Low-impact development (LID) control feasibility in a small-scale urban catchment for altered climate change scenarios

ABSTRACT

Rainfall is considered a major input in designing stormwater management measures, especially for any low-impact development (LID) control design. With the impact of climate change, rainfall frequency and its patterns are changing continuously. Quantification of these changes and their impact on the performance of LID design becomes crucial. This paper presents a methodology to quantify the change in rainfall patterns using the Coupled Model Intercomparison Project 5 (CMIP5) climate model and to select the most feasible LID for a catchment with haphazard development. Interconnected decentralization-based LID controls are evaluated with the objective of emulating a pre-urbanized scenario. The overall analyses indicated that green roof (GR) followed by infiltration trenches (IT), rooftop disconnection (RTD), and permeable pavement (PP) showed better performance. Furthermore, a combination of IT, PP, and RTD accomplishes better efficiency for extreme rainfall events. Implementation of the most feasible combination will provide the additional benefit of water recycle and reuse.

KEYWORDS:

• urban stormwater management
• LID controls
• climate change
• rainfall disaggregation
• SWMM

Editor A. Castellarin; Associate Editor E. Davies

Editor A. Castellarin; Associate Editor E. Davies

Acknowledgements

The authors are thankful to IMD, the VIT Estate office and Google Earth for providing various types of support during the completion of the present work. We also acknowledge that there was no funding agency involved in the study and all the data used are open source and freely available on the websites mentioned in the study. Finally, we thank the reviewers and the editor for their profound and constructive comments.

Disclosure statement

No potential conflict of interest was reported by the authors.

Ethics declaration

The authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest (such as personal or professional relationships) in the subject matter or materials discussed in this article.

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/02626667.2023.2239797