Despite the importance of nutrient-water interactions, they are often ignored in analysis. After discussing the interrelationships between soil nutrients and water and reviewing methods for determining nutrient balances, this report describes an array of available methods for soil nutrient valuation and provides a discussion of four nutrient valuation studies, which together cover a range of scales, perspectives, and geographic contexts. It also includes case studies from Ghana, Mexico, sub-Saharan Africa, and an examination of possible approaches to valuing soil organic matter and its various functions--an often ignored area in literature.
Mohamed Aheeyar, International Water Management Institute, Colombo, Sri Lanka Nilanthi Jayathilake, International Water Management Institute, Colombo, Sri Lanka Camelia Bucatariu, Food and Agricultural Organization of the United Nations, Rome, Italy Maren Reitemeier, International Water Management Institute, Colombo, Sri Lanka Ayomi Bandara, International Water Management Institute, Colombo, Sri Lanka Felix Thiel, International Water Management Institute, Colombo, Sri Lanka Pay Drechsel, International Water Management Institute, Colombo, Sri Lanka
This report tries to provide a state-of-the-art overview on irrigated urban agriculture in the West African subregion based on a comprehensive literature review supported by the results of three IWMI FAO projects.
Impacts of increasing population pressure on food demand and land and water resources have sparked interest in nutrient and water balances and flows at a range of scales. In IWMI Research Report 115, it was tried for the first time to quantify rural-urban food flows for selected cities in Ghana and Burkina Faso to analyse their dependency on food supplied from rural vs. peri-urban vs. urban farming. Both, the urban nutrient and water footprints are closely interlinked. Currently, 80-95 percent of the domestic water used and the nutrients consumed go to waste without treatment or resource recovery. The economic dimensions are significant. Options to reduce the environmental burden by closing the rural-urban water and nutrient cycles are discussed.
About the Resource Recovery & Reuse Series Resource Recovery and Reuse (RRR) is a subprogram of the CGIAR Research Program on Water, Land and Ecosystems (WLE) dedicated to applied research on the safe recovery of water, nutrients and energy from domestic and agro-industrial waste streams. This subprogram aims to create impact through different lines of action research, including (i) developing and testing scalable RRR business models, (ii) assessing and mitigating risks from RRR for public health and the environment, (iii) supporting public and private entities with innovative approaches for the safe reuse of wastewater and organic waste, and (iv) improving rural-urban linkages and resource allocations while minimizing the negative urban footprint on the peri-urban environment. This subprogram works closely with the World Health Organization (WHO), Food and Agriculture Organization of the United Nations (FAO), United Nations Environment Programme (UNEP), United Nations University (UNU) and many national and international partners across the globe. The RRR series of documents presents summaries and reviews of the subprogram’s research and resulting application guidelines, targeting development experts and others in the research for development continuum.
Resource Recovery and Reuse (RRR) is a subprogram of the CGIAR Research Program on Water, Land and Ecosystems (WLE) dedicated to applied research on the safe recovery of water, nutrients and energy from domestic and agro-industrial waste streams. This subprogram aims to create impact through different lines of action research, including (i) developing and testing scalable RRR business models, (ii) assessing and mitigating risks from RRR for public health and the environment, (iii) supporting public and private entities with innovative approaches for the safe reuse of wastewater and organic waste, and (iv) improving rural-urban linkages and resource allocations while minimizing the negative urban footprint on the peri-urban environment. This subprogram works closely with the World Health Organization (WHO), Food and Agriculture Organization of the United Nations (FAO), United Nations Environment Programme (UNEP), United Nations University (UNU) and many national and international partners across the globe. The RRR series of documents presents summaries and reviews of the subprogram’s research and resulting application guidelines, targeting development experts and others in the research for development continuum.
With increasing change of traditional diets, and the emergence of new supply and marketing chains, urban food consumers in low-income countries are faced with multiple food safety challenges, among which microbial contamination and pesticides are key concerns for fruits and vegetables sold on urban markets in West Africa. Although consumers have a genuine interest in healthy food, and are willing to pay premiums, their interpretation of food quality and risks deviates from scientific health risk assessments and does not translate into recommended risk mitigation behavior. To safeguard public health, alternative measures are needed to support consumers’ risk awareness and decision making. The review looked at common and less-common options to trigger and support behavioral change, including safety labeling (certification), corporate social responsibility models, incentive systems and social marketing of safe practices, to address potential food safety risks from farming in urban and peri-urban areas. Overall, it appears that regulatory measures for risk management, including certifications, will be – for now – less effective in the West African setup due to low educational levels in view of chemical and microbial risk, diverse and often informal food chains, poor safety supporting infrastructure and weak institutional capacities for compliance monitoring.
