【摘要】 以辐射沙脊群海域离岸沙脊东沙为研究区,探讨在水文、泥沙、地形等基础资料缺乏的条件下,离岸沙脊人工岛式围填选线布局辅助设计方法。采用1973—2014年长时间序列低潮遥感数据,提取沙脊露滩重复率指数指标,实现沙脊稳定性特征的定量计算,并根据指数分布特征及其栅格数量频率分布特征确定最稳定、最适宜的沙脊围堤外廓线选址;采用地貌演变特征线——沙脊二分水和主要子纳潮盆地分水线,实现围填区沙脊二分水主干内廓线和主要子纳潮盆地分水线辅助内廓线设计。更多还原

【Abstract】 Using the Dongsha offshore radial sand ridges as a study area,the layout design for the offshore sand ridge artificial island was studied under the condition of insufficient basic hydrologic,sediment,and terrain data. With longterm remote sensing data under ebb tide conditions from 1973 to 2014,stability analysis of tidal flats was carried out based on the repetition rate of the exposure area,and the most stable and appropriate dike outlines for sand ridge reclamation were identified based on the distribution characteristics of the repetition rate and the spectral distribution of the grid number. According to the characteristic lines of geomorphological evolution,including the water parting line of the sand ridges and that of the main tide intake sub-basin,the internal contours for the water parting lines in the reclamation area and of the main tide intake sub-basin were designed.更多还原