辽河三角洲湿地的景观变化分析

ANALYSIS OF WETLAND LANDSCAPE CHANGES IN LIAOHE DELTA

利用遥感、ＧＩＳ手段对辽河三角洲１９８６年和１９９４年两个时段的湿地景观进行研究，认为本区景观变化是由两种作用力相互作用而形成的，从而形成了本区独具特色的景观变化方式，即半自然湿地（以苇田为主）向人工湿地（以稻田为主）转化，自然湿地（主要是滩涂景观）向半自然及人工湿地转化的特征。

Landscape change is the process of landscape transformation from one phase to another, as a reault of interactions between the inner contradictions and outer factors. Using technology of remote sensing and GIS, the paper analyzed two maps of wetland types of Liaohe delta in different periods to study the changes of wetland landscape in time and space. We found that the change of the components of the studied area is not very evident, the artificial wetlands, semi natural wetlands and natural wetlands are still the main components of the area which is more than 90% of the total area. The changing tendency of wetlands is from the land to the sea. The semi natural wetlands are diminishing in recent years, and the artificial wetlands and natural wetlands are increasing comparatively. There are two main factors determining the landscape changes, which are the nature evolution itself and the human disturbances.