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	THE VARIATION TREND OF NUTRIENT FLUX FROM YANGTZE RIVER AND RELATED IMPACT ON YANGTZE ESTUARY
	Huang, G. X.; Chen, Q. W.; Cui, Y. P.; Ye, F.; Wang, B. D.
	2012
会议名称	6th International Conference on Asian and Pacific Coasts (APAC)
会议日期	DEC 14-16, 2011
会议地点	Univ Hong Kong, Hong Kong, PEOPLES R CHINA
英文摘要	Due to climate change and mankind actives, especially reservoirs' operation such as Three Gorge reservoirs (TGP) and pollutions from industry, agriculture and domestic sewage in the Yangtze River basin, the nutrient flux at Datong hydrological station has significant changes in recent years. Based on the data measured at Datong station in different period, the changing trend of nutrient flux including discharge, suspended solids (SS), total phosphorus (TP), total nitrogen (TN) are analyzed. Then a three-dimensional water quality model based partially on the open source code of Elfe, Wasp and EFDC are developed to simulate the C, N, P, Si cycling processes. The model is applied to the region from 120.6 degrees E to 124.5 degrees E and from 29.5 degrees N to 32.5 degrees N, including Yangtze estuary, Hangzhou bay and two important fishing grounds named Zhoushan and Lvsi. The upstream boundary condition at the Tianshenggang station in the 3D model are obtained by a 1D river water quality model which covers the region from Datong to Wusong using the related inflow at the Datong station. The downstream boundary conditions at open sea are given reasonably by a coarse grid model which including East China Sea. The measured data of Yangtze Estuary and Hangzhou Bay from 2004 to 2005 after TGP project are used to verify the model. The results show that the suspended sediment decreases continuously from annual value 4.6x10(8) to 2.6x10(8) in 2003 and then fall further to 1.3x10(8) ton in 2008. TP and TN have a rising trend because of increasing pollution load, especially from the middle and lower reach of Yangtze River in recent years. The variation of inflow flux of nutrient matter has great influence on the concentration of nutrients in the front of Yangtze delta where confluence region of Yangtze main inflow and upwelling from the out sea exists.
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24594]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Huang, G. X.,Chen, Q. W.,Cui, Y. P.,et al. THE VARIATION TREND OF NUTRIENT FLUX FROM YANGTZE RIVER AND RELATED IMPACT ON YANGTZE ESTUARY[C]. 见:6th International Conference on Asian and Pacific Coasts (APAC). Univ Hong Kong, Hong Kong, PEOPLES R CHINA. DEC 14-16, 2011.

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