Establishment and implementation of green infrastructure practice for healthy watershed management: Challenges and perspectives

The water management in various countries of the world provides a comprehensive understanding of the international movement on healthy watershed management. Watershed characteristics including River basin management in the UK, eco-health watershed management in Canada, sustainable water management in Korea, integrated watershed management in Japan, and healthy watershed management in the US have been examined in this review. Pioneering countries utilize green infrastructural applications to improve their resilience against climate change by adopting adaptive solutions and mitigating pollution sources. This paper includes an overview of the implementation of green infrastructure exemplified by bioretention in urban development and ecosystem maintenance. The good engineering practice for bioretention was established by applying data collected from other research. Biomantle and semi-direct injection of storm water are the two methods for sustaining bioretention functionalities for peak flow reduction and soil stability enhancement. Maximum pollutants reduction efficiencies by bioretention were reported in the past research, including 99% of phosphorus, 82% of nitrate, 92% of heavy metals, and 96% of suspended solid. Lastly, a conclusive benefit analysis of green infrastructure from environmental, economic, and social perspectives was conducted.