The urban water-energy nexus sits at the intersection of the global phenomena of water scarcity, energy transitions and urbanisation. Research found that end use dominates the water-energy nexus and that this component plays an important role in urban dynamics, but focussed on the Global North. We investigate the nexus of Mumbai and its long-term resource demand. Our tool is a novel system dynamics model representing the urban water-energy nexus and takes into account characteristics such as intermittent water supply and the presence of slums. We devised scenarios around the Sustainable Development Goals and the Swachh Bharat Mission. The model shows that both can be achieved while saving on future water system infrastructure investments compared to business-as-usual. We find that also in Mumbai end use dominates the nexus. Representing end-use interactions increases expected water demand. This work indicates that globally, sustainable development of infrastructure must consider the urban water-energy nexus.

城市水能关系处于全球水资源短缺，能源过渡和城市化现象的交汇处。研究发现，最终用途主导着水能关系，这一组成部分在城市动态中起着重要作用，但主要集中在全球北部。我们调查孟买的关系及其长期资源需求。我们的工具是代表城市水能源关系的新型系统动力学模型，并考虑了间歇性供水和贫民窟的存在等特征。我们围绕可持续发展目标和Swachh Bharat任务设计了方案。该模型显示，与以往相比，既可以实现上述目标，又可以节省未来水系统基础设施的投资。我们发现，在孟买，最终用途也占主导地位。代表最终用途的相互作用会增加预期的需水量。这项工作表明，在全球范围内，基础设施的可持续发展必须考虑到城市水能关系。