基于地貌情势的辐射沙脊群潜在土地资源分析  

Potential land resources analysis of the radial sand ridges based on the geomorphological situation

作　　者：葛小平[1] 丁贤荣[1] 康彦彦[2] 高恒娟 周虹宏[1] 王鑫浩[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593-601,共9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)

摘　　要：针对江苏沿海开发尤其是辐射沙脊群海域潜在土地资源开发、利用和保护问题,本文以维护辐射沙脊群宏观地貌情势为前提基础,以滩涂地形为数据源,采用起围高程为指标,分析了不同开发强度下辐射沙脊群潜在土地资源的数量与分布;以低潮特征的多时相遥感影像为数据源,采用滩涂遥感低潮出露重现率这一稳定性间接特征为指标,重点分析了条子泥、高泥、东沙这三个匡围核心区不同稳定性分级的潜在土地资源质量特征与分布;结合围垦规划需求探讨了条子泥等匡围核心区适宜围垦规模特征.结果表明：（1）根据不同起围高程,辐射沙脊群潜在土地资源数量巨大,可达1552～6827km^2,其中沙洲潜在土地资源面积约为480～4141km^2;（2）根据1973—2011年近40年和2005—2014年近10年低潮特征遥感影像的稳定性特征分析,以理论深度基面0m为界,条子泥、高泥和东沙稳定区优质土地资源面积总量分别为605.65km^2和762.77km^2,稳定等级呈圈层状分布,内部为稳定区,主要分布在沙脊中心滩脊线两侧,其次为基本稳定区,受潮沟活动影响反复冲刷,最外围则为不稳定区,出露较少;（3）条子泥、高泥和东沙三者,最适宜的匡围高程为废黄河口基面0m,局部区域东沙可降低至理论深度基面0m以上,适宜匡围规模为612～712km^2.The development,utilization and protection of the potential land resources of the radial sand ridges are important for the Jiangsu coast.This article based on topographic data of tidal flats,considering geomorphology situation of radial sand ridges,focused on acquiring the amount and distribution of potential land resources under different development intensity with different reclaiming elevation.Using multi-temporal remote sensing images in low tide,stability of potential land resources was analyzed by calculating the outcropping repetition rate of tidal flats.Appropriate scale reclamation and layout of Tiaozini-Gaoni-Dongsha as the main zone of radial sand ridges was illustrated from the land demand and different reclaiming elevation.The results show that：（1）potentially land resources arehuge and the area ranges from 1552 to 6827km^2,including 480 to 4141km^2 on sandbars according to different reclaiming elevations;（2）on the basis of stability analysis during 40years（1973-2011）and 10years（2005-2014）,the areas of Tiaozini and Gaoni above 0meter（Chart Datum）respectively are 605.65km^2 and 762.77km^2（the stable area is distributed on the interior of sand ridges,the secondary stable areas around the key stable area and eroded by repeated tidal creeks,and the peripheral area is instability region which is less exposed）;and（3）the most appropriate elevation interval for reclaimation is between 0mof the Old Yellow River Datum and the 0mof the Chart Datum.In this case,a large space can be conserved for sedimentation promotion.The stable zone above the 0m（the Old Yellow River Datum）should be the priority in the reclamation planning.

关 键 词：地貌情势 辐射沙脊群 潜在土地资源 

分 类 号：P736.12[天文地球—海洋地质]