognise downstream barriers or processes; use water quality data or land use risks as a key driving component; and are based primarily on the hazard whilst others are based on a hazardous event. It is considered that an initial process of screening water quality data is very valuable in determining key water quality issues and guiding the risk assessment, and to the overall understanding of the catchment and water source area, allowing consistency with the intentions behind the ADWG DWQM Framework. As such, it is suggested that the recommended national risk assessment approach has two key introductory steps: initial screening of key issues via water quality data, and land use or activity scenario and event-based HACCP-style risk assessment. In addition, the importance of recognising the roles that uncertainty and bias plays in risk assessments was highlighted. As such it was deemed necessary to develop and integrate uncertainty guidelines for information used in the risk assessment process. A hybrid risk assessment methodology was developed, based on the HACCP approach, but with some key additions and modifications to make it applicable to varying catchment risks, water supply operation needs and environmental management processes.


Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 602
Author(s):  
Stavroula Tsitsifli ◽  
Anastasia Papadopoulou ◽  
Vasilis Kanakoudis ◽  
Konstantinos Gonelas

Water use efficiency is a crucial issue in drinking water utilities as it is connected to environmental and economic consequences. WATenERgy CYCLE project aims at developing a methodological approach towards efficient and effective transnational water and energy resources management in the Balkan–Mediterranean area. The paper presents the results of performance evaluation of the water supply systems of the water utilities involved in the project, both at local and national level. The methodology used in the water balance and performance indicators as well as data on the operational status of the water supply systems. The results showed that Non-Revenue Water is one of the major problems addressed.


Author(s):  
Sanford V. Berg

Organizations regulating the water sector have major impacts on public health and the sustainability of supply to households, industry, power generation, agriculture, and the environment. Access to affordable water is a human right, but it is costly to produce, as is wastewater treatment. Capital investments required for water supply and sanitation are substantial, and operating costs are significant as well. That means that there are trade-offs among access, affordability, and cost recovery. Political leaders prioritize goals and implement policy through a number of organizations: government ministries, municipalities, sector regulators, health agencies, and environmental regulators. The economic regulators of the water sector set targets and quality standards for water operators and determine prices that promote the financial sustainability of those operators. Their decisions affect drinking water safety and sanitation. In developing countries with large rural populations, centralized water networks may not be feasible. Sector regulators often oversee how local organizations ensure water supply to citizens and address wastewater transport, treatment, and disposal, including non-networked sanitation systems. Both rural and urban situations present challenges for sector regulators. The theoretical rationale for water-sector regulation address operator monopoly power (restricting output) and transparency, so customers have information regarding service quality and operator efficiency. Externalities (like pollution) are especially problematic in the water sector. In addition, water and sanitation enhance community health and personal dignity: they promote cohesion within a community. Regulatory systems attempt to address those issues. Of course, government intervention can actually be problematic if short-term political objectives dominate public policy or rules are established to benefit politically powerful groups. In such situations, the fair and efficient provision of water and sanitation services is not given priority. Note that the governance of economic regulators (their organizational design, values or principles, functions, and processes) creates incentives (and disincentives) for operators to improve performance. Related ministries that provide oversight of the environment, health and safety, urban and housing issues, and water resource management also influence the long-term sustainability of the water sector and associated health impacts. Ministries formulate public policy for those areas under their jurisdiction and monitor its implementation by designated authorities. Ideally, water-sector regulators are somewhat insulated from day-to-day political pressures and have the expertise (and authority) to implement public policy and address emerging sector issues. Many health issues related to water are caused or aggravated by lack of clean water supply or lack of effective sanitation. These problems can be attributed to lack of access or to lack of quality supplied if there is access. The economic regulation of utilities has an effect on public health through the setting of quality standards for water supply and sanitation, the incentives provided for productive efficiency (encouraging least-cost provision of quality services), setting tariffs to provide cash flows to fund supply and network expansion, and providing incentives and monitoring so that investments translate into system expansion and better quality service. Thus, although water-sector regulators tend not to focus directly on health outcomes, their regulatory decisions determine access to safe water and sanitation.


2012 ◽  
Vol 16 (10) ◽  
pp. 3791-3816 ◽  
Author(s):  
C. Dondeynaz ◽  
C. Carmona Moreno ◽  
J. J. Céspedes Lorente

Abstract. The "Integrated Water Resources Management" principle was formally laid down at the International Conference on Water and Sustainable development in Dublin 1992. One of the main results of this conference is that improving Water and Sanitation Services (WSS), being a complex and interdisciplinary issue, passes through collaboration and coordination of different sectors (environment, health, economic activities, governance, and international cooperation). These sectors influence or are influenced by the access to WSS. The understanding of these interrelations appears as crucial for decision makers in the water sector. In this framework, the Joint Research Centre (JRC) of the European Commission (EC) has developed a new database (WatSan4Dev database) containing 42 indicators (called variables in this paper) from environmental, socio-economic, governance and financial aid flows data in developing countries. This paper describes the development of the WatSan4Dev dataset, the statistical processes needed to improve the data quality, and finally, the analysis to verify the database coherence is presented. Based on 25 relevant variables, the relationships between variables are described and organised into five factors (HDP – Human Development against Poverty, AP – Human Activity Pressure on water resources, WR – Water Resources, ODA – Official Development Aid, CEC – Country Environmental Concern). Linear regression methods are used to identify key variables having influence on water supply and sanitation. First analysis indicates that the informal urbanisation development is an important factor negatively influencing the percentage of the population having access to WSS. Health, and in particular children's health, benefits from the improvement of WSS. Irrigation is also enhancing Water Supply service thanks to multi-purpose infrastructure. Five country profiles are also created to deeper understand and synthetize the amount of information gathered. This new classification of countries is useful in identifying countries with a less advanced position and weaknesses to be tackled. The relevance of indicators gathered to represent environmental and water resources state is questioned in the discussion section. The paper concludes with the necessity to increase the reliability of current indicators and calls for further research on specific indicators, in particular on water quality at national scale, in order to better include environmental state in analysis to WSS.


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