气候变化领域集成服务门户(CCPortal): Persistent impact of Fukushima decontamination on soil erosion and suspended sediment

CCPortal

DOI	10.1038/s41893-022-00924-6
	Persistent impact of Fukushima decontamination on soil erosion and suspended sediment
	Feng, Bin; Onda, Yuichi; Wakiyama, Yoshifumi; Taniguchi, Keisuke; Hashimoto, Asahi; Zhang, Yupan
发表日期	2022
ISSN	2398-9629
起始页码	879
结束页码	889
卷号	5 期号:10 页码:11
英文摘要	Mechanical soil decontamination is an important tool in remediating contaminated soils. Remediation efforts following the Fukushima Daiichi disaster increased soil erosion and downstream sediment loads that showed reduced Cs-137 concentrations, but rapid revegetation quickly restored decontaminated landscapes. In Fukushima, government-led decontamination reduced radiation risk and recovered Cs-137-contaminated soil, yet its long-term downstream impacts remain unclear. Here we provide the comprehensive decontamination impact assessment from 2013 to 2018 using governmental decontamination data, high-resolution satellite images and concurrent river monitoring results. We find that regional erosion potential intensified during decontamination (2013-2016) but decreased in the subsequent revegetation stage. Compared with 2013, suspended sediment at the 1-year-flood discharge increased by 237.1% in 2016. A mixing model suggests that the gradually increasing sediment from decontaminated regions caused a rapid particulate Cs-137 decline, whereas no significant changes in downstream discharge-normalized Cs-137 flux were observed after decontamination. Our findings demonstrate that upstream decontamination caused persistently excessive suspended sediment loads downstream, though with reduced Cs-137 concentration, and that rapid vegetation recovery can shorten the duration of such unsustainable impacts. Future upstream remediation should thus consider pre-assessing local natural restoration and preparing appropriate revegetation measures in remediated regions for downstream sustainability.
学科领域	Green & Sustainable Science & Technology; Environmental Sciences; Environmental Studies
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS记录号	WOS:000825199100001
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/272769
作者单位	University of Tsukuba; Fukushima University
推荐引用方式 GB/T 7714	Feng, Bin,Onda, Yuichi,Wakiyama, Yoshifumi,et al. Persistent impact of Fukushima decontamination on soil erosion and suspended sediment[J],2022,5(10):11.
APA	Feng, Bin,Onda, Yuichi,Wakiyama, Yoshifumi,Taniguchi, Keisuke,Hashimoto, Asahi,&Zhang, Yupan.(2022).Persistent impact of Fukushima decontamination on soil erosion and suspended sediment.NATURE SUSTAINABILITY,5(10),11.
MLA	Feng, Bin,et al."Persistent impact of Fukushima decontamination on soil erosion and suspended sediment".NATURE SUSTAINABILITY 5.10(2022):11.