Transdisciplinarity (TD) is now recognized as one of several core approaches to sustainability science. Efforts over the last decade have led to the conceptualization of transdisciplinary endeavors and the definition of practices that define the fundamental ambition and aspiration of TD. Nevertheless, while the principles defining transdisciplinary research are increasingly clear, the practice and disparate contexts of TD often receive a less critical examination. The ideal of research co-design and knowledge co-production is particularly challenging —although arguably particularly salient— in the highly contested, highly politicized, urgent, yet also uncertain settings of many sustainability problems.

In this paper, we use the case of an international, transdisciplinary project to explore some of the challenges in scientist-stakeholder interactions in addressing a truly wicked sustainability problem in Mexico City: chronic flooding and water scarcity. We argue that in cases such as that of water risk in Mexico City, clear and transparent procedural – or algorithmic -- approaches can serve as robust mechanisms for integrating disparate knowledge. When linked to “boundary objects” such as the geographic support decision-making system used in our work, procedural approaches enabled our team to illustrate the interdependence of disparate actors' values, decision priorities and actions, and the effect of these interdependencies on the city's vulnerability. We contend that the realities of countries like Mexico compel the implementation of “transgressive TD” to push the frontiers of sustainability rather than reinforce pre-existing (and unsustainable) patterns and paradigms.

跨学科（TD）现在被认为是可持续性科学的几种核心方法之一。过去十年的努力导致了跨学科工作的概念化，以及定义了TD基本抱负和抱负的实践的定义。然而，尽管定义跨学科研究的原则越来越清晰，但TD的实践和不同背景通常受到的批评较少。在竞争激烈，政治化，紧迫且不确定的环境中，许多可持续发展问题的研究共同设计和知识共同生产的理想尤其具有挑战性（尽管可以说特别突出）。

在本文中，我们以国际跨学科项目为例，探讨了科学家与利益相关方互动中的一些挑战，以解决墨西哥城一个真正邪恶的可持续性问题：长期洪水和水资源短缺。我们认为，在诸如墨西哥城的水风险之类的情况下，应制定清晰，透明的程序或算法-方法可以用作整合不同知识的强大机制。当与诸如我们工作中使用的地理支持决策系统之类的“边界对象”链接时，程序方法使我们的团队能够说明不同行为者的价值观，决策优先级和行动之间的相互依存关系，以及这些相互依存关系对城市发展的影响。脆弱性。我们认为，像墨西哥这样的国家的现实迫使实施“侵略性TD”以推动可持续发展的前沿，而不是加强先前存在的（和不可持续的）模式和范式。