中文摘要：

应用3s技术和海湾涨／落潮不对称原理，研究了最近40年来胶东半岛南部四个典型潮汐汉道海湾的动力地貌演变，分析了大面积修建养殖池对海湾地貌过程的影响。结果表明，最近30年来4个海湾的海岸地貌类型面积、空间分布格局、地貌类型转换、地貌结构和地貌冲淤状态发生了显著改变。在大面积养殖池被围建以前的1960s年代末到1980s年代初，丁字湾处于涨潮不对称状态但不对称程度增高，乳山湾、五垒岛湾和靖海湾也处于涨潮不对称状态但不对称程度在降低。最近30年来的大面积滩涂养殖池修建，使丁字湾由不断增强的涨潮不对称向落潮不对称状态逆转，使五垒岛湾、靖海湾由涨潮不对称向落潮不对称状态的转化提前，使乳山湾由涨潮不对称向落潮不对称状态的转化延缓。

英文摘要：

Based on flood/ebb asymmetry theory and 3S technologies, the morphodynamic evolution during the last 40 years and the impact of mass coastal ponds construction on geomorphic process during the last 30 years of four typical tidal inlet bays in southern Jiaodong Peninsula were studied. Results show that the coastal geomorphic types and the area, distribution, conversion, structure, and erosion/deposition in four bays have significantly changed in the last 30 years. From late 1960s to early 1980s, when large areas of coastal ponds had not been reclaimed, the Dingzi Bay was in flood asymmetry state with its asymmetry ratio increasing, while the Rushan Bay, the Wuleidao Bay, and the Jinghai Bay were also in this state, but their asymmetry ratios were decreasing. However, large-scale coastal pond construction in the last 30 years had caused the Dingzi Bay sudden reverse in ebb asymmetry from rising flood asymmetry state, speeded up the transformation from flood to ebb asymmetry in the Wuleidao Bay and the Jinghai Bay, and delayed the transformation from ebb to flood asymmetry in the Rushan Bay.