Ecological Benefits

• Haikou Meishe River Fengxiang Wetland Park absorbs 3252 kg of nitrogen (N) and 570 kg of phosphorus (P) annually, with emergent plants demonstrating the most significant removal effects on nitrogen and phosphorus.
• The wetland features a diverse range of plant species, with a Shannon diversity index of 3.232 and a Pielou evenness index of 0.973, indicating rational plant configurations and high species diversity. The wetland provides excellent habitats for birds and fish, enhancing biodiversity.
• The park's landscape adopts green as the main theme, complemented by colorful elements such as red water lilies and yellow papyrus, which enhance its aesthetic value.
• Through ecological design, the wetland park achieves multiple benefits, including water purification, biodiversity conservation, and landscape beautification.

Data Source:

Xie Z, Xiong J, Wu S, et al. Study on the configuration and purification function of wetland plants in Haikou Meishe River Fengxiang Wetland Park [J]. Tropical Forestry,2019,47(02):52-55.

• Research on the pollutant purification effects of the cascade subsurface flow wetlands in Fengxiang Wetland Park shows that the wetland can achieve removal rates of up to 60%-90% for ammonia nitrogen (NH₃-N), total phosphorus (TP), total nitrogen (TN), chemical oxygen demand (COD), and biochemical oxygen demand (BOD). The effluent concentration can meet the Grade A standard of the "Urban Sewage Treatment Plant Pollutant Discharge Standard" and the Class I surface water standard. Among them, the removal rate of ammonia nitrogen can reach up to 90%, the removal rate of total phosphorus is nearly 90% at its highest, and the removal rate of total nitrogen reaches 60%.
• The design parameters of the wetland have a significant impact on the water purification effect. The more complex the shape of the wetland (longer water flow paths, higher perimeter-area ratios), the higher the pollutant removal rate. Vegetation coverage has a positive effect on pollutant removal, with the best effect when the coverage reaches 99%. Suitable plants such as water canna, umbrella papyrus, yellow iris, and paper reed have particularly good effects on the removal of total phosphorus.
• In practice, optimizing the shape of the wetland, increasing water flow paths, and selecting appropriate vegetation types and coverage can achieve efficient water purification, providing a scientific basis for urban landscape design and ecological restoration.

Data Source:

Chang H. Design Parameters of Cascade Subsurface Flow Wetlands and Their Impact on Water Purification Effects - A Case Study of Fengxiang Park in Haikou City [M]. Peking University, 2018.

Social Benefits

• Out of the 232 participants in the questionnaire survey, 39.66% expressed high satisfaction with Fengxiang Wetland Park, and 45.69% expressed satisfaction, with an overall satisfaction rate of 85%, which has increased their frequency of outdoor activities.
• Fengxiang Park Wetland serves as a natural education base for surrounding residents and local students. About 84% of the respondents indicated that the park has increased their ecological knowledge, helped them understand the principles of wetland water purification, and learn the names of plants and their basic characteristics.
• Fengxiang Wetland Park also plays a role in the restoration and representation of the local cultural context and history, reflecting the unique spirit of place, such as the "Qiankun Lake" in Fengxiang Park and the adjacent "Maiying Village".

Data Source:

Li L. Ecosystem Services-Oriented River Ecological Restoration and Its Performance Study - A Case Study of Fengxiang Park Wetland in Meishe River [M]. Peking University, 2020.