In LID facilities treating stormwater runoff, various kinds of plants are applied for water circulation recovery and pollutant
reduction. However, rapid changes of soil moisture due to the use of porous media and spread of deicing material during
winter season cause slow plant growth that detrimentally leads to many problems including death of plants. Therefore,
this study was performed to evaluate the salt resistance of plants, its effects on pollutants removal, and water circulation
recovery. Eight different kinds of plants applicable to an LID facility were selected for the experiment, which were Bridal
wreath (Spiraea japonica, S.J), Azalea (Rhododendron indicum, R.I), Dawn Redwood (Metasequoia glyptostroboides,
M.G), Sweet flag (Acorus calamus A.C), Dwarf fan-shape columbine(Aquilegia flabellata, A.F), Pink (Dianthus chinensis,
D.C), Pratia pedunculata (Pratia pedunculata, P.B) and Marigold (Tagetes patula, T.P). Woody plants such as S.P, R.I,
and M.G appear to have less salt resistance compared to the other herbaceous plants. Specifically, M.G achieved the highest
salt resistance among the other woody plants being followed by S.P, and R.I , respectively. For herbaceous plants, T.L and
D.C have the higher salt resistances than that of A.C, P.B, and A.F, respectively. Regardless of the influence of salt to most
of the plants, TN and TP were reduced more than 60% and the study suggests the M.G showed high pollutant removal
efficiency and provided better water circulation by means of active photosynthesis and respiration due to higher growth.