Water, energy, and food (WEF) scarcity has been realized as a global issue, and several strategies have been proposed to solve this problem. The WEF Nexus is a novel concept in resources management that integrates and considers feedback connections of water, energy, and food production and consumption in a single framework. The discussion of WEF Nexus commonly involves several parties with different backgrounds and expertise to decide sustainable management plan. This paper introduces a computer simulation model to calculate the supply and consumption, availability, and reliability of water, energy, and food resources on a nationwide scale considering the interconnections of resources. Developed based on a system dynamics algorithm, the Water-Energy-Food Nexus Simulation Model (WEFSiM) simulated the nationwide resources nexus implementing the changes of energy policy in South Korea and capital investment planning of urban water systems in Indonesia. Successfully calculating the reliability index of resources and evaluating the feedback analysis in both case studies, WEFSiM can investigate resource security under plausible future conditions, and stakeholders possibly could utilize it as a decision support tool.

水，能源和食物（WEF）的短缺已经成为一个全球性问题，并且已经提出了几种解决该问题的策略。WEF Nexus是资源管理中的一个新颖概念，它在单个框架中集成并考虑了水，能源以及食品生产和消费的反馈关系。对WEF Nexus的讨论通常涉及具有不同背景和专业知识的多个方来确定可持续管理计划。本文介绍了一种计算机模拟模型，该模型考虑了资源的相互关系，在全国范围内计算了水，能源和粮食资源的供应和消耗，可用性和可靠性。基于系统动力学算法开发的 水-能源-食品联系模拟模型（WEFSiM）模拟了实施韩国能源政策变化和印度尼西亚城市供水系统的资本投资计划的全国资源关系。在两个案例研究中，成功​​地计算了资源的可靠性指标并评估了反馈分析，WEFSiM可以在合理的未来条件下调查资源安全性，利益相关者可以将其用作决策支持工具。