气候变化领域集成服务门户(CCPortal): Basin scale sources of siltation in a contaminated hydropower reservoir

CCPortal

DOI	10.1016/j.scitotenv.2024.169952
	Basin scale sources of siltation in a contaminated hydropower reservoir
	Bravo-Linares, Claudio; Ovando-Fuentealba, Luis; Munoz-Arcos, Enrique; Kitch, Jessica L.; Millward, Geoffrey E.; Lopez-Gajardo, Ricardo; Canoles-Zambrano, Marcela; Del Valle, Alfredo; Kelly, Claire; Blake, William H.
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	914
卷号	914
英文摘要	Siltation and the loss of hydropower reservoir capacity is a global challenge with a predicted 26 % loss of storage at the global scale by 2050. Like in many other Latin American contexts, soil erosion constitutes one of the most significant water pollution problems in Chile with serious siltation consequences downstream. Identifying the sources and drivers affecting hydropower siltation and water pollution is a critical need to inform adaptation and mitigation strategies especially in the context of changing climate regimes e.g. rainfall patterns. We investigated, at basin scale, the main sources of sediments delivered to one of the largest hydropower reservoirs in South America using a spatio-temporal geochemical fingerprinting approach. Mining activities contributed equivalent to 9 % of total recent sediment deposited in the hydropower lake with notable concentrations of sedimentassociated pollutants e.g. Cu and Mo in bed sediment between the mine tributary and the reservoir sediment column. Agricultural sources represented ca. 60 % of sediment input wherein livestock production and agriculture promoted the input of phosphorus to the lake. Evaluation of the lake sediment column against the tributary network showed that the tributary associated with both dominant anthropogenic activities (mining and agriculture) contributed substantially more sediment, but sources varied through time: mining activities have reduced in proportional contribution since dam construction and proportional inputs from agriculture have increased in recent years, mainly promoted by recent conversion of steep lands from native vegetation to agriculture. Siltation of major hydropower basins presents a global challenge exemplified by the Rapel basin. The specific challenges faced here highlight the urgent need for co -design of evidence -led, context -specific solutions that address the interplay of drivers both within and without the basin and its communities, enhancing the social acceptability of sediment management strategies to support the sustainability of clean, hydropower energy production.
英文关键词	Water-energy-food security; Basin scale; Sediments; Fingerprinting; Contaminants
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001164292800001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302514
作者单位	Universidad Austral de Chile; University of Plymouth
推荐引用方式 GB/T 7714	Bravo-Linares, Claudio,Ovando-Fuentealba, Luis,Munoz-Arcos, Enrique,et al. Basin scale sources of siltation in a contaminated hydropower reservoir[J],2024,914.
APA	Bravo-Linares, Claudio.,Ovando-Fuentealba, Luis.,Munoz-Arcos, Enrique.,Kitch, Jessica L..,Millward, Geoffrey E..,...&Blake, William H..(2024).Basin scale sources of siltation in a contaminated hydropower reservoir.SCIENCE OF THE TOTAL ENVIRONMENT,914.
MLA	Bravo-Linares, Claudio,et al."Basin scale sources of siltation in a contaminated hydropower reservoir".SCIENCE OF THE TOTAL ENVIRONMENT 914(2024).