This report explores and analyses the governance framework (i.e. policies, laws, and regulations) relevant to urban food waste (FW) prevention and reduction in the wholesale, retail, hospitality (restaurants, hotels), food services (schools, hospitals), and households in Sri Lanka. The project Innovative approaches to reduce, recycle and reuse food waste in urban Sri Lanka was implemented from June 2019 to August 2021 under the oversight of the Ministry of Urban Development and Housing and in collaboration with the Food and Agriculture Organization of the United Nations (FAO) and the International Water Management Institute (IWMI). Sri Lanka generates around 7 000 tonnes of solid waste per day. From the total solid waste generated, approximately 65–66 percent, by weight, is organic waste. The proportion of food waste (FW) generated in a local authority (LA) area ranges from 50–69 percent of the total waste with an average of 56.56 percent. According to this average value, the estimated total FW generated in the country is around 3 955 tonnes per day. The country faces many challenges in tackling the FW issue also due to gaps in governance. Governance analysis allows a comprehensive understanding of state and non-state challenges and solutions towards FW prevention and reduction. Currently, the governance framework for food safety and quality and (bio-)waste management is under the umbrella of the central government, provincial council (PC), and local authorities (LAs). Additionally, several central and provincial government agencies perform tasks related to (bio-)waste management. Under the 13th amendment made to the constitution of 1987, LAs are under the purview of PCs. The PCs are responsible to help and guide the LAs in the execution of waste and sanitation-related activities. The PCs are empowered to make all decisions on capacity building, resource allocation, adoption of provincial-level policies, and establishing appropriate institutional arrangements to handle the delegated tasks of waste management.
Mohamed Aheeyar, International Water Management Institute, Colombo, Sri Lanka Nilanthi Jayathilake, International Water Management Institute, Colombo, Sri Lanka Camelia Bucatariu, Food and Agricultural Organization of the United Nations, Rome, Italy Maren Reitemeier, International Water Management Institute, Colombo, Sri Lanka Ayomi Bandara, International Water Management Institute, Colombo, Sri Lanka Felix Thiel, International Water Management Institute, Colombo, Sri Lanka Pay Drechsel, International Water Management Institute, Colombo, Sri Lanka
Resource Recovery and Reuse (RRR) is a subprogram of the CGIAR Research Program on Water, Land and Ecosystems (WLE) dedicated to applied research on the safe recovery of water, nutrients and energy from domestic and agro-industrial waste streams. This subprogram aims to create impact through different lines of action research, including (i) developing and testing scalable RRR business models, (ii) assessing and mitigating risks from RRR for public health and the environment, (iii) supporting public and private entities with innovative approaches for the safe reuse of wastewater and organic waste, and (iv) improving rural-urban linkages and resource allocations while minimizing the negative urban footprint on the peri-urban environment. This subprogram works closely with the World Health Organization (WHO), Food and Agriculture Organization of the United Nations (FAO), United Nations Environment Programme (UNEP), United Nations University (UNU) and many national and international partners across the globe. The RRR series of documents presents summaries and reviews of the subprogram’s research and resulting application guidelines, targeting development experts and others in the research for development continuum.
This report tries to provide a state-of-the-art overview on irrigated urban agriculture in the West African subregion based on a comprehensive literature review supported by the results of three IWMI FAO projects.
About the Resource Recovery & Reuse Series Resource Recovery and Reuse (RRR) is a subprogram of the CGIAR Research Program on Water, Land and Ecosystems (WLE) dedicated to applied research on the safe recovery of water, nutrients and energy from domestic and agro-industrial waste streams. This subprogram aims to create impact through different lines of action research, including (i) developing and testing scalable RRR business models, (ii) assessing and mitigating risks from RRR for public health and the environment, (iii) supporting public and private entities with innovative approaches for the safe reuse of wastewater and organic waste, and (iv) improving rural-urban linkages and resource allocations while minimizing the negative urban footprint on the peri-urban environment. This subprogram works closely with the World Health Organization (WHO), Food and Agriculture Organization of the United Nations (FAO), United Nations Environment Programme (UNEP), United Nations University (UNU) and many national and international partners across the globe. The RRR series of documents presents summaries and reviews of the subprogram’s research and resulting application guidelines, targeting development experts and others in the research for development continuum.
Despite the importance of nutrient-water interactions, they are often ignored in analysis. After discussing the interrelationships between soil nutrients and water and reviewing methods for determining nutrient balances, this report describes an array of available methods for soil nutrient valuation and provides a discussion of four nutrient valuation studies, which together cover a range of scales, perspectives, and geographic contexts. It also includes case studies from Ghana, Mexico, sub-Saharan Africa, and an examination of possible approaches to valuing soil organic matter and its various functions--an often ignored area in literature.
This volume presents a historical-sociolinguistic description and analysis of Maritime Polynesian Pidgin. It offers linguistic and sociohistorical substantiation for a regional Eastern Polynesian-based pidgin, and challenges conventional Eurocentric assumptions about early colonial contact in the eastern Pacific by arguing that Maritime Polynesian Pidgin preceded the introduction of Pidgin English by as much as a century. Emanuel J. Drechsel not only opens up new methodological avenues for historical-sociolinguistic research in Oceania by a combination of philology and ethnohistory, but also gives greater recognition to Pacific Islanders in early contact between cultures. Students and researchers working on language contact, language typology, historical linguistics and sociolinguistics will want to read this book. It redefines our understanding of how Europeans and Americans interacted with Pacific Islanders in Eastern Polynesia during early encounters and offers an alternative model of language contact.
Impacts of increasing population pressure on food demand and land and water resources have sparked interest in nutrient and water balances and flows at a range of scales. In IWMI Research Report 115, it was tried for the first time to quantify rural-urban food flows for selected cities in Ghana and Burkina Faso to analyse their dependency on food supplied from rural vs. peri-urban vs. urban farming. Both, the urban nutrient and water footprints are closely interlinked. Currently, 80-95 percent of the domestic water used and the nutrients consumed go to waste without treatment or resource recovery. The economic dimensions are significant. Options to reduce the environmental burden by closing the rural-urban water and nutrient cycles are discussed.
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