基于地貌情势的辐射沙脊群潜在土地资源分析

发布时间：2019-04-08 19:28

【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1552~6827km2,其中沙洲潜在土地资源面积约为480~4141km2;(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605.65km2和762.77km2,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612~712km2.
[Abstract]:In view of the exploitation, utilization and protection of potential land resources in Jiangsu coastal area, especially in the sea area of radiative sand ridge group, this paper is based on the premise of maintaining the macro-geomorphologic situation of the radiative sand ridge group, taking the tidal flat topography as the data source, and adopting the height of the rise and fall as the index. The quantity and distribution of potential land resources in radiative sand ridges under different development intensities were analyzed. Taking the multi-temporal remote sensing image of low tide characteristics as data source, the stability indirect characteristic of beach remote sensing low tide reappearance rate is used as the index, and the strip mud and high mud are analyzed emphatically. The quality characteristics and distribution of potential land resources in Dongsha, the three core areas with different stability grades; According to the reclamation planning demand, the suitable reclamation scale characteristics of the core area such as sliver mud are discussed. The results show that: (1) according to different height, the potential land resources of the radiative sand ridge group are huge, up to 1552 ~ 6827 km ~ 2, of which the potential land resource area of Sha Chau is about 480 ~ 4141 km ~ (2); (2) based on the stability analysis of remote sensing images of low tide features in the recent 40 years from 1973 to 2011 and the last 10 years from 2005 to 2014, the theoretical depth of 0 m is taken as the boundary, and the sliver mud is defined. The total area of high-quality land resources in high mud and Dongsha stable area is 605.65km2 and 762.77km2 respectively, and the stable grade is in the form of circle layer, the inner part is stable area, mainly distributed on both sides of beach ridge in the center of sand ridge, followed by the basic stable area. Under the influence of tidal trench activity, the most external area is unstable area, and the exposure is less; (3) for strip mud, high mud and Dongsha, the most suitable elevation of Kuangwei is 0m for waste Yellow River estuary, while Dongsha can be reduced to more than 0m for theoretical depth in local area, and the suitable scale of Kuangwei is 612m 712km2.
【作者单位】：河海大学水文水资源学院;河海大学港口海岸与近海工程学院;
【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)
【分类号】：P748

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