Co‐development of an integrated assessment framework to evaluate the effectiveness and impact of selected nature‐based water treatment technologies in Sri Lanka, The Philippines, and Vietnam

Water quality is a critical challenge in Asia in the context of growing industrialization, urbanization, and climate change. Nature‐based solutions (NbS) could play an important role in reducing urban water pollution, while generating multiple co‐benefits that could make cities more liveable and res...

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Published in:Environmental quality management 2023-03, Vol.32 (3), p.335-365
Main Authors: Jegatheesan, Veeriah, Pachova, Nevelina, Velasco, Perlie, Mowjood, Mohamed Ismail Mohammed, Weragoda, Sujithra Kaushaliya, Makehelwala, Madhubhashini, Trang, Ngo Thuy Diem, Dang, Bao‐Trong, Tran, Cong‐Sac, Vo, Thi‐Kim‐Quyen, Trang, Nguyen Thi Thu, Pham, Huy, Devanadera, Ma. Catriona, Torrens, Antonina, Bui, Xuan‐Thanh, Nguyen, Phuoc‐Dan, Lecciones, Amy, Jinadasa, Kristhombu Baduge Shameen Nishantha
Format: Article
Language:English
Subjects:
Artificial wetlands
Cities
Climate change
constructed wetland
Effectiveness
Environmental management
Environmental quality
Evaluation
floating wetland
integrated assessment framework
maturation ponds
nature‐based solutions (NbS)
Urbanization
Water pollution
Water quality
Water treatment
Wetlands
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Summary:Water quality is a critical challenge in Asia in the context of growing industrialization, urbanization, and climate change. Nature‐based solutions (NbS) could play an important role in reducing urban water pollution, while generating multiple co‐benefits that could make cities more liveable and resilient. In this regard, a number of pilot and demonstration projects have been set up to explore their potential across cities in Asia. Their effectiveness and impacts, however, have not been adequately documented, thus how they can be sustained, replicated and up‐scaled remain poorly understood. This study aims to contribute to addressing this challenge by co‐developing an integrated assessment framework and employing it to understand how existing evaluations of NbS in the region can be improved. It focuses specifically on a set of nature‐based solutions that have been employed for water treatment across six cities in Southeast Asia (two in each Sri Lanka, the Philippines, and Vietnam), namely, floating wetlands, constructed wetlands and maturation ponds. The study also suggests specific methodologies for capturing a set of core indicators considered relevant for assessing the effectiveness and capturing the multi‐faceted impacts of the examined NbS.
ISSN:1088-1913
1520-6483
DOI:10.1002/tqem.21922