东山湾导流工程可行性研究↑（*）

东山湾西部水域趋向富营养化，水产资源受损。为改变这一状况，对东山湾另开一条沟通外海的水道，兴建导流工程进行了探讨。经潮流场数值模拟与计算，证实打通八尺门后，东山湾西部不域水交换状况可显著改善；通过对几个工程方案的比较分析，确认全部打开八尺门海堤建大桥为最佳方案，实施导流工程不仅利于生态环境和水产业，在海防，旅游，港建等方面也会产生显著的经济和社会效益。

THE FEASIBLE RESEARCH ON DIVERSION ENGINEERING OF DONGSHAN BAY

In recent years,the west water area of Dongshan Bay,the biggest marinenet-box fish-breeding base in P.R.China,bas faced the situation of over-nutrition andits aquatic resources decreasing.In order to change this situation,a feasible plan wasmade with digging a waterway from the bay to the off-shore area.The result of the nu-merical model and calculation of tidal field indicated that the water-change situation abil-ity had been remarkably improved by opening the Bachimen area.By comparison and demenstration of several plans,opening Bachimen Seawall Bridge was considered to be the best one.The construction of diversion engineeing,not only benifits ecological envi-ronment and aquatic resourees,but also can produce remarkable economic and social benifits in many aspects such as coast defence,tourism and port consturction.