Rapid urbanization poses great challenges to water-energy-food nexus (WEF-Nexus) system, calling for integrative resources governance to improve the synergies between subsystems that constitute the Nexus. This paper explores the synergies within the WEF-Nexus in Shenzhen city while using the synergetic model. We first identify the order parameters and their causal paths in three subsystems and set several eigenvectors under each parameter. Secondly, a synergetic model is developed to calculate the synergy degree among parameters, and the synergetic networks are then further constructed. Centrality analysis on the synergetic networks reveals that the centralities of food subsystem perform the highest level while the water subsystem at the lowest level. Finally, we put forward some policy implications for cross-sectoral resources governance by embedding the synergy degree into causal paths. The results show that the synergies of the Nexus system in Shenzhen can be maximized by stabilizing water supply, coordinating the energy imports and exports, and reducing the crops sown areas.

Rapid urbanization poses great challenges to water-energy-food nexus (WEF-Nexus) system, calling for integrative resources governance to improve the synergies between subsystems that constitute the Nexus. This paper explores the synergies within the WEF-Nexus in Shenzhen city while using the synergetic model. We first identify the order parameters and their causal paths in three subsystems and set several eigenvectors under each parameter. Secondly, a synergetic model is developed to calculate the synergy degree among parameters, and the synergetic networks are then further constructed. Centrality analysis on the synergetic networks reveals that the centralities of food subsystem perform the highest level while the water subsystem at the lowest level. Finally, we put forward some policy implications for cross-sectoral resources governance by embedding the synergy degree into causal paths. The results show that the synergies of the Nexus system in Shenzhen can be maximized by stabilizing water supply, coordinating the energy imports and exports, and reducing the crops sown areas.

Rapid urbanization poses great challenges to water-energy-food nexus (WEF-Nexus) system, calling for integrative resources governance to improve the synergies between subsystems that constitute the Nexus. This paper explores the synergies within the WEF-Nexus in Shenzhen city while using the synergetic model. We first identify the order parameters and their causal paths in three subsystems and set several eigenvectors under each parameter. Secondly, a synergetic model is developed to calculate the synergy degree among parameters, and the synergetic networks are then further constructed. Centrality analysis on the synergetic networks reveals that the centralities of food subsystem perform the highest level while the water subsystem at the lowest level. Finally, we put forward some policy implications for cross-sectoral resources governance by embedding the synergy degree into causal paths. The results show that the synergies of the Nexus system in Shenzhen can be maximized by stabilizing water supply, coordinating the energy imports and exports, and reducing the crops sown areas.

The article takes hydro-development schemes in the Upper Blue Nile Basin of Ethiopia as an example to discuss the suitability and shortcomings of nexus approaches for the analysis of complex socio-ecological transformations. Based on critical theoretical debates and extensive field research in Ethiopia, the paper broadens the nexus perspective by integrating the three analytical dimensions of time, space, and power. The empirical material comes from a case study of the Fincha-Amerti-Neshe scheme that was implemented in three consecutive stages over almost half a century, combining dams, hydro-power plants, large-scale sugar cane plantations, and a factory for sugar production. The empirical findings follow the historical stages of the scheme and their physical outcomes, which affected much more than just water, energy, and food. The paper explores socio-ecological transformations along the analytical dimensions of time, scale, and power. First, it views time and temporality as essential aspects of change and calls for a more systematic recognition of the historical context out of which development trajectories and current nexus situations have emerged. Second, it takes a cross-scalar perspective to explain how local land use is influenced by regional and global drivers. And third, it emphasizes the importance of asymmetric power structures to explain the dynamics of hydro-developments and their social consequences. In conclusion, the paper calls for a “nexus-plus” perspective that is more sensitive to the historical and cross-scalar embeddedness of hydro-development, and which enables more inclusive and fair governance of scarce resources.

The article takes hydro-development schemes in the Upper Blue Nile Basin of Ethiopia as an example to discuss the suitability and shortcomings of nexus approaches for the analysis of complex socio-ecological transformations. Based on critical theoretical debates and extensive field research in Ethiopia, the paper broadens the nexus perspective by integrating the three analytical dimensions of time, space, and power. The empirical material comes from a case study of the Fincha-Amerti-Neshe scheme that was implemented in three consecutive stages over almost half a century, combining dams, hydro-power plants, large-scale sugar cane plantations, and a factory for sugar production. The empirical findings follow the historical stages of the scheme and their physical outcomes, which affected much more than just water, energy, and food. The paper explores socio-ecological transformations along the analytical dimensions of time, scale, and power. First, it views time and temporality as essential aspects of change and calls for a more systematic recognition of the historical context out of which development trajectories and current nexus situations have emerged. Second, it takes a cross-scalar perspective to explain how local land use is influenced by regional and global drivers. And third, it emphasizes the importance of asymmetric power structures to explain the dynamics of hydro-developments and their social consequences. In conclusion, the paper calls for a &ldquo:nexus-plus&rdquo: perspective that is more sensitive to the historical and cross-scalar embeddedness of hydro-development, and which enables more inclusive and fair governance of scarce resources.

