基于遥感地貌特征的潮流沙脊人工岛围堤选线方法——以辐射沙脊群东沙为例  

Determination of dike line for tidal sand ridge artificial island based on remote sensing of geomorphic features: case study of Dongsha radial sand ridges

作　　者：葛小平[1] 丁贤荣[1] 康彦彦[2] 高恒娟 王鑫浩[1] 

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2015年第6期524-530,共7页Journal of Hohai University(Natural Sciences)

基　　金："十二五"国家科技支撑计划(2012BAB03B01);江苏省自然科学基金(BK2012414);国家海洋公益性行业科研专项(201005006);中央高校基本科研业务费专项(2009B12314;2012B00414)

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。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.

关 键 词：辐射沙脊群 低潮水边线 重现率 二分水 围堤选线 

分 类 号：TV213.1[水利工程—水文学及水资源]