关键词: 京杭运河, 植物护坡, 消风减噪, 小气候

Abstract: Effects of five different patterns of vegetative protection of river slopes on wind,noise and micrometeorology along the Huai′an Section of the Grand Canal were studied.Results show that the effects of vegetative protection regulating wind speed,noise level,sunlight intensity,air temperature and relative humidity were quite obvious.Compared with the control of vegetation-free slope,the slope with Phragmites australis had lower wind speed and noise level at the water side and the effects became stronger with the reed community growing wider and denser.The vegetative protection formed of Prunus persica+Phragmites australis was very effective in reducing wind speed,providing shade and increasing humidity,and what’s more,in creating some economic profit,so that,it is a pattern worth further extrapolating along the Grand Canal.The vegetative protection composed of Metasequoia glyptostroboides+Phragmites australis had certain effect of reducing air temperature and increasing humidity,but little of dulling noise or providing shade,so that,it can be used for slopes low in depression,providing people with sightseeing spots in winter.The vegetative protection of Pyrus bretschneideri+Phragmites australis reduced wind speed and noise level significantly,but its effect on micrometeorology was affected by artificial interference.The vegetative protection formed of Cynodon dactylon +Phragmites australis was limited in effect.It is advisable to avoid the use of this pattern as much as possible in designing vegetative protection of river slopes. 

Key words: the Grand Canal, vegetative protection of river slope, effects of reducing wind speed and noise level, micrometeorology