沿海滩涂稳定性的长系列遥感定量分析方法  

An quantitative analysis method for evaluating the morphologic stability of tidal flats by long series of remote sensing images

作　　者：高恒娟 丁贤荣[1] 葛小平[1] 康彦彦[2] 张婷婷[1] 

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

出　　处：《南京大学学报（自然科学版）》2014年第5期585-592,共8页Journal of Nanjing University（Natural Science）

基　　金：国家海洋公益性行业科研专项(201005006);江苏省基础研究计划(自然科学基金)(BK2012414);国家科技支撑计划(2012BAB03B01)

摘　　要：滩涂稳定性尚无规范的分析方法与标准.本研究以江苏岸外辐射沙脊群大面积滩涂为对象,利用近多年低潮滩涂水边线遥感信息和GIS的空间分析功能,采用低潮滩涂的遥感重现率,研究滩涂稳定性的遥感定量分析方法.滩涂低潮遥感重现率与滩涂稳定性的关系是:重现率愈高愈稳定,愈低愈不稳定.根据近40年遥感信息,定量地确定了辐射沙脊群海岸滩涂稳定性系数的时空分布及变化,其中东沙滩涂稳定性最好,高泥次之,条子泥稳定性最差.结合条子泥—高泥—东沙原100万亩围垦规划,评价了这3个匡围区滩涂稳定性,东沙最好,条子泥次之,高泥最差.基于低潮遥感重现率的滩涂稳定性方法可为沿海滩涂研究、开发与保护等提供参考性分析方法.The system of stability of the tidal flats,including standardized analytical methods and standards,has not been built up by now.This paper,uses the radial tidal sand ridges off Jiangsu coast as the study area,and uses the spatial analysis of GIS,the information on low tide waterline from remote sensing images and the occurrence rate of low tide as tools to analyze and make a quantitative classification of stability of tidal flats.The relationship between the occurrence rate of low tide and the stability of the tidal flats is：the higher the occurrence rate is,the more the stability of tidal flats is;the lower the occurrence rate is,the more the instability of tidal flats is.According to the remote sensing information in nearly forty years,the spatial and temporal distribution and changes of the coefficient of the stability of coastal beach have been quantitatively determined.It indicates that the area of Dongsha sandbank has the highest stability,followed by Gaoni sandbank and Tiaozini sandbank.Combining the reclamation planning area of100 million acres of Tiao-Gao-Dong,the stability of the 3areas of inning of tidal flats was evaluated.It indicates that Dongsha planning is the best,followed by Tiaozini planning and Gaoni planning.Based on the low tide occurrencerate,the stability analysis of the tidal flats could be used to provide a reference to the partition layout optimization for the study,the development and the protection of coastal beach.

关 键 词：滩涂稳定性 辐射沙脊群 遥感 低潮水边线 空间分析 重现率 

分 类 号：P642.22[天文地球—工程地质学]