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Essay On Landslides In Hong Kong

1774 Words8 Pages

Introduction Hong Kong is prone to landslide hazard. With hilly terrain occupying more than 60% of Hong Kong’s land, coupled with seasonally high rainfall, about 300 landslides are recorded every year. Lacking extensive flat land, urban development is encroaching the hillside, buildings and infrastructure that are built on or near to slopes are vulnerable to landslide hazard. In order to reduce the landslide risk, Hong Kong has adopted adjustment measures against landslide hazard, in terms of protection through engineering works, mitigation works to minimize the loss during a landslide, and adaptation works to reduce vulnerability. In this essay, different categories of adjustment work will be introduced, and they will be evaluated in terms of the effectiveness and efficiency in reducing the landslide risk in Hong Kong. Background of landslide hazard in Hong Kong …show more content…

In addition, Hong Kong has an average annual rainfall of over 2,000 mm, intense rainstorms and prolonged rainfall are common in spring and summer brought by low pressure troughs and tropical cyclones. During the wet season, Hong Kong faces the threat of landslides. Most of the landslides in Hong Kong are small-scale, but due to the proximity of urban development to the slopes, Hong Kong is vulnerable to landslide hazard due to the combination of the chance of landslides and the potential huge loss in case of landslide. A series of catastrophic landslides in the 1970’s has led to the establishment of Geotechnical Engineering Office (GEO) to tackle the landslide hazard. GEO, together with other governmental institutions such as Hong Kong Observatory (HKO), have taken adjustment measures to alleviate the landslide risk. In the following sections, different protection, mitigation and adaptation works in Hong Kong are introduced and evaluated

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