*Review* **A Framework for Stormwater Quality Modelling under the E**ff**ects of Climate Change to Enhance Reuse**

### **Buddhi Wijesiri <sup>1</sup> , Erick Bandala <sup>2</sup> , An Liu <sup>3</sup> and Ashantha Goonetilleke 1,\***


Received: 15 October 2020; Accepted: 10 December 2020; Published: 14 December 2020

**Abstract:** Water scarcity, which is exacerbated by climate change, is a major challenge to ensure human well-being. Therefore, it is equally important to protect conventional water resources from degradation and at the same time to identify cost-effective alternatives with a low carbon footprint. In this regard, stormwater plays a key role as it is a largely under-utilised resource for both, potable and non-potable use. However, stormwater carries substantial loads of pollutants to receiving waters such as rivers. Unfortunately, the lack of comprehensive stormwater quality modelling strategies, which account for the effects of climate change, constrains the formulation of effective measures to improve the quality of stormwater. Currently, there is a significant knowledge gap in the merging of stormwater quality modelling and climate modelling. This paper critically reviews current stormwater quality modelling approaches (quantity and quality) and the role of climate modelling outputs in stormwater quality modelling. This is followed by the presentation of a robust framework to integrate the impacts of climate change with stormwater quality models.

**Keywords:** climate change; stormwater modelling; stormwater quality; stormwater reuse; water scarcity
