HEBE JEBES
NOV/DEC 2021
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FEATURES
THE TIDES 潮汐更迭 THEY ARE A CHANGIN’ What happened to the Waglan tide gauge? 横瀾島潮汐站現況如何？
It may not have escaped your notice, but the Waglan Island tide gauge on the Hong Kong Observatory's (HKO) weather page has been “under maintenance” for the last three years. So I decided to contact the HKO to find out what the problem was and how long it usually takes to repair a tide gauge. Fortunately, their reply was a lot swifter than the repair.
By Paul Arkwright
根據香港天文台天網頁上的資訊，橫瀾島潮汐站在過去三年一直處於維修階段，所以我決定聯 繫香港天文台，想知道原因為何，以及是次維修工程需時多久。慶幸的是，他們給予回覆的速 度比維修要快得多。 該潮汐站位於橫瀾島橫瀾碼頭，負責測量潮汐，橫瀾碼頭是海事處轄下的政府碼頭。不幸的 是，該碼頭在2018年9月遭超級颱風「山竹」嚴重侵襲，對應天文台所說：「潮汐站和相關設 施在遭颱風吹襲期間被損壞。」 三年過去了，海事處終於在2021年8月2日發出海事工程公告，詳細說明橫瀾島碼頭的重建工
The tide gauge in question provides tidal measurements on Waglan Island at the Waglan Pier, a government pier maintained by Marine Department (MD). Unfortunately, the pier was severely damaged by Super Typhoon Mangkhut in September 2018 … and as the Observatory put it, “The tide station and related facilities were devastated during the strike.”
程。根據公告所說，重建工程預計需時8個月，即至2022年3月。該公告詳列以下橫瀾島區域 ((WGS84基準面)由 A 至 D 段及鄰近海岸線進行的重建工程：
Fast forward almost three years, and on 2 August 2021, MD issued a Marine Works Notice detailing the reconstruction of the Pier at Waglan Island, which is scheduled to take another eight months, which takes us to March 2022. The notice details the reconstruction works at the Island at the following location (WGS 84 Datum) from (A) to (D) and the adjacent shoreline:
(A) 22° 10.934’ N 114° 18.126’ E (B) 22° 10.994’ N 114° 18.078’ E (C) 22° 11.066’ N 114° 18.179’ E (D) 22° 11.012’ N 114° 18.223’ E Image courtesy of Marine Department
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