论文部分内容阅读
通过对1976～1995年黄河三角洲地区埕岛海域的水深资料以及近年来实测的水深数据的分析,确定了黄河三角洲埕岛地区在1976年黄河改道清水沟后,从三角洲推进淤积期进入了海岸冲刷改造期。按冲刷速率、剖面坡度及其与季节变化的关系可分为快速冲刷阶段(1976～1980)、缓慢冲刷阶段(1981～1992)、以冲刷为主的冲淤调整阶段(1992年至今),海岸边带的后期冲刷改造受季节性影响也比较明显。在深度上基本以15m等深线为界,深水区淤积、浅水区冲刷。通过250m×250m网格化节点的实测水深变化的时间序列,采用二维平面的趋势面拟合方法,可以较好地对本海区的水深进行拟合并做出时间序列值的预测。
Based on the water depth data of Chengdao area in the Yellow River Delta from 1976 to 1995 and the measured water depth data in recent years, it was confirmed that after the Yellow River diverted into Qingshuigou in 1976, Chengdao area in the Yellow River Delta pushed the sedimentation from the delta into the coastal erosion Transformation period. According to the erosion rate, the slope of the section and its relationship with the seasonal variation, the period of rapid erosion (1976-1980), the slow erosion stage (1981-1992), the erosion-adjustment stage (1992-present) Sides of the late redevelopment affected by the season is also more obvious. Depth in the basic 15m isobath depth boundary, deep water siltation, shallow water erosion. Through the time series of measured water depth changes of 250m × 250m gridded nodes, the trend surface fitting method based on two-dimensional plane can be used to fit the water depth of the sea area and predict the time series value.