山泥傾瀉ge措施

當持續大雨極有可能導致大量山泥傾瀉時，香港天文台會同土力工程處即發出山泥傾瀉警告。這項警告旨在針對數目較多而影響廣泛的山泥傾瀉情況，所以一些因雨勢較小而未能預測到的局部地區性山泥傾瀉，仍會在山泥傾瀉警告沒有生效的時候出現。

當山泥傾瀉警告發出後，天文台會即時透過電台及電視台向市民廣播有關山泥傾瀉特別報告。這項特別報告會定時更新，直至出現山泥傾瀉的可能性減低為止。

天文台在日常天氣預報之外再發出山泥傾瀉警告，目的在促使市民注意大雨可能引致山泥傾瀉，讓市民做好預防措施。此外，這項警告對工程師、承建商及其他容易因山泥傾瀉而引致損失的人士亦有預警作用；並提醒有關政府部門及機構採取相應行動，例如開放臨時庇護所、準備搜索和救援工作、部分學校可能需要停課及安排提供援助等工作。山泥傾瀉警告會在必需時發出，無論當時是否已經發出其他惡劣天氣的警告，如熱帶氣旋警告信號和暴雨警告信號。

山泥傾瀉警告猶如其他天氣預報一樣，是根據最新資料而判斷出最有可能出現的天氣狀況。因此難免在發出山泥傾瀉警告後，大雨並未造成山泥傾瀉；又或者突然形成的大雨在警告發出前已經在本港部分地區造成山泥傾瀉。

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圖片參考：http://www.hko.gov.hk/publica/gen_pub/land_rf_map_e.jpg

Rainfall distribution of a heavy rain case on 4 June 1997 showing the rain was heaviest over Kwai Chung and northern part of Kowloon. (Isohyets are in millimetres)




Meteorological Watch
In order to issue timely warnings to the public, the Hong Kong Observatory keeps a continuous watch of the weather in and around Hong Kong. Readings from a network of more than 70 automatic rain-gauges covering the whole of the Special Administrative Region are telemetered to the Observatory Headquarters to provide real-time information essential for assessing the likelihood of landslips. In addition to conventional meteorological observations, the Observatory's weather radar system provides a good means to continuously monitor the movement and development of rain-bearing clouds. Meteorological satellite imagery at high resolution is received at frequent intervals, providing a bird's eye view of cloud patterns over Asia and the western Pacific.










圖片參考：http://www.hko.gov.hk/publica/gen_pub/land_rad.jpg

Echoes captured by the Hong Kong Observatory weather radar at 6:18 a.m. on 4 June 1997 when heavy rain associated with an active trough of low pressure was affecting Hong Kong.




Points to Note

Listen to radio or television broadcasts on the latest warnings. Contact your district office or the nearest police station in emergencies.

Take appropriate measures to avoid possible damage or loss of life due to landslips. When the Landslip Warning is in force, you should cancel non-essential appointments, stay at home or in a safe shelter. Pedestrians should avoid walking or standing close to steep slopes and retaining walls. Motorists should avoid driving in hilly areas or on roads with landslip warning signs.

If you have received a notice to evacuate because of landslip danger, or if you believe that your home is endangered by an unstable slope or retaining wall, or overhanging boulders, you should make immediate arrangements to move to a safe shelter.

Once the Landslip Warning is issued, temporary shelters will be provided by the Home Affairs Department. You may call the HAD emergency hotline at 2835 1473 to locate the temporary shelter nearest to you.

For an update on the state of weather warnings members of the public may call the Observatory Dial-a-Weather service at 187 8200, or the Observatory Internet homepage (http://www.weather.gov.hk).
圖片參考：http://hk.yimg.com/i/icon/16/35.gif