Sea-Level Rise on Eastern China's Yangtze Delta
Sea-Level Rise on Eastern China's Yangtze Delta
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发表时间：
1998-01
影响因子：
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通讯作者：
Zhongyuan Chen;D. Stanley
中科院分区：
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作者：
Zhongyuan Chen;D. Stanley
长江三角洲是一个人口稠密、地势低洼的地区，极易受到洪水、涨潮和台风的影响。以往的研究表明，长江三角洲南部平原的相对海平面在7500-4000 yr. BP之间呈上升趋势，在过去的3000 yr. BP期间，相对海平面逐渐下降并稳定在现在的msl左右。早期海平面曲线的重新评估和三角洲平原沉降的测量，以及从~7000到3000年BP的史前栖息地基础的分析。这种相对上升的后果包括难以将水从低洼的三角洲平原排到海岸以及相关的洪水破坏。长江三峡大坝的建成将控制长江的洪水，但减少三角洲平原上的沉积物积累，这反过来又可能加速这个重要粮仓的盐水泛滥。
The Yangtze delta is a densely populated, low-lying region highly vulnerable to flooding, high tides and typhoons. All previous studies indicated that relative sea level was higher from ~7500-4000 yrs. BP, then lowered and stabilized at about present msl during the past 3000 yrs. To the contrary, we find that sea level has been rising relative to the southern Yangtze delta plain based on new sea-level data derived from dated peats, reassessment of earlier sea-level curves and measurement of delta plain subsidence and analysis of prehistoric habitat bases from ~7000 to 3000 yrs. BP. Consequences of this relative rise include difficulty in expelling water from the low-lying delta plain to the coast and associated flood damage. Emplacement of the 3-Gorges Dam on the Yangtze will control flooding of the Yangtze river but decrease sediment accumulation on the delta plain that, in turn, is likely to accelerate saline inundation of this vital breadbasket.