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Book (stand-alone)Manual / guideREWAS - REal WAter Savings tool 2025
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No results found.Water shortages in the Asia-Pacific region critically impact food security, as irrigated agriculture accounts for nearly 90 percent of freshwater withdrawals. The lack of reliable freshwater for irrigation directly affects farmer productivity and incomes. Traditionally, efforts to save water in agriculture have focused on improving irrigation techniques (e.g. drip irrigation, sprinklers). However, evidence shows that while these methods reduce water withdrawals, they often lead to increased water consumption at a larger scale. Instead of focusing solely on field-level water savings, it is crucial to consider water availability for other sectors, which is known as "real water savings."To bridge this gap, the REal WAter Savings (REWAS) tool was developed. It provides a practical approach for evaluating the larger-scale impacts of field-level crop-watering interventions. Based on FAO's principles of water accounting and productivity, the REWAS tool emphasizes the reuse of drainage, runoff, and groundwater percolation by downstream users rather than viewing them as losses.This document explains the concepts underlying the REWAS tool and provides examples of its successful application in various contexts. It also offers guidelines for assessing the basin-scale water savings of field experiments. By applying these concepts, stakeholders and decision-makers can better manage agricultural water systems at a broader scale, leading to real water savings across regions. -
No Thumbnail AvailableBook (stand-alone)Technical reportIrrigation technology transfer in support of food security. (Water Reports - 14) 1997
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Book (series)FlagshipThe State of Food Security and Nutrition in the World 2021
Transforming food systems for food security, improved nutrition and affordable healthy diets for all
2021In recent years, several major drivers have put the world off track to ending world hunger and malnutrition in all its forms by 2030. The challenges have grown with the COVID-19 pandemic and related containment measures. This report presents the first global assessment of food insecurity and malnutrition for 2020 and offers some indication of what hunger might look like by 2030 in a scenario further complicated by the enduring effects of the COVID-19 pandemic. It also includes new estimates of the cost and affordability of healthy diets, which provide an important link between the food security and nutrition indicators and the analysis of their trends. Altogether, the report highlights the need for a deeper reflection on how to better address the global food security and nutrition situation.To understand how hunger and malnutrition have reached these critical levels, this report draws on the analyses of the past four editions, which have produced a vast, evidence-based body of knowledge of the major drivers behind the recent changes in food security and nutrition. These drivers, which are increasing in frequency and intensity, include conflicts, climate variability and extremes, and economic slowdowns and downturns – all exacerbated by the underlying causes of poverty and very high and persistent levels of inequality. In addition, millions of people around the world suffer from food insecurity and different forms of malnutrition because they cannot afford the cost of healthy diets. From a synthesized understanding of this knowledge, updates and additional analyses are generated to create a holistic view of the combined effects of these drivers, both on each other and on food systems, and how they negatively affect food security and nutrition around the world.In turn, the evidence informs an in-depth look at how to move from silo solutions to integrated food systems solutions. In this regard, the report proposes transformative pathways that specifically address the challenges posed by the major drivers, also highlighting the types of policy and investment portfolios required to transform food systems for food security, improved nutrition, and affordable healthy diets for all. The report observes that, while the pandemic has caused major setbacks, there is much to be learned from the vulnerabilities and inequalities it has laid bare. If taken to heart, these new insights and wisdom can help get the world back on track towards the goal of ending hunger, food insecurity, and malnutrition in all its forms. -
Book (series)FlagshipThe State of Food Security and Nutrition in the World 2022
Repurposing food and agricultural policies to make healthy diets more affordable
2022This year’s report should dispel any lingering doubts that the world is moving backwards in its efforts to end hunger, food insecurity and malnutrition in all its forms. We are now only eight years away from 2030, but the distance to reach many of the SDG 2 targets is growing wider each year. There are indeed efforts to make progress towards SDG 2, yet they are proving insufficient in the face of a more challenging and uncertain context. The intensification of the major drivers behind recent food insecurity and malnutrition trends (i.e. conflict, climate extremes and economic shocks) combined with the high cost of nutritious foods and growing inequalities will continue to challenge food security and nutrition. This will be the case until agrifood systems are transformed, become more resilient and are delivering lower cost nutritious foods and affordable healthy diets for all, sustainably and inclusively. -
Book (stand-alone)Technical bookClimate change and food security: risks and responses 2015
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End hunger, achieve food security and improve nutrition are at the heart of the sustainable development goals. The World has committed to eradicate extreme poverty and hunger by 2030. But climate change is undermining the livelihoods and food security of the rural poor, who constitute almost 80 percent of the world’s poor. The effects of climate change on our ecosystems are already severe and widespread. Climate change brings a cascade of impacts from agroecosystems to livelihoods. Climate change impacts directly agroecosystems, which in turn has a potential impact on agricultural production, which drives economic and social impacts, which impact livelihoods. In other words, impacts translate from climate to the environment, to the productive sphere, to economic and social dimensions. Therefore, ensuring food security in the face of climate change is among the most daunting challenges facing humankind. Action is urgently needed now to reduce vulnerability and increase resilience of food systems to ensure food security and good nutrition for all.