干旱区生态环境知识资源中心(Arid): A significant shift in particulate organic matter characteristics during flooding of River Krishna, eastern peninsular India

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DOI	10.18520/cs/v118/i3/461-467
	A significant shift in particulate organic matter characteristics during flooding of River Krishna, eastern peninsular India
	Babu, C. Prakash 1; Ramaswamy, V 2; Rao, P. S.3; Sarma, V. V. S. S.4; Kumar, P. Praveen 5
通讯作者	Babu, C. Prakash
来源期刊	CURRENT SCIENCE
ISSN	0011-3891
出版年	2020
卷号	118 期号:3 页码:461-467
英文摘要	Extremely heavy rainfall over a small, semi-arid section of the Indian Peninsula in October 2009, together with release of water from dams resulted in very severe flooding in River Krishna. The sources and type of organic matter during and after the floods were studied by analysing suspended particulate matter (SPM) for organic carbon (C), total nitrogen (N) and isotopic composition of C (delta C-13(org)). The delta C-13(org) varied from -21.4% during the initial heavy flood phase to -27.1% in the final receding phase. Discharge of terrestrial carbon (-21.4% to -23.5%) from mixed sources with high C/N ratios (14-19) during the initial phase of the flood originated from the semi-arid section of the river. The light carbon (-25.5% to -27.1%) with low C/N ratios (7.2-9.5) in the receding phase of the flood was from local C3-rich organic debris from the deltaic regions along with phytoplankton from aquatic sources. Since the average suspended sediment discharge of River Krishna has decreased from 68 mt to less than 0.1 mt due to construction of dams and barrages, it appears that sediments and organic matter presently being delivered to the oceans are mainly during flood events, and the type of organic matter delivered depends on the nature of the soil where high rainfall is received.
英文关键词	Carbon isotopes extreme rainfall events rivers floods particulate organic matter
类型	Article
语种	英语
国家	India
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000512533600030
WOS关键词	C-13/C-12 RATIOS ; CARBON ; SEDIMENTS ; DELTA-C-13 ; TRANSPORT ; NITROGEN ; IMPACTS ; MARINE ; DELTAS ; FLUXES
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314305
作者单位	1.CSIR Natl Inst Oceanog, Panaji 403004, Goa, India; 2.Oceanis Soc, A-6, Bambolim 403202, Goa, India; 3.Flat 502,First Block, Caranzalem 403002, Goa, India; 4.CSIR Natl Inst Oceanog, Reg Ctr, Visakhapatnam 530017, Andhra Pradesh, India; 5.Natl Inst Anim Biotechnol, Hyderabad 500049, India
推荐引用方式 GB/T 7714	Babu, C. Prakash,Ramaswamy, V,Rao, P. S.,et al. A significant shift in particulate organic matter characteristics during flooding of River Krishna, eastern peninsular India[J],2020,118(3):461-467.
APA	Babu, C. Prakash,Ramaswamy, V,Rao, P. S.,Sarma, V. V. S. S.,&Kumar, P. Praveen.(2020).A significant shift in particulate organic matter characteristics during flooding of River Krishna, eastern peninsular India.CURRENT SCIENCE,118(3),461-467.
MLA	Babu, C. Prakash,et al."A significant shift in particulate organic matter characteristics during flooding of River Krishna, eastern peninsular India".CURRENT SCIENCE 118.3(2020):461-467.