Abstract:Aquatic plants are an important part of the construction of urban waterscapes. The multi-layered waterscape plant configuration has good low-maintenance characteristics and needs to match the types of aquatic herbs. Taking the Pearl River Delta region as the research area, 32 kinds of aquatic herbs widely used in urban waterscapes are selected. Using the Analytic Hierarchy Process, an evaluation model including three criterion layers of ornamental value, adaptability and growth characteristics and 10 evaluation factors is established to discuss and research on the selection and application of aquatic herbs. The results show that 32 aquatic herbs can be divided into three grades, of which 6 species are grade I, 11 species are grade II, and 15 species are grade III. Ruellia simplex, Cyperus involucratus, Isachne globosa and Acorus calamus are recommended as low-maintenance urban waterscapes plants.