Rapid coastal subsidence in the central Ganges-Brahmaputra Delta (Bangladesh) since the 17th century deduced from submerged salt-producing kilns
Rapid coastal subsidence in the central Ganges-Brahmaputra Delta (Bangladesh) since the 17th century deduced from submerged salt-producing kilns
复制标题
恒河-雅鲁藏布江三角洲（孟加拉国）中部地区自 17 世纪以来海岸快速沉降源自水下盐窑
作者：
Hanebuth TJJ;Kudrass HR;Linstädter J;Islam B;Zander AM
人口稠密、地势低洼的恒河-雅鲁藏布江三角洲极易受到全球海平面上升的影响。为了估计三角洲的沉降速度，我们检查了沿海孙德尔本斯（一个受联合国教科文组织保护的巨大红树林）的水下制盐窑遗址。这些窑炉建在当时冬季春季涨潮水位之上，但它们的基地目前位于相应的现代水位以下约155厘米。根据光学激发发光（OSL）测年法，这些窑最后一次烧制是在大约300年前，盐的生产因一场影响不同层次和位置的窑址的灾难性事件而终止。窑底木炭的14C年龄和相关的红树林树桩地平线支持OSL日期。根据海拔高度和年龄，外三角洲300年的平均沉降速率为5.2±1.2 mm/yr，其中包括0.8 mm/yr的海平面上升。随着海平面进一步加速上升的预期，已经存在的问题将会加剧，只有谨慎控制沉积物的增加才能使孟加拉国南部保持在海平面以上。
The densely populated, low-lying Ganges-Brahmaputra Delta is highly vulnerable to global sea-level rise. In order to estimate the rate of subsidence of the delta, we examined submerged salt-producing kiln sites in the coastal Sundarbans (a huge UNESCO-protected mangrove forest). These kilns were built just above the winterly spring high-tide level of the time, but their bases are currently located ∼155 cm below the corresponding modern level. According to optically stimulated luminescence (OSL) dating, the kilns were last fired ∼300 yr ago, and salt production was terminated by a catastrophic event that affected the kiln sites at different levels and locations.14C ages of charcoal at the kilns’ bases and associated mangrove stump horizons support the OSL dates. Based on the elevations and ages, the 300 yr average rate of sinking of the outer delta is 5.2 ± 1.2 mm/yr, which includes 0.8 mm/yr of eustatic sea-level rise. With the expectation of further acceleration of sea-level rise, the already-present problematic situation will be aggravated, and only prudent control of sediment accretion will keep southern Bangladesh above sea level.
东印度公司政府对孟加拉的盐业垄断
DOI：
10.1163/156852078x00161
发表时间：
1978
影响因子：
0.7
作者：
A. Serajuddin
通讯作者：
A. Serajuddin
尼罗河三角洲下沉的过去：与全新世压实和气候驱动的沉积物供应变化之间的可量化联系？
影响因子：
5.8
作者：
N. Marriner;C. Flaux;C. Morhange;D. Kaniewski
通讯作者：
D. Kaniewski
孟加拉国恒河-雅鲁藏布江下游三角洲平原的现代沉积物供应
影响因子：
2.1
作者：
M. Allison;E. B. Kepple
通讯作者：
E. B. Kepple