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2014•Marine Geology FrontiersRequires access

BEACH EROSION AND BEACH NOURISHMENT OF JINMENG BAY BEACH IN QINHUANGDAO

Liu Xiuji

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Abstract

The Jinmeng Bay is a large bathing beach in western Qinhuangdao.The width of the beach was about 40-90m.It had been under severe erosion before nourishment at an average erosion rate of 1.26-1.98m/a.The biggest erosion rate might be as high as 3.86m/a.The increase in coarse sediments of poor quality had seriously affected the beach tourism.The restoration work included nourishment of 172.5×104 m3 sand in the near shore area and construction of 3offshore submerged-dikes. After more than one year of monitoring after the nourishment,we found that a large amount of filling sand was eroded immediately after the beach nourishment.Then the beach erosion was reducing and gradually the beach reached a status of balance.After fifteen months,there remained 83.4% of the nourished sand.It is regarded as a successful case of beach nourishment.

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What this paper is about

The Jinmeng Bay is a large bathing beach in western Qinhuangdao.The width of the beach was about 40-90m.It had been under severe erosion before nourishment at an average erosion rate of 1.26-1.98m/a.The biggest erosion rate might be as high as 3.86m/a.The increase in coarse sediments of poor quality had seriously affected the beach tourism.The restoration work included nourishment of 172.5×104 m3 sand in the near shore area and construction of 3offshore submerged-dikes. After more than one year of monitoring after the nourishment,we found that a large amount of filling sand was eroded immediately after the beach nourishment.Then the beach erosion was reducing and gradually the beach reached a status of balance.After fifteen months,there remained 83.4% of the nourished sand.It is regarded as a successful case of beach nourishment.

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Available abstract

The Jinmeng Bay is a large bathing beach in western Qinhuangdao.The width of the beach was about 40-90m.It had been under severe erosion before nourishment at an average erosion rate of 1.26-1.98m/a.The biggest erosion rate might be as high as 3.86m/a.The increase in coarse sediments of poor quality had seriously affected the beach tourism.The restoration work included nourishment of 172.5×104 m3 sand in the near shore area and construction of 3offshore submerged-dikes. After more than one year of monitoring after the nourishment,we found that a large amount of filling sand was eroded immediately after the beach nourishment.Then the beach erosion was reducing and gradually the beach reached a status of balance.After fifteen months,there remained 83.4% of the nourished sand.It is regarded as a successful case of beach nourishment.

Key concepts: Beach nourishment, Coastal erosion, Plage, Geology, Erosion, Dike, Shore, Bay

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