A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China
Typhoon Hagupit was one of six tropical cyclones that affected Hong Kong in 2008. When the typhoon made landfall, the combined effect of the waves, storm surge and seasonal high tides resulted in a maximum sea level of 3.53 m at the nearest tide gauge to the study site, the highest since 1962. The e...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
|
| Online Access: | https://hdl.handle.net/10356/106795 http://hdl.handle.net/10220/16640 http://dx.doi.org/10.1016/j.quaint.2013.04.002 |
| _version_ | 1811690166269509632 |
|---|---|
| author | Lau, An Yi Annie Yeung, Hoi Yan Esther Chik, Shun Wah Chiu, Hon Chim Huang, Zhaoquan Pile, Jeremy Yu, Fengling. Switzer, Adam D. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Lau, An Yi Annie Yeung, Hoi Yan Esther Chik, Shun Wah Chiu, Hon Chim Huang, Zhaoquan Pile, Jeremy Yu, Fengling. Switzer, Adam D. |
| author_sort | Lau, An Yi Annie |
| collection | NTU |
| description | Typhoon Hagupit was one of six tropical cyclones that affected Hong Kong in 2008. When the typhoon made landfall, the combined effect of the waves, storm surge and seasonal high tides resulted in a maximum sea level of 3.53 m at the nearest tide gauge to the study site, the highest since 1962. The event caused considerable damage to coastal infrastructure and large-scale erosion on many sandy beaches in Hong Kong. To study the degree of erosion and recovery of Hong Kong beaches, we surveyed two sandy beaches: Tai Long Wan (TLW), a relatively high-energy exposed beach system, and To Tei Wan (TTW), a relatively low-energy Sheltered beach system. We examined the two beaches for changes in their beach profiles and sediment properties. TLW recovered quickly, with significant post-storm accretion of fine- to medium-grained sand. Within four months after the typhoon, TLW regained >700 m3 sand, forming a new, ∼1.0 m high, berm, with the beach face prograding approximately 5.0 m seaward. In contrast, within the same four months after the typhoon, TTW showed little evidence of sand accretion or recovery, with only minor changes in the beach profile. In fact, instead of post-storm sand accretion, the landward migration of the high tide mark shown in the pre- and post-storm satellite images suggested that the post-storm beach elevation at TTW decreased. The results, which reflect the different background energy regimes of each beach, indicate that different coastal management strategies should be applied. In the case of relatively high-energy beaches of Hong Kong, we suggest not interfering with their natural state. In contrast, in the case of relatively low-energy beaches of Hong Kong, which appear unlikely to recover rapidly from erosion during storms, we suggest further investigation before applying any long- to medium-term management strategies. |
| first_indexed | 2024-10-01T05:59:40Z |
| format | Journal Article |
| id | ntu-10356/106795 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:59:40Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1067952019-12-06T22:18:33Z A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China Lau, An Yi Annie Yeung, Hoi Yan Esther Chik, Shun Wah Chiu, Hon Chim Huang, Zhaoquan Pile, Jeremy Yu, Fengling. Switzer, Adam D. School of Physical and Mathematical Sciences Typhoon Hagupit was one of six tropical cyclones that affected Hong Kong in 2008. When the typhoon made landfall, the combined effect of the waves, storm surge and seasonal high tides resulted in a maximum sea level of 3.53 m at the nearest tide gauge to the study site, the highest since 1962. The event caused considerable damage to coastal infrastructure and large-scale erosion on many sandy beaches in Hong Kong. To study the degree of erosion and recovery of Hong Kong beaches, we surveyed two sandy beaches: Tai Long Wan (TLW), a relatively high-energy exposed beach system, and To Tei Wan (TTW), a relatively low-energy Sheltered beach system. We examined the two beaches for changes in their beach profiles and sediment properties. TLW recovered quickly, with significant post-storm accretion of fine- to medium-grained sand. Within four months after the typhoon, TLW regained >700 m3 sand, forming a new, ∼1.0 m high, berm, with the beach face prograding approximately 5.0 m seaward. In contrast, within the same four months after the typhoon, TTW showed little evidence of sand accretion or recovery, with only minor changes in the beach profile. In fact, instead of post-storm sand accretion, the landward migration of the high tide mark shown in the pre- and post-storm satellite images suggested that the post-storm beach elevation at TTW decreased. The results, which reflect the different background energy regimes of each beach, indicate that different coastal management strategies should be applied. In the case of relatively high-energy beaches of Hong Kong, we suggest not interfering with their natural state. In contrast, in the case of relatively low-energy beaches of Hong Kong, which appear unlikely to recover rapidly from erosion during storms, we suggest further investigation before applying any long- to medium-term management strategies. 2013-10-21T03:35:32Z 2019-12-06T22:18:33Z 2013-10-21T03:35:32Z 2019-12-06T22:18:33Z 2013 2013 Journal Article Yu, F., Switzer, A. D., Lau, A. Y. A., Yeung, H. Y. E., Chik, S. W., Chiu, H. C., et al. (2013). A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China. Quaternary International, 304,163-175. 1040-6182 https://hdl.handle.net/10356/106795 http://hdl.handle.net/10220/16640 http://dx.doi.org/10.1016/j.quaint.2013.04.002 en Quaternary international |
| spellingShingle | Lau, An Yi Annie Yeung, Hoi Yan Esther Chik, Shun Wah Chiu, Hon Chim Huang, Zhaoquan Pile, Jeremy Yu, Fengling. Switzer, Adam D. A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title | A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title_full | A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title_fullStr | A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title_full_unstemmed | A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title_short | A comparison of the post-storm recovery of two sandy beaches on Hong Kong Island, southern China |
| title_sort | comparison of the post storm recovery of two sandy beaches on hong kong island southern china |
| url | https://hdl.handle.net/10356/106795 http://hdl.handle.net/10220/16640 http://dx.doi.org/10.1016/j.quaint.2013.04.002 |
| work_keys_str_mv | AT lauanyiannie acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT yeunghoiyanesther acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT chikshunwah acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT chiuhonchim acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT huangzhaoquan acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT pilejeremy acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT yufengling acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT switzeradamd acomparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT lauanyiannie comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT yeunghoiyanesther comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT chikshunwah comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT chiuhonchim comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT huangzhaoquan comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT pilejeremy comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT yufengling comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina AT switzeradamd comparisonofthepoststormrecoveryoftwosandybeachesonhongkongislandsouthernchina |