Water utilities are facing the challenging problem of planning rehabilitation and renewal of their urban water systems for an uncertain future, which will be affected by climate change, demographic changes and extensive changes in the way the public perceives the water services. For the purpose of envisioning the future, the multiple scenario approach is presented, and its benefits and drawbacks are discussed in relation to other futures forecasting methods. The paper guides the reader on how to build scenarios that represent plausible futures for renewal planning of urban water and wastewater networks. For this purpose, a table is produced that gives an overview of relevant scenarios and their potential consequences. In the end, a case study from a Norwegian perspective is presented that gives the reader an overview of the process of building scenarios based on both qualitative and quantitative approaches.

中文翻译：

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使用多情景方法在城市水管系统的长期规划和管理中预想可能的未来

自来水公司面临着充满挑战的问题，即为不确定的未来规划城市供水系统的修复和更新，这将受到气候变化，人口变化和公众对水服务方式的广泛变化的影响。为了预见未来，我们提出了多情景方法，并相对于其他期货预测方法讨论了它的优缺点。本文指导读者如何建立代表城市水和废水网络更新规划的合理未来的方案。为此，生成了一个表格，其中概述了相关方案及其潜在后果。到底，