Study On Plant Landscape Of Commercial Pedestrian Street In Chongqing Based On Analysis Of Influencing Factors Of Small Climate

In every big city of China, city commercial pedestrian streets have become the centre of people’s daily life. With continuous improvement of living quality, people urgently need a comfortable outdoor shopping space. The commercial pedestrian street not only provides citizens with shopping places, but also acts as a place for people to relax and enjoy leisure life. All people hope for decent walking street environment whether from the perspective of shoppers or for workers there. To some extent, the walking street is not simply a shopping place for people. It can also be external environmental space for recreation, relaxation, enjoying the cool and landscape like the public park.So far, most commercial pedestrian street of chongqing is a rigid pavement is given priority to, green quantity shortage. In order to study the micro climate characteristics of the commercial pedestrian street in chongqing plant greening, this paper selected the article 5 of the most famous commercial pedestrian street:in chongqing yuzhong district commercial pedestrian street, the pearls of the three gorges square commercial pedestrian street, jiangbei guanyinqiao commercial pedestrian street, yangjiaping middle commercial pedestrian street, nanping commercial pedestrian street in observational studies, this article 5 pedestrian street is the corresponding administrative region economic center, and they all have certain fixed number of year, the plant grew well, wide span the distance between each other. Will select five pedestrian street as the research object for the field microclimate observation, measurement to calculate the amount of green plant at the same time, establish a pedestrian street green plants and the relativity analysis of pedestrian street of average temperature, humidity, it is concluded that reasonable indicator of pedestrian street greening plants in chongqing.According to field survey for many times, the five commercial pedestrian street, respectively chosen plants regularly, medium, small sample area three, each sample region covers an area of 20 m x 20 m, article 5 of pedestrian street, a total of 15 sample region. Hong Kong away in using digital temperature and humidity meter AR867 conditions, separately for each sample region temperature (T) and humidity (H), at the same time observation each sample region near pure hard ground temperature (t) and humidity (h) as the control values, each sample region and its nearby pure hard ground at the same time corresponding to the temperature and humidity is presupposed to cooling effect △T=T-t and humidifying effects △H= H-h; Measurement of every sample region again the amount of green plant (S); Respectively for the amount of cooling effect and the green plant of function image △T/S, humidification effect and the amount of green plant function image △H/S. According to the function image study the correlation between temperature and humidity and amount of green plant, resulting in a certain range, the optimal amount of green plants.Research shows that chongqing city commercial pedestrian street micro climate and plant green quantity has significant correlation, and the closest relationship with the amount of pedestrian street trees green, In the range of 20 m x 20 m, when the green plant has reached 750 m after-900 m after plant cooling effect to reach the best; When the green plant has reached 800 m after plant humidification effect is best. Through calculation, to reach the effect of temperature and humidity are the best, and most economical use of land (more than the best threshold, as the amount of green increased dramatically, plant cooling humidifying effects will only lower intensity increases, so a big increase in the amount of green will only take up more pedestrian street area, and the micro climate do not have too big change), the commercial pedestrian street in chongqing plant 3 d green quantity and pedestrian street area on the numerical ratio should be 2:1.Under the condition of meeting optimal green quantity, making the most of lighting, shadow, ventilation and windproof factor of walking streets will result in prominent effect in improvement of walking streets’ microclimate. Through the case study of Guanyinqiao Pedestrian Street, it fully shows the feasibility of applying plants green quantity to improve walking streets’ microclimate environment, and also proves plants can beautify those streets and even have the reference function for future design and renovation of Chongqing commercial pedestrian streets.