英译汉 各位老大帮下Another study on UHI by means of field measurement
英译汉 各位老大帮下
Another study on UHI by means of field measurement and GIS has also been done in Vancouver,Canada (Ao & Ngo,2000).Its objective is to identify the relationship between design characteristics of urban land use and surface thermal emissions within the City of Vancouver.The analysis seeks to quantify the influence of land use characteristics such as impervious surfaces,vegetation,density of the built environment,and street geometry on the release of thermal energy.The study identified that areas with high density,like the downtown core,have highest temperature which is related to the thermal properties of the existing structures and the street geometry.The relatively coolest intersection in the city was found to be closest to vegetation.
In Japan,Kinya and Koumura (2003) was using ADS40 image and GIS to analyse the greenery effect in Tokyo.The green places from ADS40 image was extracted to get the current greenery distribution and GIS played as analysis tool to find the size of potential space to increase green.Then the extracted data was superimposed on building data using the GIS software ArcView3 in order to get rooftop greening areas.
Objectives
In Singapore,with the projection of 5.5 million people in the next 40–50 years (URA,2001),the demand for housing and infrastructure is also increasing.It leads to the changing of land use type from green to hard surface building blocks or industries.Previous research on the UHI of Singapore (Wong,2004) has not
discussed yet which land use type has more obvious influence on the temperature build up and its possible cause.
This study has the following objectives:
(a) to investigate the influence of various land use types on the urban heat island;
(b) to identify land use types which have obvious impact on the urban temperature;
(c) to study the temperature distribution across the different land use types.