A Study Of The High Temperature Distribution And The Heat Island Effect In The Winter Of Wuhan

With rapid development of urbanization, the problems caused by heat-island affection in big cities have become more and more serious and unneglective than ever before. It is necessary and useful for city planner and manager to investigate rapidly and effectively the distribution, intension and effective factors of heat-island in these cities. By means of advanced remote sensing, distribution and change of ground heat field can be monitored synchronously and continuously.In this paper, Wuhan was investigated as a example. A relation model was built between ground temperature and image brightness of LANDSAT7 TM Band 6, and a map of ground heat field was made by IHS enhance method. Results show that the heat field of Wuhan presents regular distribution. The areas from higher temperature to lower temperature are old industrial estates, new industrial estates, old city zone, new city zone and the suburb. It is also found that land cover affects directly the upper ground temperature, so heat-island affection may be weaken through protecting the existing water body and increasing the greenbelt of the city. Then, several factors that affect the heat field of Wuhan are also analyzed.At the same time, the Land Use Cover Condition(LUCC) of Wuhan has been investigated based on the remote sensing image, and is piled up with the ground heat field image made before. Then the relation of the city heat pollution and the LUCC of Wuhan city has been discussed, and several suggestion has been brought forward combined with the construction planning of Wuhan.