Abstract
In order to promote the efficient use of resources and the sustainable development of the economy in Jiangsu Province, it is particularly important to ease the contradiction between water supply and demand on the basis of realizing the coordinated development of the water–energy–food (WEF) nexus. With the aim of a dynamic balance of water resources, this paper used system dynamics (SD) to build a WEF nexus SD model that focused on studying the specific supply-and-demand mechanism of water resources in each subsystem. Then, Jiangsu Province was taken as an example to perform simulation research on the regional water dynamic balance to explore effective policies for increasing water supply and decreasing water demand. The results showed that the imbalance of water resources will remain severe in the next few years. To relieve the imbalance, it will be helpful to promote the energy utilization of straw, improve the irrigation efficiency, adjust the crop planting structure, and require residents to strictly follow the water quota. An important advancement in this study is the simulation of the water resources supply-and-demand mechanism in each subsystem from the perspective of the WEF nexus.
Highlights
Water, energy, and food are important basic resources for the survival and development of human beings, and they are necessary conditions and important supports for the sustainable development of society
This study built the WEF nexus system dynamics (SD) model with the goal of dynamic balance of the water resources by improving the scientific and efficient use of water in the process of energy and food production, we focused on the energy subsystem and the food subsystem in this study of how the water is used in energy and food production
This study set up six different scenarios for simulation research on the dynamic balance policies of water resources
Summary
Energy, and food are important basic resources for the survival and development of human beings, and they are necessary conditions and important supports for the sustainable development of society. There is a close and intricate relationship among water, energy, and food; they coordinate with each other to form a multi-variable coupling, reciprocal, dynamic system, and the coordinated development of them will play a positive role in human survival and development under the widely accepted background of global warming, which is associated with climate change and vegetation phenology [1]. As a province that has abundant water resources, consumes a large quantity of energy, and is a major food-producing region, Jiangsu Province has faced an increasingly serious problem of imbalance in the supply and demand of water resources under the influence of discordant development of the water–energy–food nexus in the context of population growth, resource shortages, and environmental degradation. Large amounts of water are consumed in the process of
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