Abstract: The air temperature (T) and relative humidity (RH) are observed for six different types of rivers and water bodies in Shanghai urban district. By comparing temperature-humidity features and human comfort degrees between the windward and leeward shores of these selected water bodies in different seasons, this paper attempts to analyze microclimate effects of urban river and waterbody effects. The results obtained are as follows: (1) The size of water area contributes greatly to microclimate effects. In observing period for several seasons, the T in the lake leeward decreased by 1～3 ℃ and the RH increased by 6％～14％ compared to that in windward shore in Changfeng Park. (2) Building layout around waterbody affects the microclimate in some degree. Dense high buildings in Zhongyuan residential district transform the state of airflow, so a microclimate effect is formed near Suzhou brook. (3) Compound ecosystem composed by water and greenbelt can do well work for a microclimate effect. On condition of open green space near Zhangjiabang brook, the T in leeward shore is lower by 1.5～2 ℃ and the RH is higher by 4～8％ than that in windward shore during observing periods. (4) The artificial facilities such as fountain, can improve the waterbody microclimate effect. Near artificial lake of Taipingqiao greenbelt, the difference of T and RH enlarged respectively by 0.3 ℃ and 4％ when the fountain was working than it closed in the observing day. (5) The effect of human comfort degree displays more significant in warm spring-summer than it in cold and dry winter.

Key words: temperature, relative humidity, human comfort degree, microclimate effect, urban river and waterbody, temperature, relative humidity, human comfort degree, microclimate effect