近130年胶州湾自然形态和冲淤演变探讨

An Exploration on the Natural Morphology and the Siltation and Erosion Development of the Jiaozhou Bay in Recent 130 Years

以胶州湾不同时代的海图为依据 ,采用人机交互方式 ,利用数字化板和地学软件 ,对胶州湾海底冲淤态势进行了半定量 (精确到量级 )分析 ,划分了湾内淤积区、侵蚀区 ,并给出了历史变迁趋势。结果表明 ,2 0世纪 80年代以前 ,胶州湾基本处于淤积缩小状态 ,沧口水道和环流中心的海湾中部及沿岸各小湾为淤积区 ,湾口部分和外湾侵蚀 ;2 0世纪 80年代末 90年代初 ,胶州湾反向发展 ,转为侵蚀 ,侵蚀区从湾口向内湾经各水道辐射分布 。

Based on the bathymetric charts for the Jiaozhou Bay in different periods, the quasi quantitative analyses of the Jiaozhou Bay siltation and erosion situations were made by using digitizer and geo software to determine the siltation and erosion areas in the bay and to give the historic development trends. It is shown from the analysis results that the Jiaozhou Bay before the 1980s was basically in a siltation and shrink situation with the Cangkou channel, the central bay area and the inlets along the coastline being siltation areas and the bay mouth and outer bay being erosion areas; but the Jiaozhou Bay from the late 1980s to the early 1990s was in an erosion situation with radial erosion areas from the bay mouth to the inner bay and small siltation patches between the erosion areas.