Analysis on the Impact of Roof Greenings Water Consumption Made by Meteorological Factor

Roof greening is an effective way to improve the climate of city. However, with the purpose of spreading roof greening, it is necessary to master water consumption and affecting factors. Consequently, people can formulate irrigating system properly and save water. Meteorological factor is one of the important factors that affecting water consumption. Multiple meteorological indicators were changed into a few composite ones by measuring water consumption of roof greening and using Principle Component Analysis. The results of analysis in principal component analysis method show that, comprehensive indicator such as relative humidity, sunshine hours in the factors affect the water consumption was the first principal components, well, rainfall and temperature was the second or the third principal components in different months. Determination of irrigation system for roof greening must be fully based on the meteorological factors. In many meteorological factors, relative humidity, sunshine hours are the comprehensive indicators which should be considered firstly.