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Copyright of Advances in Water Science / Shuikexue Jinzhan is the property of Editorial Board of Advances in Water Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Artificial avulsion of the Yellow River estuary should be carried out when natural avulsion location had been moved gradually upstream to the high tide line, for better use of sediment storing capacity of the ambient waters and for meeting major social and economic demands. Two huge-scale natural avulsion occurred in 2004 and 2007 in the Qing8 Course, with the avulsion locations moving upstream 2. 5 km, reaching the high tide line and shifting lower course by as long as 7.2 km, which indicated the current Course had evolved to the last stage. The current course would severely reduce the sediment-storing capacity of the ambient sea area at Gudong sea dike when the avulsion standard was met if the course was kept running the way as it docs now. The water depth at the Gudong sea dike had been increase to as deep as 5 m and would continue due to waves and current. It is supposed that an investigation about early man-made changing to Beichahe Course should be done in the years to come to shorten the river increase, make hill use of sea dynamics and sediment storing capacity, slow down the erosion near the Gudong sea dike and suppm1 local oil exploitation. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ｔｈｅ ｐａｐｅｒ ｉｓ ｉｎｔｅｎｄｅｄ ｔｏ ｓｈｏｗ ａ ｎｅｗ ｍｅｔｈｏｄ ａｂｏｕｔ ｈｏｗ ｔｏ ｒｅｄｕｃｅ ｅｒｒｏｒｓ ｉｎ ｅｌｅｖａｔｉｏｎ ｖａｌｕｅｓ ｏｆ ｔｈｅ Ｙｅｌｌｏｗ Ｒｉｖｅｒ ｄｅｌｔａｉｃ ｓｅａ ｂｅｄ， ｕｓｉｎｇ ｔｈｅ ｔｉｄａｌ ｌｅｖｅｌｓ ｏｂｔａｉｎｅｄ ｆｒｏｍ ｔｈｅ ｎｕｍｅｒｉｃａｌ ｍｏｄｅｌｌｉｎｇ ｏｆ ｔｈｅ ｔｉｄｅｓ ｉｎ ｔｈｅ Ｂｏｈａｉ Ｓｅａ ｗｉｔｈ ｄｅｔａｉｌｅｄ ｂａｔｈｙｍｅｔｒｉｃ ｄａｔａ ｓｕｒｖｅｙｅｄ ｉｎ ２０１５ ｆｏｒ ｔｈｅ ｍｏｄｅｌｉｎｇ． Ｉｔ ｉｓ ｆｏｕｎｄ ｔｈａｔ ｔｈｅ ｃｏｎｖｅｎｔｉｏｎａｌ ｂａｔｈｙｍｅｔｒｉｃ ｓｕｒｖｅｙ ｍｅｔｈｏｄ ｍｉｇｈｔ ｌｅａｄ ｔｏ ｔｈｅ ｍａｘｉｍｕｍ ｅｒｒｏｒ ｏｆ １．３ ｍ ｔｏ ｔｈｅ ｓｅａ ｂｅｄ ｅｌｅｖａｔｉｏｎ ｖａｌｕｅｓ． Ｔｈｅ ｓｐａｔｉａｌ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｔｈｅ ｅｒｒｏｒｓ ａｒｅ ｆｏｕｎｄ ｔｏ ｂｅ ｏｆ ｔｗｏ ｔｙｐｅｓ， ｓｕｂｊｅｃｔ ｔｏ ｓｉｚｅｓ ｏｆ ｌｏｃａｌ ｔｉｄａｌ ｆｌａｔｓ ｗｈｅｒｅ ｔｈｅ ｔｉｄａｌ ｌｅｖｅｌｓ ａｒｅ ｍｅａｓｕｒｅｄ ｆｏｒ ｃｏｍｐｉｌｉｎｇ ｔｈｅ ｂｅｄ ｅｌｅｖａｔｉｏｎｓ． Ｔｈｅ ｏｐｔｉｍｕｍ ｔｉｍｉｎｇｓ ｆｏｒ ｔｈｅ ｂａｔｈｙｍｅｔｒｉｃ ｓｕｒｖｅｙ ａｒｅ ｄｅｔｅｒｍｉｎｅｄ， ｗｈｉｃｈ ｓｈｏｗｓ ｔｈｅｒｅ ｉｓ ２５％－５０％， ｔｏｔａｌｌｙ ｉｎ ｔｉｍｅ， ｏｆ ａ ｔｙｐｉｃａｌ ｔｉｄａｌ ｐｅｒｉｏｄ ｏｆ ａｂｏｕｔ ２４ ｈｏｕｒｓ ａｎｄ ５０ ｍｉｎｕｔｅｓ ａｖａｉｌａｂｌｅ ｔｏ ｃｏｍｐｌｅｔｅ ｔｈｅ ｓｕｒｖｅｙ， ｗｉｔｈ ｔｈｅ ｅｒｒｏｒｓ ｔｏ ｔｈｅ ｃｏｍｐｉｌｅｄ ｓｅａ ｂｅｄ ｅｌｅｖａｔｉｏｎｓ ｓｉｇｎｉｆｉｃａｎｔｌｙ ｒｅｄｕｃｅｄ ｔｏ ｔｈｅ ｌｏｗ ｒａｎｇｅｓ ｂｅｔｗｅｅｎ ０．０４ ｍ ａｎｄ ０．１２ ｍ． [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)