IJARP International Journal of Architecture and Planning 2788-5046 SvedbergOpen ijarp-1-1-002 10.51483/IJARP.1.1.2021.9-18 Research Paper Are green infrastructure strategies suitable in arid climates? a design feasibility study from Jeddah city, Saudi Arabia BogisAbdulmueen 1 * BorkDean 2 MillerPatrick 3 1Ph.D. Scholar in Architecture and Design Research - Virginia Tech, MLA, BLA, Teacher Assistant, Landscape Architecture Department, Abdulaziz University, Saudi Arabia. E-mail: bogis@vt.edu 2Associate Professor, Landscape Architecture Program, Virginia Tech, United States. E-mail: drbork@vt.edu 3Ph.D., FASLA, FCELA Professor of Landscape Architecture and Associate Dean for Graduate Studies and Outreach College of Architecture and Urban Studies, Virginia Tech, United States. E-mail: pmiller@vt.edu *Corresponding author: Abdulmueen Bogis, Ph.D. Scholar in Architecture and Design Research, Virginia Tech, MLA, BLA, Teacher Assistant, Landscape Architecture Department, Abdulaziz University, Saudi Arabia. E-mail: bogis@vt.edu 03 2021 1 1 9 18 Abstract

This paper describes the feasibility and probable benefits associated with greening the Tahliah Channel, a concrete drainage channel that was originally built to relieve urban flooding in Jeddah city, Saudi Arabia. It includes an estimation of irrigation needs for channel greening based on a standardized planting specification. The study also demonstrates alternative strategies for meeting the required irrigation demand, including water harvesting and graywater reuse on a residential scale. The study shows that greening Tahliah Channel is possible relying mainly on graywater reuse from the surrounding buildings. Also, the study shows that rainwater harvesting is not a reliable source for irrigation. Rather, it can cover only part of the irrigation needs (6%) and so can be used as a secondary supporting source. The positive results of this case study will be of interest to those in arid countries who are looking to upgrade and replace traditional, single function drainage infrastructure with more sustainable, green infrastructure systems. More specifically, the objectives of the study are consistent with the goals of the Saudi government’s ongoing initiative that advocates for more resilient and sustainable cities (Vision 2030 year).

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