干旱区生态环境知识资源中心(Arid): Understanding sedimentation at the El Molinito reservoir (NW Mexico) before and after dam construction using physical sediment analyses

Arid

DOI	10.1016/j.jsames.2021.103401
	Understanding sedimentation at the El Molinito reservoir (NW Mexico) before and after dam construction using physical sediment analyses
	Munoz-Salinas, E.; Castillo, M.; Romero, F.; Correa-Metrio, A.
通讯作者	Munoz-Salinas, E (corresponding author), Univ Nacl Autonoma Mexico, Inst Geol, Estn Reg Noroeste, Av Luis Donaldo Colosio, Hermosillo 83200, Sonora, Mexico.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	111
英文摘要	Sediments stored in reservoirs provide useful information about landscape erosion rates that are needed for understanding the geomorphologic evolution of sites and also for engineering purposes. In arid and semi-arid landscapes, the differentiation of sedimentation pulses is required since landscape erosion usually occurs in short periods and involves the mobilization of large volume of sediments. We analyzed the sediments stored at the El Molinito dam, that was built in 1991, which is located in the lower course of the Sonora river, NW Mexico. The river basin of the study area is dominated by arid to semi-arid conditions, where human activities are characterized by the extensive grazing for cattle and open-pit mining. The physical properties of sediments were analyzed using OSL, fall-out Cs-137, K-40 and magnetic susceptibility (MS) from four sediment cores. We found that the IRSL/BLSL and MS reveal how the density of grains settled at different parts of the reservoir changed prior and after the dam construction. The K-40 data exhibit a similar result as the IRSL/BLSL and MS values. The activity of Cs-137 has a similar pattern prior and after the dam construction, what indicates that this tracer is unaffected by the dam construction. We found that the Cs-137 is a reliable indicator of how rainfall relates to erosion within the river basin. We conclude that the IRSL/BLSL and MS analysis can aid the interpretation of how sediment is mobilized prior to their deposition and transport in arid to semi-arid landscapes where erosion is episodic and seasonal. Moreover, the approach used in this research can be used for engineering studies to accurately identify the depth at which the sedimentation of reservoir initiates and to estimate the different sedimentation rates. We also found that the analysis of Cs-137 in the sediments stored in the dam also yield useful information of the dominant landscape dynamics. This information is valuable using climate data since they allow the understanding of the main mechanisms related to the sediment routing from source-to-sink in dams built around the 1950s.
英文关键词	Sediment transport OSL Magnetic susceptibility (MS) Fall-out Cs-137 El molinito dam NW Mexico
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000700275000001
WOS关键词	SOIL-EROSION ; MAGNETIC-SUSCEPTIBILITY ; CESIUM-137 MEASUREMENTS ; LANDSCAPE DYNAMICS ; STORAGE CAPACITY ; RIVER-BASIN ; LUMINESCENCE ; CATCHMENT ; PATTERNS ; IMPACTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	Universidad Nacional Autónoma de México
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364029
作者单位	[Munoz-Salinas, E.; Castillo, M.] Univ Nacl Autonoma Mexico, Inst Geol, Estn Reg Noroeste, Av Luis Donaldo Colosio, Hermosillo 83200, Sonora, Mexico; [Munoz-Salinas, E.; Castillo, M.] Univ Nacl Autonoma Mexico, Lab Nacl Geoquim & Mineral, Ciudad Univ, Mexico City 04510, DF, Mexico; [Romero, F.; Correa-Metrio, A.] Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico; [Correa-Metrio, A.] Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Queretaro, Mexico
推荐引用方式 GB/T 7714	Munoz-Salinas, E.,Castillo, M.,Romero, F.,et al. Understanding sedimentation at the El Molinito reservoir (NW Mexico) before and after dam construction using physical sediment analyses[J]. Universidad Nacional Autónoma de México,2021,111.
APA	Munoz-Salinas, E.,Castillo, M.,Romero, F.,&Correa-Metrio, A..(2021).Understanding sedimentation at the El Molinito reservoir (NW Mexico) before and after dam construction using physical sediment analyses.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,111.
MLA	Munoz-Salinas, E.,et al."Understanding sedimentation at the El Molinito reservoir (NW Mexico) before and after dam construction using physical sediment analyses".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 111(2021).