Current and future mudflat losses in the southern Huanghe Delta due to coastal hard structures and shoreline retreat
Current and future mudflat losses in the southern Huanghe Delta due to coastal hard structures and shoreline retreat
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由于沿海硬质结构和海岸线后退，黄河三角洲南部当前和未来的滩涂损失
DOI：
10.1016/j.coastaleng.2019.103530
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发表时间：
2019-10
影响因子：
4.4
通讯作者：
Zhu Longhai
中科院分区：
文献类型：
--
作者：
Zhang Xiaodong;Lu Kai;Yin Ping;Zhu Longhai
由于沿海开发活动加剧、河流沉积物急剧减少和相对海平面迅速上升的共同影响，沿海湿地，特别是广阔的泥滩正面临前所未有的危机。然而，由于卫星图像上缺乏可靠的海岸线指标，特别是低潮时的海岸线指标，准确评估泥滩的演变仍然是一个巨大的挑战。本研究基于1983-2019年430幅Landsat卫星影像的瞬时岸线位置，采用海平面校正和统计分析方法研究了莱州泥滩的演变，准确评估了莱州泥滩的潮间带泥滩损失，并首次定量估算了多种因素特别是各种海岸硬结构对莱州泥滩演变的影响。结果表明：围堰造成的潮间带泥滩损失为98 km2，占潮间带泥滩总损失的93%；虽然以往滨平行构造造成的潮间带泥滩损失较小，但滨平行构造在未来将造成巨大的泥滩损失，如果目前滨平行构造的快速退退不得到改善，广阔的莱州泥滩将在110年内因滨平行构造的阻隔作用而消失。滨正构筑物的建设可以减缓邻近泥滩的海岸线后退，但加速下游的海岸线后退。就海岸防护而言，莱州泥滩不宜修建岸法构筑物。引流黄河泥沙13 M t /年可以完全抵消东营码头上游滩涂的损失，但东营码头下游的滩涂由于滨法结构对沿岸输沙的阻挡作用而难以恢复。另一种选择是拆除与海岸平行的结构，以恢复海岸线向陆地的运动，避免以土地损失为代价的泥滩损失。
Coastal wetlands, especially broad mudflats, are facing an unprecedented crisis due to combined influence of intensified coastal development activities, drastic river sediment reduction and rapid relative sea level rise. However, it is still a huge challenge to accurately assess the evolution of mudflats for the lack of reliable shoreline indicators on satellite images, especially the indicators for shoreline at low tide. This study, based on instantaneous shoreline positions derived from 430 Landsat satellite images during 1983–2019, uses sea level correction and statistical analysis methods to study the evolution of Laizhou Mudflat, and the intertidal mudflat loss in Laizhou Mudflat was accurately assessed and the effects of multiple factors, especially the effects of various coastal hard structures, on the evolution of Laizhou Mudflat were quantitatively estimated for the first time. The results show that the intertidal mudflat loss caused by the construction of cofferdams was 98 km2, 93% of the total intertidal mudflat loss. Although the previous intertidal mudflat loss caused by shore-parallel structures was less, the shore-parallel structures will cause great mudflat loss in the future, and the broad Laizhou Mudflat will disappear in 110 years owing to the barrier effect of the widespread shore-parallel structures if the current rapid shoreline retreat is not improved. The construction of shore-normal structures can slow the shoreline retreat of adjacent mudflat but accelerate downstream shoreline retreat. As far as coastal protection is concerned, the construction of shore-normal structures in Laizhou Mudflat is inadvisable. Diverting 13 M ton/year of Huanghe sediment can totally offset the mudflat loss on the upstream of Dongying Pier, however, the mudflat located on the downstream of Dongying Pier is hard to restore owing to the block effect of the shore-normal structures to the alongshore transported sediment. Another option is demolishing the shore-parallel structures to recover the landward movement of shoreline, avoiding the mudflat loss at the expense of land loss.
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DOI：
10.1038/ngeo129
发表时间：
2008-03
期刊：
Science & Engineering Faculty
影响因子：
--
作者：
T. Törnqvist;D. Wallace;J. Storms;J. Wallinga;R. V. Dam;M. Blaauw;Mayke S. Derksen;C. Klerks
通讯作者：
T. Törnqvist;D. Wallace;J. Storms;J. Wallinga;R. V. Dam;M. Blaauw;Mayke S. Derksen;C. Klerks
影响因子：
2.4
作者：
A. Molinas;Khaled A. Kheireldin;Baosheng Wu
通讯作者：
A. Molinas;Khaled A. Kheireldin;Baosheng Wu
影响因子：
18.3
作者：
Syvitski, James P. M.;Kettner, Albert J.;Nicholls, Robert J.
通讯作者：
Nicholls, Robert J.
影响因子：
18.3
作者：
J. Nittrouer;J. Best;C. Brantley;R. Cash;M. Czapiga;Praveen Kumar;G. Parker
通讯作者：
J. Nittrouer;J. Best;C. Brantley;R. Cash;M. Czapiga;Praveen Kumar;G. Parker
影响因子：
4.4
作者：
I. Wenneker;Bart Spelt;H. Peters;J. Ronde
通讯作者：
I. Wenneker;Bart Spelt;H. Peters;J. Ronde