Dr Edward Park (PhD. University of Texas at Austin, USA) is an Assistant Professor in Physical Geography at the National Institute of Education (NIE), Asian School of the Environment (ASE), and the Earth Observatory of Singapore (EOS), Nanyang Technological University (NTU). He is developing a river research program titled Tropical Rivers in the Anthropocene in EOS, which aims to understand how rivers in the tropics respond to different natural disasters and human impacts. With his research focused largely on large rivers in Southeast Asia, Edward is leading multiple projects in the Mekong Basin. He has published several high-impact research articles in top journals including Nature, Remote Sensing of Environment and Science of the Total Environment. He is currently the national representative for the International Association for Geomorphologists (IAG) and is an executive committee member of the Association of Singapore Teachers (AST). He is also an editorial board member of Science of the Total Environment and Journal of Environmental Management. Dr Ho Huu Loc (PhD. Kyoto University, Japan) is an Assistant Professor of Water Engineering and Management at the Asian Institute of Technology (AIT). Before joining the institute, he was a Research Fellow at the Nanyang Environment and Water Research Institute (NEWRI) and the National Institute of Education (NIE) of Nanyang Technological University, Singapore. His professional experience in teaching, research, and consultancy span over the last 10 years in Asia, across the fields of Catchment Hydrology, Climate Change, and Nature-based Solutions. He has co-authored more than 60 journal articles in high-impact factor international journals, with a current h-index of 21 and a total citation count of more than 1,345 (Google Scholar). Dr Ho is also serving as an editorial board of three Scopus-indexed journals, including Conservation, Journal of Water Management Modelling, and Evaluation Review. He has also served as a guest editor for Water, Sustainability, and Land. Dr Dung Duc Tran (PhD. Wageningen University, Netherlands) is a Research Fellow of Hydrology and Water Resources Management at the National Institute of Education (NIE) and is a member of the Tropical Rivers Group at Earth Observatory of Singapore (EOS), Nanyang Technological University (NTU), Singapore. He was the vice director of the Centre of Water Management and Climate Change (WACC) at Vietnam National University in Ho Chi Minh City (VNU-HCMC). His professional experience involves solving problems in hydrological and hydraulic modelling, improving irrigation systems' efficiency, implementing environmental impact assessment tools, and investigating integrated water management related to policy in agriculture and ecology. He has participated in and led more than 50 projects within the Southeast Region and Mekong Delta of Vietnam. More than 40 of his projected-based studies have been published in high-impacted peer-reviewed journals, such as Hydrology and Earth System Sciences, Journal of Hydrology, Agricultural Water Management Journal, Journal of Environmental Management, and Science of the Total Environment.

• Section I: Introduction1. Mekong Delta in Globally Changing Environment2. Unsolved Environmental Issues: New Evidence and Future OutlooksSection II: Unsolved Environmental Issues at the regional and delta scales3. Climate Change in the New Era of the Mekong Delta: Environmental Challenges, Opportunities, and Mitigation and Adaptation Management Strategies4. Climate Change Impacts on the Mekong Delta Hydrology: Hydrological Alterations or New Hydrology?5. Hydropower Plan Development Upstream the Mekong Region: Energy Transition, Tradeoffs and Renewable Alternatives to minimize Environmental Pressures Downstream6. Water Infrastructure Development or Enhancement of Retention Capacity for Mekong Delta Floodplains: Floodwater Management under Environmental Changes7. Sinking Mekong Delta Among Deltas in the Anthropocene: What We Know and What We Don’t8. River Bank Erosion Induced Human Displacement across Mekong Delta and Its Consequences on Livelihood Sustainability9. Salinity Intrusion in Mekong Delta at the Crossroad: Concrete Protections or Nature-based Solutions with Adaptation Pathways10. Aquatic ecosystem service across the Vietnamese Mekong Delta: How fish farmers have coped with climate change and environmental pressuresSection III: Case studies for Environmental Issues11. Stakeholders’ Perception on Floodwater Management Strategies for Long Xuyen Quadrangle and Plain of Reeds Floodplains: History, Present, and Future Outlook12. Innovative Agriculture and Technologies for Environment Protection from Water Pollution in An Giang and Dong Thap Provinces13. Urban Floods Issues driven Socio-hydrology Complexity in Can Tho City under Climate Change and Environmental Impacts14. Sand-mining Activities in the Mekong and Perception of Inhabitants from Sustainable Assessments15. Smart aquaculture in Circular Economy to Reduce Water Pollution from Sea Level Rise induced Salinity Intrusion in Tra Vinh and Soc Trang Provinces16. Adaptation Measures for Land Subsidence Problems driven by Groundwater Extraction in Ca Mau of the Mekong Delta17. Climate-Smart Agriculture under Drought and Salinity Intrusion Impacts: Case studies in Ben Tre and Ca Mau Provinces18. Safeguarding the Mekong Delta’s Food Security with Nature-based Solutions