近100a来浙江大陆海岸线时空变化特征

发布时间：2018-03-10 06:05

本文选题：浙江　切入点：大陆海岸线　出处：《海洋学研究》2016年03期 　论文类型：期刊论文

【摘要】：收集7个时期的历史图件或卫星遥感影像,运用RS和GIS技术,进行信息提取和实测岸线数据验证,获取各时期浙江大陆海岸线矢量,统计分析结果显示:(1)浙江大陆海岸线总体上表现为海岸线位置外推加快,平直的人工岸线不断取代曲折的自然岸线,部分近岸岛屿并入大陆,海岸线长度明显缩短,百年来人工岸线所占比例由48.01%上升至67.46%。(2)人工岸线和围垦面积变化规律总体呈现出3个明显阶段:1913—1970年自耕农时代高滩围垦阶段,人工岸线长度增加288.78km,围垦面积仅增593.35km2;1970—1995年集体农业时代联围堵港阶段,围垦面积快速增加,人工岸线长度反而减少;1995—2014年工业与城镇化建设围垦阶段,人工岸线长度增加116.66km,而围垦面积剧增1 053.00km2。(3)河口区大陆海岸线全线平移外推,海岸线长度则有增有减,1913年以来浙江主要河口区围填海面积达1 914.85km2,占全省围填海面积的76.79%。(4)海湾区大陆海岸线变化以截弯取直为特点,岸线总长度持续减少,百年来三大港湾围填海面积达429.32km2,占全省的17.22%。
[Abstract]:Collecting historical maps or satellite remote sensing images of seven periods, using RS and GIS techniques, extracting information and verifying the measured shoreline data, obtaining the coastline vector of Zhejiang mainland in each period. The results of statistical analysis show that the shoreline of Zhejiang mainland generally shows that the shoreline position is extrapolated faster, the straight artificial shoreline continuously replaces the tortuous natural shoreline, some of the inshore islands are incorporated into the mainland, and the length of the shoreline is obviously shortened. The proportion of artificial shoreline increased from 48.01% to 67.46.Qun (2) the change of artificial shoreline and reclamation area showed three distinct stages: 1913-1970, the stage of high beach reclamation in the age of peasant farmers, the proportion of artificial shoreline was increased from 48.01% to 67.460.The change law of artificial shoreline and reclamation area showed three distinct stages. The length of artificial shoreline increased by 288.78km, the reclamation area increased only by 593.35km2 (1970-1995), the reclamation area increased rapidly, and the length of artificial shoreline decreased during the period of industrial and urbanization construction reclamation in 1995-2014. The length of artificial shoreline increased by 116.66km, while the reclamation area increased sharply by 1053.00km2. The length of the coastline has increased and decreased. Since 1913, the reclaimed area of the main river estuary in Zhejiang Province has reached 1 914.85 km ~ 2, accounting for 76.79.9 km2 of the total reclaimed area of the whole province.) the coastline changes in the gulf area are characterized by truncation and straightness, and the total length of the shoreline continues to decrease. In the past 100 years, the reclamation area of the three major harbors has reached 429.32 km2, accounting for 17.22% of the whole province.
【作者单位】：国家海洋局第二海洋研究所;
【基金】：国家自然科学基金项目资助(41576095) 浙江省“908”专项海岸带调查项目资助(ZJ908-01-03)
【分类号】：P737.1;P715.7

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