摘要
根据黄河三角洲2003-2020年卫星遥感影像,推算影像成像时潮位数据,筛选高潮和低潮两组影像,解译两组影像瞬时水边界;分析黄河三角洲整体和局部变化、新生沙洲以及入海口位置、方向的变化范围;提出海岸带变化表征指标,用以表征黄河三角洲海岸带形态变化特征。结果表明:2003年以来,黄河三角洲海岸带一直处于淤积与侵蚀并存的状态,高潮时,淤积总面积66.39 km^(2),侵蚀总面积64.46 km^(2),8条断面中有5条断面呈淤积趋势,最大淤积距离10.30 km, 3条断面呈侵蚀趋势,最大侵蚀距离4.51 km;低潮时,淤积总面积90.36 km^(2),侵蚀总面积33.50 km^(2),5条断面呈淤积趋势,最大淤积距离9.62 km, 3条断面呈侵蚀趋势,最大侵蚀距离3.91 km;2013年入海口处出现小规模沙洲,2020年沙洲最大面积达19.57 km^(2);2007年入海口改道北向,2020年入海方向最大方位角为336°,入海口最大向西北偏移12.3 km。
According to the satellite remote sensing images of the Yellow River Delta from 2003 to 2020, it calculated the tide level data atthe time of imaging, screened the two sets of high tide and low tide images and interpreted the instantaneous water boundaries of the two setsof images. It analyzed the overall and local changes in the Yellow River Delta, new sandbanks, the variation range of location and direction ofthe estuary. It put forward the characterization index of coastal zone change, which was used to characterize the morphological change charac⁃teristics of the Yellow River Delta coastal zone. The results show that since 2003, the Yellow River Delta coastal zone has been in a state ofcoexistence of siltation and erosion. At high tide, the total area of siltation is 66.39 km2 and the total area of erosion is 64.46 km2. Among the8 sections, 5 sections show a siltation trend, with the largest silting. At a distance of 10.30 km, 3 sections show a tendency of erosion, withthe maximum erosion distance of 4.51 km;at low tide, the total siltation area is 90.36 km2, and the total erosion area is 33.50 km2. 5 sec⁃tions show a siltation trend, the maximum siltation distance is 9.62 km, and 3 sections are eroded trend, the maximum erosion distance is3.91 km;in 2013, a small⁃scale sandbar appears at the estuary, till 2020, the largest area of the sandbar reaches to 19.57 km2. In 2007,the estuary is rerouted to the north, till 2020, the maximum azimuth angle of the estuary is 336°. The maximum offset of the estuary to thenorthwest is 12.3 km.
作者
单春芝
来庆广
刘焱春
石锦坤
SHAN Chunzhi;LAI Qingguang;LIU Yanchun;SHI jinkun(Qingdao Geo-Engineering Survey Institute(Qingdao Geological Survey and Development Bureau),Qingdao 370200,China;Key Laboratory of Geological Safety of Coastal Urban Underground Space,MNR,Qingdao 370200,China)
出处
《人民黄河》
CAS
北大核心
2023年第1期69-75,共7页
Yellow River
基金
山东省地质矿产勘查开发局地质勘查与科技创新项目(202022)。
关键词
海岸带
形态变化
瞬时水边界
遥感
黄河三角洲-
coastal shape
coastal change
water boundary
deltaremote sensing
Yellow River delta