BEACH EROSION AND BEACH NOURISHMENT OF JINMENG BAY BEACH IN QINHUANGDAO

The Jinmeng Bay is a large bathing beach in western Qinhuangdao. The width of the beach was about 40-90 m. It had been under severe erosion before nourishment at an average erosion rate of 1.26-1.98 m/a. The biggest erosion rate might be as high as 3.86 m/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 3 offshore 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.