干旱区生态环境知识资源中心(Arid): Deciphering Depositional Environment of Playa Lakes Using Grain Size Parameters in the Arid and Semi-Arid Region of Rajasthan, India

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DOI	10.3390/agriculture12122043
	Deciphering Depositional Environment of Playa Lakes Using Grain Size Parameters in the Arid and Semi-Arid Region of Rajasthan, India
	Kumar, Manish; Dashora, Milap; Kumar, Rajesh; Dubey, Swatantra Kumar; Gupta, Pankaj Kumar; Kumar, Alok
通讯作者	Kumar, A
来源期刊	AGRICULTURE-BASEL
EISSN	2077-0472
出版年	2022
卷号	12 期号:12
英文摘要	This study encompasses the grain size distribution of the playa lakes (Pachpadra, Pokhran, and Didwana) of the Thar Desert in Rajasthan, India. The grain size of sediment particles is the most fundamental feature, giving essential information regarding their origin, transport history, and depositional conditions. The aeolian and fluvial transport processes were evaluated through environmentally sensitive grain size subpopulations to identify the differential sedimentary sources and dynamics in the playas. End-member modelling further determined the sediment grain size distribution through statistical analysis. The playa sediments mainly consist of very fine sand (46-54%) and very coarse silt (22-37%). The results show that the average fine fraction of Pachpadra, Pokhran, and Didwana playa was 46.29%, 66.11%, and 66.28%, respectively. In contrast, the average coarser fraction deposition in Pachpadra, Pokhran, and Didwana corresponds to 53.71%, 33.89%, and 33.72%, respectively. This suggests that the playas mostly contain aeolian sediment rather than fluvial sediment transported by dust/sand storms. Additionally, the textural pattern and depositional distribution of the sediments determined through the Passega CM diagram and bivariate plots indicate that 82% of the samples were poorly sorted, and 18% were very poorly sorted. Furthermore, an environmentally sensitive grain size component (ESGSC) was also assessed to identify the spatial variability and transport processes of sediment between these playas. Three ESGSCs in Pokhran (250 mu, 31 mu, and 2 mu) and Pachpadra (125 mu, 31 mu, and 4 mu), while two ESGSCs in Didwana playa (125 mu and 16 mu) were identified, indicating sediment deposition with moderate velocity in a low energy environment with a mixed sediment population transported by aeolian and fluvial activities.
英文关键词	playa lakes depositional environment end-member modelling environmentally sensitive grain size sediment arid
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000902041000001
WOS关键词	QINGHAI-TIBETAN PLATEAU ; CHINESE LOESS PLATEAU ; LACUSTRINE SEDIMENTS ; LEVEL FLUCTUATIONS ; PLEISTOCENE LOESS ; THAR DESERT ; END-MEMBERS ; GEOCHEMISTRY ; TRANSPORT ; EVOLUTION
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391719
推荐引用方式 GB/T 7714	Kumar, Manish,Dashora, Milap,Kumar, Rajesh,et al. Deciphering Depositional Environment of Playa Lakes Using Grain Size Parameters in the Arid and Semi-Arid Region of Rajasthan, India[J],2022,12(12).
APA	Kumar, Manish,Dashora, Milap,Kumar, Rajesh,Dubey, Swatantra Kumar,Gupta, Pankaj Kumar,&Kumar, Alok.(2022).Deciphering Depositional Environment of Playa Lakes Using Grain Size Parameters in the Arid and Semi-Arid Region of Rajasthan, India.AGRICULTURE-BASEL,12(12).
MLA	Kumar, Manish,et al."Deciphering Depositional Environment of Playa Lakes Using Grain Size Parameters in the Arid and Semi-Arid Region of Rajasthan, India".AGRICULTURE-BASEL 12.12(2022).