| 摘 要： | Study results on changes of rivers, lakes and coastlines have great significance for water resource exploitation, land use planning, industry, and agriculture.Recognition of traces of changed water areas can be done more quickly and correctly by processing multi-time and multi-type remote sensing data and image matching and enhancement with computer and optical equipments than by using conventional methods.Features of water area changes in ancient times can be recoverd by comparing Landsat data and air-photos with historical records.Remote sensing technique is very efficient for monitoring short-term quantitative changes of water areas.Systematic analysis of the remote sensing data of this region shows that river changes have become less frequent, that the area of lakes has decreased year by year, and that the coast line at the river mouth has continually moved seaward. Huanghe river activity caused changes of water areas here in ancient times. But human activities have been playing an increasingly impo
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