Water Papers

183 items available

Permanent URI for this collection

http://hdl.handle.net/10986/16997

Water Papers are produced by the Water Global Practice, taking up the work of the predecessor Water Unit, Transport, Water and ICT Department, Sustainable Development Vice Presidency.

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Now showing 1 - 10 of 141

Determinants of Declining Water Quality

(World Bank, Washington, DC, 2019-12-19) Ayana, Essayas

This is a background paper for "Quality Unknown: The Invisible Water Crisis." (Report No. 140973)This review examines determinants of poor water quality and natural and anthropomorphic factors determining water quality. It also discusses various water quality parameter measurement tools that can be applied in situ or remotely to assess water quality easily so measurements can be used to evaluate the economic impact of poor water quality. The correlation of water quality indicators to determinants (natural or anthropogenic) is also summarized based on the abundance of literature supporting the relationship. In doing so, this paper takes a thematic approach and applied the following search phrases to the literature review: "determinants of (parameter) in surface water," "drivers of (parameter) in surface water," and "remote sensing techniques to estimate (parameter)."
Policy Instruments for Water Pollution Control in Developing Countries

(World Bank, Washington, DC, 2019-12-10) Olmstead, Sheila ; Zheng, Jiameng

This paper surveys the economic theory behind regulatory and other solutions to the stark ambient water pollution problems that exist in many developing countries, and what is known from the empirical economics literature about the effectiveness of these solutions.
The Impact of Water Quality on GDP Growth: Evidence from Around the World

(World Bank, Washington, DC, 2019-12-10) Desbureaux, Sebastien ; Damania, Richard ; Rodella, Aude-Sophie ; Russ, Jason ; Zaveri, Esha

Declining water quality can impact the economy in various ways. Impacts can be found in the health sector, where labor productivity can be affected, in agriculture, where the quality and quantity of food produced can be reduced, and in tourism, real estate, aquaculture/fisheries and other sectors which rely on environmental quality and ecosystem services. Despite these well-known impacts, finding economy-wide affects of water quality on economic activity can be elusive. In this paper we attempt to fill this gap by using a conventional empirical approach in contemporary environmental economics and new data on economic activity and water quality for nineteen countries from 1990-2014. The authors find that when rivers become very heavily polluted, regions downstream see reductions in economic growth, losing between 0.8 and 2.0 percent of economic growth. These losses imply that in many places, the costs of environmental degradation are severely under-estimated and well above efficient levels.
Salt of the Earth: Quantifying the Impact of Water Salinity on Global Agricultural Productivity

(World Bank, Washington, DC, 2019-12-10) Russ, Jason ; Damania, Richard ; Desbureaux, Sebastien ; Escurra, Jorge ; Rodella, Aude-Sophie ; Zaveri, Esha

Salinity in surface waters is on the rise throughout much of the world. Many factors contribute to this change including increased water extraction, poor irrigation management, and sea-level rise. To date no study has attempted to quantify impacts on global food production. In this paper we develop a plausibly causal model to test the sensitivity of global and regional agricultural productivity to changes in water salinity. To do so, we utilize several local and global datasets on water quality and agricultural productivity and a model which isolates the impact of exogenous changes in water salinity on yields. We then train a machine learning model to predict salinity globally in order to simulate average global food losses from 2000-2013. These losses are found to be high, in the range of the equivalent of 124 trillion kilocalories, or enough to feed over 170 million people every day, each year. Global maps building on these results show that pockets of high losses occur on all continents but can be expected to be particularly problematic in regions already experiencing malnutrition challenges.
The Nitrogen Legacy: The Long-Term Effects of Water Pollution on Human Capital

(World Bank, Washington, DC, 2019-12-10) Zaveri, Esha ; Russ, Jason ; Desbureaux, Sebastien ; Damania, Richard ; Rodella, Aude-Sophie ; Ribeiro, Giovanna

The fallout of nitrogen pollution is considered one of the largest global externalities facing the world, impacting air, water soil and human health. This paper presents new evidence that nitrogen pollution in water is an important determinant of variations in human capital. Data from the Demographic and Health Survey dataset across India, Vietnam, and 33 African countries are combined to analyze the causal links between pollution exposure experienced during the very earliest stages of life and later-life health. Results show that pollution exposure experienced in the critical years of development from the period of birth up until year three – is associated with decreased height as an adult, a well-known indicator of overall health and productivity, and is robust to several statistical checks. Because adult height is related to education, labor productivity, and income, this also implies a loss of earning potential. Results are consistent and show that early-life exposure to nitrogen pollution in water can lower height-for-age scores during childhood in Vietnam and during infancy in Africa. These findings add to the evidence on the enduring consequences of water pollution and identify a critical area for policy intervention.
Wastewater: From Waste to Resource – The Case of Arequipa, Peru

(World Bank, Washington, DC, 2019-12-10) World Bank

SEDAPAR S.A. (Servicio de Aqua Potable y Alcantarillado de Arequipa) is one of the public service enterprises in Peru. It is a limited liability company owned by 8 provincial municipalities and 26 district municipalities in Arequipa Department. It provides water and sanitation services to the metropolitan area of Arequipa and a large part of the department. SEDAPAR serves over 1.1 million inhabitants through 280,000 connections. Coverage ratios are over 94 percent for water and over 80 percent for sanitation services. SEDAPAR is the second-largest utility in Peru in terms of population served—after Sedapal in Lima—and is the largest in terms of coverage area. Arequipa Department, at a size of 63,345 square kilometers (k
Wastewater: From Waste to Resource – The Case of Nagpur, India

