A Review of Researches on Plant Configuration and Decontamination Efficiency of Rain Gardens in China

Abstract

Abstract Rain garden is a low-impact development method that uses topographic design to store and purify rainwater, and then adjust rainwater to reuse rainwater. The plants in the rain garden are the key components of its function of storing and purifying rainwater. This article refers to the CNKI database literature about the selection and planting effects of rainwater garden plants as of October 2019. Using literature measurement analysis and content analysis methods, we found that: 1) The research on rainwater garden plants has been increasing and deepening, involving various disciplines; 2) Research on the configuration of rainwater garden plants has gradually shifted from qualitative research to quantitative research; 3) The types of rainwater garden plants that can be selected are diverse, and scientific configuration methods can improve efficiency; 4) Most research literature on plant purification in the aquatic or wet plants on the removal and purification of nitrogen, phosphorus, heavy metals and other pollutants and other aspects. Finally, it discusses the deficiencies of the rainwater garden plant research, and looks forward to its future research direction, aiming to provide reference for the rainwater garden plant selection and rainwater garden scientific construction in China.