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海平面上升,海岸带灾害与海岸防护问题 预览 被引量:29

SEA LEVEL RIST, COASTAL DISASTER AND COASTAL PROTECTION
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摘要 全球变暖导致海平面上升。近百年来中国海平面以1.4 ̄2.0mm/a的平均速率上升,预计下世纪还将加速,几个大河三角洲沿岸因受地面下沉影响,2050年相对海平面上升幅度可能高出IPCC(1990)最佳估计值的1倍左右。海平面上升会加剧多种海岸带灾害,尤其是台风风暴潮的发生数和成灾数增加。近20年来由于沿海人口、资产密度剧增以及海堤标准偏低,致使风暴潮灾损失逐年增大,预计下世纪海岸带灾害损失还将大幅度 The average rate of sea level rise in China was observed as fast as 1.4~2.0mm/a in recent century. It has been estimated that the sea level rise in China will be speed up in next century. Due to the ground subsidence in deltas of big rivers the relative sea level rise along the coast of those deltas in 2050 will be as twice as the best global estimation calculatcd by IPCC(1990). Sea level risc can aggravate several kinds of coastal disasters, especially typhoon and storm surge. Rapid growth in population and asset density in recent 20 years as ewell as low standard of sea wall alogn the coast has increased year by year disaster losses generated by storm surge. It has been predicted that the losses in coastal disaster will increase tremendously in next century .Sea level rise, coastal disaster development and more and more low tidal flat inning made it imperative to recognize the significance of coastal protection in development of regional economy. It is necessary to increase investment, to strengthen and protect sea wall and coast as well as beach and tidal flat, to apply comprehensive measurements including engineering and ecological approaches, in order to upgrade the standard of sea wall along the most of coast in China in the near future.
作者 季子修 施雅风 Jj Zixui Shi Yafeng(Nanjing Institute of Geography & Limnology, Academia Sinica, Nanjing)
出处 《自然灾害学报》 CSCD 1996年第2期 56-64,共9页 Journal of Natural Disasters
关键词 海平面上升 海岸带 灾害 风暴潮 海岸防护 Natural disaster Sea level rise Coastal disaster Storm surge Coastal protection
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