(World Bank, Washington, DC, 2019-12-10) World Bank

Water stress has become a problem in most Indian cities, as rapid population growth increases simultaneously water demand by households, industries, and power plants. Utilities need to meet this growing demand while ensuring fair tariffs for users and promoting a sustainable use of water resources. As federal and state governments look for innovative alternatives to freshwater, the reuse of treated wastewater is gaining attention and being promoted at the federal and state levels. In addition to the environmental, health, and social benefits of treating wastewater; treated wastewater can become a reliable water source for industrial users, freeing up freshwater resources for households and helping address water scarcity in big cities. The government of India has taken steps to promote wastewater reuse, starting with the regulation of industrial water consumption and the setting and enforcement of mandatory water reuse targets for industries. The national target is to treat and reuse 50 percent of total wastewater by 2022 (PwC 2016). Some cities have set their own, more ambitious targets, and states such as Gujarat (Government of Gujarat, 2018) and Maharashtra (IndianExpress, 2017) have implemented new policies to promote wastewater reuse. Moreover, the government of India has adopted policies, established strong mechanisms of regulation, and provided funding for various programs, such as the Jawaharlal Nehru National Urban Renewal Mission (JNNURM), to enable municipal authorities to enter into public-private partnership (PPP) arrangements to attract private funding. As a result, municipalities across the country have started to implement wastewater reuse projects. Most of these initiatives are led by utilities, through partnerships with the private sector, and with the central government covering part of the capital costs. The success of these projects reveals that wastewater reuse activities can be viable if properly structured and supported by enabling policies and institutions.
The Cubango-Okavango River Basin Multi-Sector Investment Opportunities Analysis: Summary Report

(World Bank, Washington, DC, 2019-12-01) World Bank

The Cubango-Okavango River Basin is one of the world's most unique, near pristine free-flowing rivers, and central to sustainable economic development within the arid landscapes of southern Africa. The complex flood pulse cycle provides important services for local communities while supporting a rich and unique biodiversity that makes it a wetland of international importance and World Heritage site. However, the commitments to peace and prosperity among the three countries—Angola, Botswana, and Namibia—and the broader efforts of the Southern African Development Community to facilitate greater regional integration provide prospects for increased and improved development. The Multi-Sector Investment Opportunities Analysis is part of a systematic strategy by the Permanent Okavango River Basin Water Commission, a body established in 1994 by Angola, Botswana, and Namibia, to promote coordinated and sustainable water resources management, while addressing the legitimate social and economic needs of the member states. The environmental integrity and long-term protection of the basin depends on addressing the underlying drivers of poverty. Accelerated environmental changes in the basin are largely driven by four factors—population dynamics, land use change, poverty, and climate change—leading to deterioration in water quality, changes in the flood pulse and diminishing biota. As a result, the risks associated with persistent poverty threaten the long-term sustainability of the basin.
Watershed: A New Era of Water Governance in China - Thematic Report

(World Bank, Washington, DC, 2019-12-01) World Bank

Each of the chapters presented in this report is based on a series of 15 thematic reports. They provided the basis for the joint identification of key priority reforms by the World Bank and China that were bought together and published in an accompanying Synthesis Report. Topics included: (1) overview of water governance in China; (2) evaluation of China’s water security status and issues; (3) advancing water quality markets in China; (4) macro-economic impacts of water scarcity and redlines in China; (5) re-examining the Three Red Lines Policy; (6) water rights verifications and transactions; (7) best practices in cost-benefit analysis for water investments; (8) water prices, taxes, and fees; (9) flood risk management and protection; (10) ecology compensation and governance; (11) legal reform for water governance; (12) China’s water management administrative system and its reform; (13) technical innovation and development of an information platform in China; (14) Public Private Partnerships and water governance in China; (15) summary and overall design of China’s water governance system. These discussions emphasized key issues for water governance in China, including the need for a stronger legislative foundation for water governance; enhanced basin-scale governance institutions; harmonization of existing policy tools, such as water permits and water rights; better information and data-sharing; and the need to promote ecosystem resilience. Based on these consultations and discussions, a final set of 15 key recommendations have been put forward. These recommendations form the core of the accompanying Synthesis Report. Each priority area is the subject of a separate chapter focusing on the rationale for each of the policy recommendations, drawing on research completed by each study team.
Water and Sanitation Services for Informal Settlements in Honiara, Solomon Islands

(World Bank, Washington, DC, 2019-10) World Bank

The objective of this study was to inform Solomon Water of potential service delivery models for the expansion of water and sanitation services in informal settlements in Honiara. Currently, a range of water service delivery models are in use by residents of settlements. As described below, many of do not result in safe and affordable drinking and domestic water. Similarly, a range of sanitation practices are in use, most are not likely to result in safe containment of human waste. Solomon Water is currently expanding and improving its water and sanitation services in Honiara, and other regional towns urban center's. As a part of this improvement and expansion agenda, there is the opportunity to improve the water and sanitation services used by residents of informal settlements. In recognition of the diversity of environmental, social and economic diversity amongst urban residents in Honiara’s informal settlements, a range of water and sanitation service delivery models may need to be offered. This assessment identifies the range of possible water and sanitation service models, and, with input from Solomon Water, informal settlement residents and other stakeholders, together with analytical information and lessons about service delivery models used elsewhere, makes recommendations about the water and sanitation service options best suited to informal Honiara’s settlements.