A CONSTRUCTION OF NATURE-BASED SOLUTION FOR WETLAND PURIFICATION WITH ANALYTIC HIERARCHY PROCESS AND FUZZY SET QUALITATIVE COMPARATIVE ANALYSIS

Wetland parks have been widely studied for their roles in purifying water and enhancing ecological sustainability.This study proposes a methodology from a natural and social perspective for testing water purification effects through a case study in the Daqitou wetland in Foshan, China.Innovatively, it assessed the wetland's efficiency in removing contaminants such as nitrogen and phosphorus, and in changing pH, using plants and animal experiment, expert evaluation, and fuzzy set qualitative comparative analysis (FsQCA).The results demonstrated a significant reduction in pollutants in water through the combination of flora and fauna: Hygrophila salicifolia, Vallisneria natans, Bischofia javanica, Cipangopaludina cathayensis and Macropodus opercularis.The findings highlight the importance of integrating wetland communities into urban planning as a nature-based solution for future environmental management.