The article takes hydro-development schemes in the Upper Blue Nile Basin of Ethiopia as an example to discuss the suitability and shortcomings of nexus approaches for the analysis of complex socio-ecological transformations. Based on critical theoretical debates and extensive field research in Ethiopia, the paper broadens the nexus perspective by integrating the three analytical dimensions of time, space, and power. The empirical material comes from a case study of the Fincha-Amerti-Neshe scheme that was implemented in three consecutive stages over almost half a century, combining dams, hydro-power plants, large-scale sugar cane plantations, and a factory for sugar production. The empirical findings follow the historical stages of the scheme and their physical outcomes, which affected much more than just water, energy, and food. The paper explores socio-ecological transformations along the analytical dimensions of time, scale, and power. First, it views time and temporality as essential aspects of change and calls for a more systematic recognition of the historical context out of which development trajectories and current nexus situations have emerged. Second, it takes a cross-scalar perspective to explain how local land use is influenced by regional and global drivers. And third, it emphasizes the importance of asymmetric power structures to explain the dynamics of hydro-developments and their social consequences. In conclusion, the paper calls for a “nexus-plus” perspective that is more sensitive to the historical and cross-scalar embeddedness of hydro-development, and which enables more inclusive and fair governance of scarce resources.

The estimated, effective increase of agricultural fertilizer applied in China by 10.57 Mts from 2006 to 2016 is a crucial factor affecting the water environment. Based on analyzing the nitrate-leaching rate, the nitrogen-fertilizer application rate, and crop yield in wheat and maize key cultivation divisions in China, this paper applied the grey water footprint analytical method to estimate THE grey water footprint and its proportion to total water footprint and analyzed the spatial differences from 2012 to 2016. Results showed that the grey water footprint of wheat was higher in North and Northwest China with an increasing trend, while that of maize was higher in Southwest and Northwest China because of high nitrogen application rates and low yields in these regions. Except for the Southwestern division, wheat’s grey water footprint was about 1.3 times higher than the blue water footprint, while, for maize, it was two to three times higher. When analyzing and planning water demand for crop irrigation, the water required for nonpoint source pollution due to chemical fertilizers should be considered. Focusing blue water (irrigation) alone, while neglecting green water and ignoring grey water footprints, it might lead to overestimation of available agricultural water resources and failure to meet the goals of sustainable use of water resources.

The estimated, effective increase of agricultural fertilizer applied in China by 10.57 Mts from 2006 to 2016 is a crucial factor affecting the water environment. Based on analyzing the nitrate-leaching rate, the nitrogen-fertilizer application rate, and crop yield in wheat and maize key cultivation divisions in China, this paper applied the grey water footprint analytical method to estimate THE grey water footprint and its proportion to total water footprint and analyzed the spatial differences from 2012 to 2016. Results showed that the grey water footprint of wheat was higher in North and Northwest China with an increasing trend, while that of maize was higher in Southwest and Northwest China because of high nitrogen application rates and low yields in these regions. Except for the Southwestern division, wheat&rsquo:s grey water footprint was about 1.3 times higher than the blue water footprint, while, for maize, it was two to three times higher. When analyzing and planning water demand for crop irrigation, the water required for nonpoint source pollution due to chemical fertilizers should be considered. Focusing blue water (irrigation) alone, while neglecting green water and ignoring grey water footprints, it might lead to overestimation of available agricultural water resources and failure to meet the goals of sustainable use of water resources.

The estimated, effective increase of agricultural fertilizer applied in China by 10.57 Mts from 2006 to 2016 is a crucial factor affecting the water environment. Based on analyzing the nitrate-leaching rate, the nitrogen-fertilizer application rate, and crop yield in wheat and maize key cultivation divisions in China, this paper applied the grey water footprint analytical method to estimate THE grey water footprint and its proportion to total water footprint and analyzed the spatial differences from 2012 to 2016. Results showed that the grey water footprint of wheat was higher in North and Northwest China with an increasing trend, while that of maize was higher in Southwest and Northwest China because of high nitrogen application rates and low yields in these regions. Except for the Southwestern division, wheat’s grey water footprint was about 1.3 times higher than the blue water footprint, while, for maize, it was two to three times higher. When analyzing and planning water demand for crop irrigation, the water required for nonpoint source pollution due to chemical fertilizers should be considered. Focusing blue water (irrigation) alone, while neglecting green water and ignoring grey water footprints, it might lead to overestimation of available agricultural water resources and failure to meet the goals of sustainable use of water resources.