利用遥感与GIS分析珠江口番禺段近20a来的沿岸变化

近20a来，珠江口沿岸的变化令人瞩目，以沿岩变化较大的番禺段为例，利用动态获取的遥感信息，经过对遥感图象的分析处理，特别是自动分类中采用了混合训练方法使遥感图象分类精度得到了提高，同时在岸线推移监测中采用了多时相遥感影象融合技术，使岸线变迁一目了然，结合GIS，分析了近20a来（1978-1998年）番禺区的水陆变迁、绿地变化、城镇扩展和围垦发展，说明了了利用先进的遥感和GIS技术可以高效地监测珠江口岸区变化。

ANALYSES ON COASTAL CHANGES OF PANYU SEGMENTOF ZHUJIANG RIVER ESTUARY FOR LAST TWODECADES USING REMOTE SENSING AND GIS

In the last two decades, the Zhujiang River Delta has witnessed a rapid eco-nomic development. The paper demonstrates that remote sensing can be used to monitorthe dynamic changes of coastal areas in the Zhujiang River Estuary, such as coastlinemove and urban expansion of Panyu segment. Remote sensing data from 1978 to 1998are used to reveal the rapid changes that have taken place in the area. The hybrid train-ing approach is proved to be an effective way of improving remote sensing image classifi-cation, so is the multi-temporal compound image technique for the coastline move analy-sis. Geographic Information System is also used to assist planners in the analysis of suchchanges. The impacts of such changes on flooding control and coastal planning are alsodiscussed.