气候变化领域集成服务门户(CCPortal): The contribution of coastal land subsidence to potential sea-level rise impact in data-sparse settings: The case of Ghana's Volta delta

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DOI	10.1016/j.qsa.2024.100175
	The contribution of coastal land subsidence to potential sea-level rise impact in data-sparse settings: The case of Ghana's Volta delta
	Avornyo, Selasi Yao; Minderhoud, Philip S. J.; Teatini, Pietro; Seeger, Katharina; Hauser, Leon T.; Woillez, Marie-Noelle; Jayson-Quashigah, Philip-Neri; Mahu, Edem; Kwame-Biney, Michael; Addo, Kwasi Appeaning
发表日期	2024
ISSN	2666-0334
起始页码	14
卷号	14
英文摘要	Deltas are highly valuable environmental systems, ensuring various livelihoods through their ecosystem services. However, human impact and climate change stressors are impacting deltas immensely. Consequently, many deltas, including Ghana's Volta Delta, are facing increasing risks, especially as hazards are increasing in magnitude and impacting coastal livelihoods. To provide a better understanding of coastal hazards in the Volta Delta, this study assessed the Delta's subsidence regime and its consequences for the potential impact of sea-level rise (SLR). Using the Interferometric Synthetic Aperture Radar (InSAR) technique and Global Navigation Satellite System (GNSS) surveys, vertical land motion (VLM) was documented. Interferograms of Sentinel-1 data from 2016 to 2020 indicated subsiding rates of up to -9.2 mm/yr. By combining local VLM information with recent SLR projections and elevation data, this study updates those projections and provides local assessments of potential Relative SLR (rSLR) impact. According to these locally improved scenarios, up to similar to 45 % of the Delta will fall below local sea level by 2100, of which close to 10 % is explained by the integration of local VLM data alone. Depending on the climate change scenarios used, land subsidence will increase the deltaic area at risk by 4.31 % (96.27 km(2)) to 10.18 % (227.64 km(2)) and consequently exacerbate its exposure to coastal inundation. To avert the projections, the study recommends robust monitoring regimes; alternative freshwater sources to groundwater; reduced sediment trapping and river obstruction; and the need to stall ongoing oil and gas prospecting and subsequent extraction in the Voltain Basin.
英文关键词	Land subsidence; PS-InSAR; Relative sea -level rise; Flooding; Volta delta
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001219302500001
来源期刊	QUATERNARY SCIENCE ADVANCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/289126
作者单位	University of Ghana; Wageningen University & Research; University of Padua; Deltares; University of Cologne; University of Zurich; University of Ghana
推荐引用方式 GB/T 7714	Avornyo, Selasi Yao,Minderhoud, Philip S. J.,Teatini, Pietro,et al. The contribution of coastal land subsidence to potential sea-level rise impact in data-sparse settings: The case of Ghana's Volta delta[J],2024,14.
APA	Avornyo, Selasi Yao.,Minderhoud, Philip S. J..,Teatini, Pietro.,Seeger, Katharina.,Hauser, Leon T..,...&Addo, Kwasi Appeaning.(2024).The contribution of coastal land subsidence to potential sea-level rise impact in data-sparse settings: The case of Ghana's Volta delta.QUATERNARY SCIENCE ADVANCES,14.
MLA	Avornyo, Selasi Yao,et al."The contribution of coastal land subsidence to potential sea-level rise impact in data-sparse settings: The case of Ghana's Volta delta".QUATERNARY SCIENCE ADVANCES 14(2024).