BEACH SAND-COASTAL DUNES-MODERN VEGETATION-SAND ISLAND GENETIC MODEL OF THE QILIANYU ISLAND

WANG Yuzhe; QIU Longwei; XU Hong; MA Xiao; FU Heping

doi:10.16028/j.1009-2722.2020.208

2021 Vol. 37, No. 6

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Article navigation > Marine Geology Frontiers > 2021 > 37(6): 92-100

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WANG Yuzhe, QIU Longwei, XU Hong, MA Xiao, FU Heping. BEACH SAND-COASTAL DUNES-MODERN VEGETATION-SAND ISLAND GENETIC MODEL OF THE QILIANYU ISLAND[J]. Marine Geology Frontiers, 2021, 37(6): 92-100. doi: 10.16028/j.1009-2722.2020.208

Citation:

WANG Yuzhe, QIU Longwei, XU Hong, MA Xiao, FU Heping. BEACH SAND-COASTAL DUNES-MODERN VEGETATION-SAND ISLAND GENETIC MODEL OF THE QILIANYU ISLAND[J]. Marine Geology Frontiers, 2021, 37(6): 92-100. doi: 10.16028/j.1009-2722.2020.208

BEACH SAND-COASTAL DUNES-MODERN VEGETATION-SAND ISLAND GENETIC MODEL OF THE QILIANYU ISLAND

1.
China University of Petroleum(East China), Qingdao 266580, China
2.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China
3.
First Institute of Oceanology, Ministry of Natural Resources, Qingdao 266061, China

More Information

Corresponding authors: QIU Longwei, qiulwsd@163.com ; XU Hong, qdxhong@163.com

Received Date: 10 December 2020

Publish Date: 28 June 2021

Abstract

Abstract

The beach sand is the material base of a sand island. It is not only the home for sea animals, but also the evidence of the forming process of a sand island. Coastal dunes may act as barriers to protect vegetation from the damage by wave and surge. Both of them have important research significance for protection of a sand island. Based on the field survey on beach sands, coastal dunes and sand islands and vegetation on the Qilianyu Island in the scientific expedition 2019 in addition to the interpretation of satellite remote sensing data, this paper discussed the geological features, morphological characteristics, and geographic positions of the beach sands, coastal dunes and vegetation as well as their relationship to the development of the sand island. It is revealed that the formation of beach-coastal dunes is not only determined by the dynamic actions of waves, tides and storm surges, but also related to the process of sediment transportation and sedimentation. With regard to the formation of sand island, vegetation plays critical roles. It starts from a pattern of spots in the beginning and then gradually expands to the whole supratidal area, and moves from coastal dunes to the center of island, and finally occupies the whole island. In the process, plant colonization plays a key role in sand fixation and sand island formation. Upon the observations mentioned above, a genetic model of beach sand-beach rock-vegetation-sand island in Qilianyu Island is proposed.
- Qilianyu Island /
- grain size analysis /
- beach sand /
- coastal dunes /
- modern vegetation

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References

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