香港现代海平面变化及其影响(英文)

RECENT SEA-LEVEL CHANGES IN HONG KONG AND THEIR IMPLICATIONS

潮汐站资料分析表明香港地区海平面每年以1mm的速度上升．然而，在沿海填海地区，由于受长期地面沉陷的影响，下沉速度超过上升速度，导致海平面明显相对上升．受大规模地面沉陷的影响，填海区在台风暴潮期间极易受海水浸淹．为了有助于未来海岸的开发，建议利用现有技术水平的测量方法，包括卫星测高和激光测距方法等，对填海区进行长期连续的地面沉陷监测．对下沉问题提出预警，以便采取措施，如修筑海堤、建抽水站等，以抵御海水入侵造成的灾害．

An analysis of data collected from tide gauges has indicated that the sea-level in Hong Kong area is undergoing uplift at a rate of about 1 mm/year. However, in coastal land reclamations under the influence of Iong term ground settlement, tea rate of subsidence may exceed the rate of uplift resulting in an apparent relative sea-level rise. ConSequendy, reclaimed land affected by large amounts of ground settlement are suscegtible to marine inundation during storm surges generated by typhoons. In order to assist future coastal develoPment. it is recommeded that continuous monitoring of long term ground settlement is carried out on the reclaimed land using state-of-the-art surveying methods including satellite altimetry and laser ranging. This is needed to provide warning on subosience problems so that measures including sea defence by dykes and flood Pumping stations may be used to address the problem Of flood damage.