关键词: 莱州湾东岸, 陆海相互作用, 海岸缓冲区

Abstract: The research on the LOICZ and the buffer area in the eastern coast,Laizhou Bay,three points were obtained.1 Buffer area of coastal zone The main idea of buffer area layout is to actualize effective projecting and controlling in the region of acute LOICZ,in order to harmonize the relations among population,resources and environment.The possibilities and feasibilities of coast zone programme are summed up in the following: ①The multi-environment in the Holocene（such as lagoon,billabong etc.） is the base of the coastal zone system stability. ② Sea water intrusion,coastal zone erosion and land degradation occurrence since the 1960s need to be prevented and controlled.③ The start of the Chinese Nature Foundation Item,"coastal zone eco-recovery research",marks the initiation of eco-recovery and rehabilitation.④ The intense LOICZ,concentrating in coastal zone,forms the core of buffer area which should be the focus of study and planning.2 The frames and functions of coastal zone There are archaic lagoons sandy coast,sandy coast of gentle deposits,artificial coast and estuarine coast which are generalized into three basic types: confined type of geomorphology in archaic lagoons,opened type and artificial coastal type.The opened type includes estuarine coast and deposit coast.The cross section of the coast is divided into three buffer belts.The belt Ⅰ lies between the low tidal line where only the greatest tide could arrive.Its function is to prevent the marine hydraulic action.The belt Ⅱ is from high tidal line to the farthest land affected most seriously by tide-storm in the history.This belt could mitigate the destruction caused by tide-storm and flood.And the belt Ⅲ extends to the distributing parts of the alluvium and diluvium of the mid Holocene and was mainly affected by hails,so relevant measures should be taken to reduce the loss of hail disaster.3 The boundary and dynamic process of buffer area It is the most important modality which interacts between fresh water and sea water.As a matter of fact,the transitional zone between fresh water and sea water was very wide in Chinese coast.Within the transitional zone,the main cations-exchange among water and rock occurred between Na⁺ and Ca²⁺,but K⁺is strongly adsorbed in mixed water.From coast into land,the Na⁺ and Mg²⁺were reducing and the Ca²⁺ was enriching and reached its extreme by the margin of the transition zone.The extent of the transition zone varied from 2 km to 4 km in Laizhou area,from 1.5 km to 3.5 km in Longkou area and from 1.5 km to 6.0 km as a whole.

Key words: eastern coast of Laizhou Bay, land and ocean interaction of coastal zone(LOICZ), buffer area of coastal zone