【摘要】 盖州滩是典型的潮流浅滩,其发育受双台子河的制约。1958年双台子河建闸后,入海径流量逐年减小,洪水期的冲刷作用减弱,潮流作用趋于占主导地位。潮流将大辽河、大凌河、小凌河等河流入海泥沙向双台子河口区搬运,由于涨潮流速大于落潮流速,盖州滩不断淤积。1999年双台子河截流,纳潮量进一步减小和无洪水期的冲刷作用,随潮流进入双台子河口区的泥沙大部分沉积下来,淤积具有加快的趋势,海洋动力塑造了今日盖州滩。更多还原

【Abstract】 The Gaizhou Beach is a typical tide shoal and its development is restricted by the Shuangtaizi River.After the Shuangtaizi River brake was constructed in 1958,the runoff entering the sea has decreased year by year,the scouring process occurring during the floods has been weakened,and the tidal process tends to dominate.The sediments derived from the Daliao River,the Daling River and the Xiaoling River are transported into the Shuangtaizi estuary by the tidal current.Because the flood tidal current has a higher speed than the ebb current,the Gaizhou Beach is silted-up continuously.The sediments brought by the tidal current are mostly deposited in the Shuangtaizi estuary due to the stopflow of the river,the further decrease of tidal prism and the absence of scouring process occurring during the floods,making the siltation speed up.It is the marine dynamics that has shaped the present-day Gaizhou Beach.更多还原