Asa River is the most important river that serves as a cheaper and easier disposal alternative to industries and at the same time as a less expensive and dependable water supply to farmers for the production of vegetables in dry season in Ilorin, the capital city of Kwara State, Nigeria. To investigate the effect of Asa River water pollution on water-soil-plant copper (Cu) mobility, a two factor factorial in randomized complete block design (RCBD) survey was conducted. The factors comprised of Factor A: distance between irrigation water sources and Factor B: irrigation history (irrigation duration in years). Four (4) farming locations, which corresponded to a control location 200 m upstream (– 200 m location), 200, 400 and 600 m downstream were selected. At each location, 4 farmers with different irrigation history were selected and the study was replicated thrice. The irrigation history was 0, 10, 20 and 30 years of irrigation with Asa river water. The results indicated that Cu levels in Asa River obtained 600 m downstream of control location, exceeded permissible limits with levels as high as 4.51 mg/L. Soil and plant tissue Cu concentrations were also found to exceed permissible levels, with plant tissue Cu reaching as high as 81.86 mg/kg in Corchorus olitorius.

We analyzed the consumptive water reduction of diet shifting along with food waste reductions in the case of the United States. We find that a dietary shift to healthy diet will not always lead to reduced water footprint. Dietary shifts to vegan and vegetarian diets provide larger reduction in the consumptive water footprint. Reducing food loss and waste produced the largest potential water footprint reduction in our analysis of the US food system. Our findings suggest that a combination of measures that include dietary shift, reducing caloric intake, and reducing food waste result in a significant decline in water footprint.

Research on water cooperation in the Eastern Nile Basin has focused on expanding policy and diplomacy tools for a better allocation of transboundary water resources confined to the river. Regional cooperation on water and related sectors such as energy and land expands the bargaining and areas for mutual gain, and thus enhances cooperation perspectives. This paper looks at the contribution and the potential benefits of a regional cooperation approach to addressing the underlying challenges of water diplomacy, such as complexity and distrust. It also promotes the understanding of river basins as a ?resource basin? of integrated and linked resource-use issues, not always related to the river flow. The paper provides an analysis of priority issues for water?energy?food nexus in regional cooperation in the Eastern Nile Basin. This basin represents an illustrative case for regional cooperation and increased integration due to multiple comparative advantages inherent in the uneven endowments of water, energy and arable land resources, and to varying levels of economic and technological advancement among the three riparian countries: Egypt, Sudan and Ethiopia. The paper also analyzes institutional arrangements on a regional scale, and elaborates on the inherent trade-offs associated with them. ? 2018 Elsevier B.V. | Scopus

The growing demand for traceable and reliable results in analytical chemistry can be illustrated with the growth in ISO/IEC 17025 accreditation. Among different technical requirements in this quality system, the use of CRMs is highlighted because of its applications in many operations, such as method validation, proficiency tests, estimation of the uncertainties and quality control.Over the past several years, there has been an increased need to use different types of CRMs in chemical analysis, new CRM publications about its developments and certification. This paper proposes to show a detailed review considering the development of certified reference materials (CRM) for chemical analysis, focusing on food, water, soil and sediment matrices. An evaluation of the trends and best-applied practices in its development in the last 2 years was performed, to guide new developments for this material that is increasingly necessary to laboratories.

The recognition of the interlinked nature of water, energy and food (WEF) resources has resulted in growing momentum to change the approaches for managing these interlinked resources. Initially, models were developed as a mean of integrated methodology for watershed management. Several frameworks and models have been proposed to help policymakers understand the complexity of the nexus and to assist with planning and regulating these resources. Most countries and governments manage these natural resources with different institutions that have their own mission and objectives, and with their own staff, data, measures and tools. This has mostly led to huge variations in terms of methodological approach to design these models, type of data used and eventually results interpretations and policies design.We conducted a review of current literature on the water–energy–food nexus to understand what’s known and what’s missing and identify key opportunities and challenges facing WEF design and modeling. Our analysis also identified the followings: • Our review reveals that there are a limited number of models and frameworks that address all WEF together and there are even fewer models and frameworks that has diverse methods and transdisciplinary approaches in analyzing the nexus. It’s essential as we design out modeling tools to analyze the nexus to incorporate several dimensions beyond the WEF sectors such as political, social and economic in order to reach nexus thinking and therefore address complexity of the multi-sectoral resources. • Agricultural sectors require significant amounts of energy as an input to production, yet few water–energy–food resource planning approaches have incorporated spatial cropping patterns and land use by combining energy and water requirements. • Policymakers are provided with an effective way to analyze the nexus on an aggregate level using macro-drivers, but these often omit the complexity of managing the resources at a smaller scale where other factors such as climate and geography have tremendous influence on supply and demand. • There are knowledge gaps pertaining the incorporation of spatial–temporal drivers as well as the spatial–temporal dynamics of resource availability or accessibility. This is a significant component in the WEF framework design as natural resources are subject to dramatic changes over space and time. • There are a considerable number of WEF framework and models that demonstrate promising tools to analyze the nexus but some of these models fall short of capturing interactions among nexus components due to lack of data sharing and availability.The increased regional and global variation in natural resources distribution over time and space creates a need to develop more sophisticated models that incorporate these drivers to support the planning and regulatory policy process. These models should also be flexible enough to be applied at varying geographic levels to support resource management at the national, regional, watershed and project levels. Integrating spatial–temporal drivers would result in more comprehensive models that can deliver better policies for sustainable development, increase synergies between institutions and improve social welfare. Keywords: Water, Energy, Food, Policy, Framework

