作为中国神圣海疆的三沙，散布着极为宝贵的岛、洲、礁、滩等岛陆空间资源，因其高潮时出露的数量和面积有限，岛礁开发利用受到制约。结合地理环境新变化对岛礁功能重新评估和定位，并以此为牵引推进海洋交通运输条件建设，成为三沙开发和建设的首要任务。文章分析了三沙通航能力的动态变化特性，提出相应对策及建议，为保障三沙海域的航行综合安全提供科学依据。%The precious land resources in Sansha are consisted of islands,sandbanks,and reefs as well.For the small area of land resource,the development of Sansha islands and reefs has been significantly restricted for a long time,especially in the Nansha islands.Recently,a significant in-crease of land resources in Sansha has been presented by island-building in the South China Sea, which greatly improved the geographical condition to construct large port engineering.Thus,it has become a primary task to evaluate the reef function considering the new changes of geograph-ical environment,and to advance marine transportation conditions gradually in Sansha.This paper analyzed the dynamic changes of navigation capabilities in Sansha,such as the development of port system,the utilization of diversified means of transportation,the gradual increase of navigation density.Furthermore,the countermeasures and suggestions were proposed to provide scientific basis for the integrated navigation security in Sansha sea areas.
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