Distributive Characteristics of Riverine Nutrients in the Mun River, Northeast Thailand: Implications for Anthropogenic Inputs

doi:10.3390/w11050954

	Distributive Characteristics of Riverine Nutrients in the Mun River, Northeast Thailand: Implications for Anthropogenic Inputs
	Liu, Jinke 1; Han, Guilin 1; Liu, Xiaolong 2; Liu, Man 1; Song, Chao 3; Yang, Kunhua 1; Li, Xiaoqiang 1; Zhang, Qian 1,4
刊名	WATER
	2019-05-01
卷号	11 期号:5 页码:14
关键词	water chemistry dissolved carbon dissolved nitrogen dissolved silicon Mun River northeast Thailand
ISSN号	2073-4441
DOI	10.3390/w11050954
通讯作者	Han, Guilin(hanguilin@cugb.edu.cn)
英文摘要	The nutrient contents of Mun River water in northeast Thailand during the dry season were measured to investigate the effect of human activities on dissolved load species. Dissolved organic carbon (DOC) values varied from 2.5 to 17.1 mg/L, averaging 9.0 mg/L; dissolved inorganic nitrogen (DIN) ranged between 0.12 and 0.11 mg/L; Cl- values ranged from 1.7 to 668.6 mg/L, with an average value of 84.8 mg/L; dissolved silicon (DSi) varied from 1.7 to 9.9 mg/L; and SO42- values averaged 8.9 mg/L. DOC, Cl-, and SO42- contents decreased with the flow direction. The high concentrations of DOC, K+, Cl-, and SO42- in the upper reaches were closely related to anthropogenic inputs, specifically industrial sewage. The covariation demonstrated that these dissolved loads may have the same sources. In other regions, Cl- contents were derived from weathering products. DIN contents maintained the same level on the river, and few sampling sites with high concentrations of DIN were influenced by point source pollution. The extremely low P concentrations limited algal growth, and the DSi showed no clear relationship with N and K, indicating that DSi in the Mun River was controlled by the weathering input rather than biological effects. The exact reverse spatial distributions of DOC between the wet and dry seasons (which increased with the flow direction in the wet season) were due to different precipitation rates, and the rare rainfall in the dry season had difficulty flushing the soil and transporting soil organic matter into the rivers. The local government should control sewage discharge and optimize farming methods.
资助项目	National Natural Science Foundation of China[41661144029] ; National Natural Science Foundation of China[41325010]
WOS关键词	DISSOLVED ORGANIC-CARBON ; DOMINATED CATCHMENT ; MAJOR ELEMENTS ; SURFACE WATERS ; LAND-USE ; SILICATE ; BASIN ; CHEMISTRY ; NITROGEN ; CLIMATE
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000472680400084
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/58590]
专题	中国科学院地理科学与资源研究所
通讯作者	Han, Guilin
作者单位	1.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China 2.Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China 3.Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Hebei, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jinke,Han, Guilin,Liu, Xiaolong,et al. Distributive Characteristics of Riverine Nutrients in the Mun River, Northeast Thailand: Implications for Anthropogenic Inputs[J]. WATER,2019,11(5):14.
APA	Liu, Jinke.,Han, Guilin.,Liu, Xiaolong.,Liu, Man.,Song, Chao.,...&Zhang, Qian.(2019).Distributive Characteristics of Riverine Nutrients in the Mun River, Northeast Thailand: Implications for Anthropogenic Inputs.WATER,11(5),14.
MLA	Liu, Jinke,et al."Distributive Characteristics of Riverine Nutrients in the Mun River, Northeast Thailand: Implications for Anthropogenic Inputs".WATER 11.5(2019):14.