Water, energy and food are essential resources for economic development and social well-being. Framing integrated policies that improve their efficient use requires understanding the interdependencies in the water–energy–food (WEF) nexus. Stakeholder involvement in this process is crucial to represent multiple perspectives, ensure political legitimacy and promote dialogue. In this research, we develop and apply a participatory modelling approach to identify the main interlinkages within the WEF nexus in Andalusia, as a starting point to developing a system dynamic model at a later stage. The application of fuzzy cognitive mapping enabled us to gain knowledge on the WEF nexus according to opinions from 14 decision-makers, as well as contributing to raising awareness and building consensus among stakeholders. Results show that climate change and water availability are key drivers in the WEF nexus in Andalusia. Other variables with significant interlinkages within the WEF nexus are food production, irrigated agriculture, energy cost, socio-economic factors, irrigation water use, environmental conservation, and farm performance indicators. The scenario analysis reveals the interdependencies among nexus sectors and the existence of unanticipated effects when changing variables in the system, which need to be considered to design integrated policies.

Um pressuposto fundamental para o sucesso dessa iniciativa é que as pessoas compreendam que não estão lidando apenas com uma tecnologia e sim com um sistema com vários componentes interligados, destacando-se o biológico e a água, e que a intervenção humana é determinante para o nível de eficiência do mesmo.

Um pressuposto fundamental para o sucesso dessa iniciativa é que as pessoas compreendam que não estão lidando apenas com uma tecnologia e sim com um sistema com vários componentes interligados, destacando-se o biológico e a água, e que a intervenção humana é determinante para o nível de eficiência do mesmo.

Using a multi-disciplinary approach, this paper integrated spatial analysis with agricultural and energy system modelling to assess the impacts of drought on crop water demand, water availability, crop yield, and electricity requirements for irrigation. This was done by a novel spatially-explicit and integrated water-food-energy nexus model, using the spatial climatic data generated by the mesoscale MESAN and STRÅNG models. In this study, the model was applied to quantify the effects of drought on the Swedish irrigation sector in 2013, a typical drought year, for a specific crop. The results show that drought can severely affect the crop yield if irrigation is not applied, with a peak yield reduction of 18 t/ha, about 50 % loss as compared to the potential yield in irrigated conditions. Accordingly, the water and energy requirements for irrigation to halt the negative drought effects and maintain high yields are significant, with the peaks up to 350 mm and 700 kWh per hectare. The developed model can be used to provide near real-time guidelines for a comprehensive drought management system. The model also has significant potentials for applications in precision agriculture, especially using high-resolution satellite data.

Water, energy, food, land and climate form a tightly-connected nexus in which actions on one sector impact other sectors, creating feedbacks and unanticipated consequences. This is especially because at present, much scientific research and many policies are constrained to single discipline/sector silos that are often not interacting (e.g., water-related research/policy). However, experimenting with the interaction and determining how a change in one sector could impact another may require unreasonable time frames, be very difficult in practice and may be potentially dangerous, triggering any one of a number of unanticipated side-effects. Current modelling often neglects knowledge from practice. Therefore, a safe environment is required to test the potential cross-sectoral implications of policy decisions in one sector on other sectors. Serious games offer such an environment by creating realistic ‘simulations’, where long-term impacts of policies may be tested and rated. This paper describes how the ongoing (2016–2020) Horizon2020 project SIM4NEXUS will develop serious games investigating potential plausible cross-nexus implications and synergies due to policy interventions for 12 multi-scale case studies ranging from regional to global. What sets these games apart is that stakeholders and partners are involved in all aspects of the modelling definition and process, from case study conceptualisation, quantitative model development including the implementation and validation of each serious game. Learning from playing a serious game is justified by adopting a proof-of-concept for a specific regional case study in Sardinia (Italy). The value of multi-stakeholder involvement is demonstrated, and critical lessons learned for serious game development in general are presented.