渤海西、南岸的海面变化及邻近地区的现代地壳垂直运动

SEA LEVEL CHANGE ALONG THE WESTERN AND SOUTHERN COAST OF BOHAI SEA AND RECENT CRUSTAL VERTICAL MOVEMENT IN ADJACENT AREA

本文利用近几十年的精密水准复测资料和渤海西、南岸的几个验潮站资料,研究了渤海西、南岸及其邻近地区的近代地壳垂直运动和渤海海平面变化趋势,结合本区的构造格架及水系、古海面的分析,认为本区现今的地壳垂直运动仍具有明显的继承性特征;在统一基准下,渤海西、南岸的海面近几十年来基本没有变化,各岸段的海面升降存在差异,但受海面上升的直接威胁不大;渤海沿岸因开采油、气、水造成的广大沉降区,即使在正常海面波动情况下也极易受到损害,并造成环境的恶化,应及早采取相应的对策。

Based on tide data observed at tide stations along western and southern coast of Bohai sea and precise releveling data accumulated in past several decades, the trend of Bohai sea level change and recent crustal vertical movement in adjacent area are studied in this paper. Combining with the structural pattern, the river system and the ancient level in the area, it is pointed out that the recent crustal vertical movement is obviously of inherited characteristics, the sea level shows no significant change in general during recent several decades,but varies in different cosat segements, and there i(?) not direct emergent risk caused by sea level rise. On the other hand a large subsidence region has been formed because of the over withdrawing of underground water, oil and gas. Even if the regular sea level is undulated, the disaster and environmental deterioration can easily be caused. Then the correspondent strategy should be taken as soon as possible.