气候变化领域集成服务门户(CCPortal): River bank instability from unsustainable sand mining in the lower Mekong River

CCPortal

DOI	10.1038/s41893-019-0455-3
	River bank instability from unsustainable sand mining in the lower Mekong River
	Hackney C.R.; Darby S.E.; Parsons D.R.; Leyland J.; Best J.L.; Aalto R.; Nicholas A.P.; Houseago R.C.
发表日期	2020
ISSN	2398-9629
起始页码	217
结束页码	225
卷号	3 期号:3
英文摘要	Recent growth of the construction industry has fuelled the demand for sand, with considerable volumes being extracted from the world’s large rivers. Sediment transport from upstream naturally replenishes sediment stored in river beds, but the absence of sand flux data from large rivers inhibits assessment of the sustainability of ongoing sand mining. Here, we demonstrate that bedload (0.18 ± 0.07 Mt yr−1) is a small (1%) fraction of the total annual sediment load of the lower Mekong River. Even when considering suspended sand (6 ± 2 Mt yr−1), the total sand flux entering the Mekong delta (6.18 ± 2.01 Mt yr−1) is far less than current sand extraction rates (50 Mt yr−1). We show that at these current rates, river bed levels can be lowered sufficiently to induce river bank instability, potentially damaging housing and infrastructure and threatening lives. Our research suggests that on the Mekong and other large rivers subject to excessive sand mining, it is imperative to establish regulatory frameworks that limit extraction rates to levels that permit the establishment of a sustainable balance between the natural supply/storage of sand and the rate at which sand is removed. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Banks (bodies of water); Construction industry; Extraction; Sand; Sediment transport; Stream flow; Current rate; Extraction rate; Mekong Delta; Mekong River; Regulatory frameworks; Sand extraction; Sediment loads; Suspended sand; Rivers
来源期刊	Nature Sustainability
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/163221
作者单位	Energy and Environment Institute, University of Hull, Hull, United Kingdom; School of Geography and Environmental Sciences, University of Southampton, Southampton, United Kingdom; Departments of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Department of Geography and GIS, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Ven Te Chow Hydrosystems Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, United States; College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Hackney C.R.,Darby S.E.,Parsons D.R.,et al. River bank instability from unsustainable sand mining in the lower Mekong River[J],2020,3(3).
APA	Hackney C.R..,Darby S.E..,Parsons D.R..,Leyland J..,Best J.L..,...&Houseago R.C..(2020).River bank instability from unsustainable sand mining in the lower Mekong River.Nature Sustainability,3(3).
MLA	Hackney C.R.,et al."River bank instability from unsustainable sand mining in the lower Mekong River".Nature Sustainability 3.3(2020).