摘要
桂林的城市热岛效应 (简称CHIE ) ,因桂林所处的特殊岩溶地质背景而对城市环境产生特殊的影响。通过对TM遥感影像信息提取 ,清晰揭示出桂林CHIE的分布特征及环境影响区域 ,在此基础上 ,根据岩溶学理论和实测数据 ,从两方面对CHIE对岩溶的影响开展研究 :一方面是CHIE对土层下石灰岩溶蚀的影响 ,另一方面是CHIE对出露石灰岩的影响。研究表明 ,前一种影响可导致溶蚀速度加快 ,后一种影响则以负面影响为主。CHIE与岩溶的长期相互作用 ,导致城区地面热蚀沉降 ,同时会对全球温室效应造成正面影响。
City Heat Island Effect(CHIE) in Guilin exerts special influence to the environment of city because of Guilin located special background of karst geology. The character of distribution and effected areas of CHIE in Guilin are clearly revealed through to extracting the remote sensing information of TM image. On this basis, from the karst theory and the practical date of the earth's surface, to study the effect that CHIE acts on karst for two aspects. One is that CHIE corrodes the limestone under the soil-overburden, and the other is that CHIE acts on the outcropping of limestone on the surface. It makes clear through study, that the first effect can pick up speed for corrosion process, but the second effect is mainly negative action. As a result of interaction between CHIE and karst, it should cause heat-corrosion-earth subsidence, and at the same time make positive effect to hothouse effect of the whole world.
出处
《桂林工学院学报》
2000年第2期192-198,共7页
Journal of Guilin University of Technology
关键词
城市热岛效应
岩溶
热蚀沉降
温室效应
桂林市
city heat island effect
karst
heat-corrosion-earth subsidence
hothouse effect
Guilin
