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以 18 5 5、195 4、1976年和 1992年的高潮线对比分析黄河三角洲海岸线的整体变化情况 ,表明在行河岸段 ,海岸线迅速向前淤进 ,而在非行河岸段 ,由于风浪、海流等侵袭 ,岸线后退。采用 1976、1982、1987、1990年和1995年近海区实测水深资料 ,以 - 2 m等深线的变化来研究清水沟流路河口三角洲岸线的动态变化过程 ,发现河口造陆速度逐渐变慢 ,反映出河口尾闾从初期发育走向萎缩的趋势。岸线变化的环境地质效应表现在多方面 ,对下游河道冲淤影响最重要的是河床主槽持续淤积及同流量水位的抬升所带来的防洪风险的增大。
The analysis of the overall changes of the coastline of the Yellow River Delta by comparing the climax lines of 1855, 1954, 1976 and 1992 shows that the shoreline and the coastline are rapidly silted in the bank, while in the non-bank section, Invasion, shoreline back. Based on the measured water depth data of 1976, 1982, 1987, 1990 and 1995, the dynamic change process of Qingshuigou estuarine delta coastline was studied with the change of -2 m isobath depth, and it was found that the land reclamation speed gradually slowed down , Reflecting the trend of the estuary tail from the initial development to shrinking. The environmental and geological effects of shoreline changes are manifested in many aspects. The most important impact on the erosion and deposition of the downstream channels is the increased flood risk due to the continuous siltation of the main channel and the rise of the same flow level.