While water-energy-food (WEF) Nexus is one of the most important, and widely investigated, environmental topics of our time, previous stock taking efforts possess notable limitations, namely (i) their focus is restricted to research articles, and (ii) there is less focus on nexus permutations that begin with energy and food. This paper assembled more than 900 documents and systematically categorized them according to more than 10 key parameters (e.g. scale, methods, limitations), to characterize approaches, achieved outcomes and presence of variables likely to support on-the-ground change.

The polders in coastal zones of Bangladesh are vulnerable to climate risks resulting in low agricultural productivity and low incomes for the communities dependent on agriculture-based livelihoods in these regions. Bangladesh adopted a participatory approach to water governance in the 1980s to improve the equitable and sustainable use of water resources. With men migrating away for better income opportunities, women are more involved in agricultural production and dependent on water resources.

Sustainable water management requires evidence-based information on the current and future states of water resources. This study presents a comprehensive modelling framework that integrates the fully distributed mesoscale Hydrologic Model (mHM) and climate change scenarios with the Water Accounting Plus (WA+) tool to anticipate future water resource challenges and provide mitigation measures in the transboundary Volta River basin (VRB) in West Africa. The mHM model is forced with a large ensemble of climate change projection data from CORDEX-Africa.

The CORIGAP project was implemented in six main rice granaries in South and Southeast Asia. The project introduced several country-specific sustainable best management practices, including nutrient management, pest management, water management, and several postharvest technologies, among other specific practices. This chapter introduces each country and its respective challenges to rice production. It outlines cultivation practices, historical developments, and their impacts on opportunities for the development of the rice sector.

Study region: Lake Tana sub-basin of the Upper Blue Nile River Basin, Ethiopia. Study focus: Groundwater use for small-scale irrigation is increasing in the Lake Tana sub-basin. However, the abstraction amount and its impact are not well understood. In this study, a new methodological approach was utilized to estimate the irrigation water abstraction amount, which is based on groundwater level monitoring before, during, and at the end of the irrigation season (2021/2022).

This policy brief — produced under the CGIAR Initiative on Asian Mega-Deltas (AMD) — emphasizes the urgent need for promoting inclusive governance in Bangladesh's agri-food systems to enhance resilience in the face of escalating climate risks. Although Bangladesh is transitioning toward climate-resilient agri-food systems, this shift faces challenges. There is notable variation among policies and interventions pertaining to food, water and environmental systems in their acknowledgment of socio-ecological interdependencies and representation of marginalized communities.

In what is proclaimed as the ‘fourth industrial revolution’, digital innovation is thought to have the potential to provide solutions to key challenges facing food production and consumption together with the support of sustainability of the underpinning support of land, and water systems. Nowhere is this more the case in less-industrialised countries, which largely have agrarian based economies.

On 6 February 2022, the African Union’s (AU's) Climate Change and Resilient Development
Strategy and Action Plan (2022-2032) was endorsed at the 35th Ordinary Session of the

Agri-food systems face multiple challenges. They must deal with prevailing structural weaknesses, partly deepened by the disruptions from the COVID-19 pandemic, civil conflicts, and climate change. Addressing structural weaknesses – such as inequitable access to healthy and nutritious food for all, loss of livelihoods and incomes, and increasing environmental shocks – requires not only technological, but also institutional innovations, as well as economic and policy responses.

In the recent campaign leading up to the presidential election of July 9, 2023 in Uzbekistan, the incumbent president pledged to ensure the implementation of water-saving technologies across all irrigated lands by 2030. This ambitious initiative aims to revolutionize the country’s agricultural sector by replacing old water-intensive irrigation practices with a mix of modern innovative technologies, such as drip irrigation or laser land leveling.

As we embark on the 'fourth industrial revolution', digital innovation emerges as a promising solution to critical challenges in food production, consumption, and the supportive triad of food, land, and water systems. This potential is particularly pronounced in less industrialised, agrarian-based economies. Digital advancements promise enhanced communication, improved data management, democratic and transparent governance, accessible financial services, and decision-making support.

Small water infrastructure in Nigeria needs to be utilized more efficiently. There are over 900 small reservoirs across the country. Many of these have yet to be put to productive use within the Ogun watershed in the Ogun Osun River Basin. This study investigates the challenges and opportunities for improving the use of small reservoirs for farmer-led irrigation in a sustainable way.