Study on Relationship between Agricultural Nonpoint Source Pollution Output and Rainfall Runoff in the Typical Small Watershed of the Three Gorges Reservoir Area

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山区发展研究中心

	Study on Relationship between Agricultural Nonpoint Source Pollution Output and Rainfall Runoff in the Typical Small Watershed of the Three Gorges Reservoir Area
	Liao Xiaoyong
	2011-05
会议名称	Proceedings of 2011 international symposium on Water Resource and Environmental Protection
会议日期	2011.5.20
会议地点	Xi an,China
关键词	nonpoint source pollution small watershed rainfall runoff nitrogen to phosphorus ratio
页码	877-881
通讯作者	Chen Zhijian
英文摘要	Based on long term observation, the relationship between agricultural nonpoint source pollution output and rainfall runoff has been studied in Chenjiagou small basin (8 km²) and Daijiagou small watershed (0.67 km²)of the Three Georges Reservoir Area in Chongqing, southwest of China. The results showed that: a) The peak rainfall and runoff performed the similar variation trace in both of catchments in 2009 and the runoff played a major role in the output of nonpoint source pollution; b) Total nitrogen (TN) and total phosphorus (TP) concentration varied with consistent trend, but TN was more changeable with rainfall runoff than TP; c) TN losses was fluctuation in real time by rainfall runoff, however, TP losses showed a trend of increasing month by month, in addition, both of TN and TP are less changeable and less sensitively in Chenjiagou small basin than both of them in Daijiagou small watershed.; d) Variation of nitrogen to phosphorus ratio was similar to the TN concentration, and showed a good coupling relationship with the runoff fluctuation, TN played an important role in the nonpoint source pollution output in both of catchments; e) Significantly difference appeared in cumulative percentage between rainfall runoff peak time and TN and TP in 2009, and it's suggesting that nonpoint source pollution has a larger random and dispersion, there is no strict correspondence between them; f)The cumulative percentage of rainfall with runoff, TN with TP showed a good common features, what's more TN and TP changed significantly affected by the rainy season.
收录类别	EI
会议主办者	ISWREP2011 Organizing Committee Chair
会议录	Proceedings of 2011 international symposium on Water Resource and Environmental Protection
语种	英语
ISBN号	9781612843377
内容类型	会议论文
源URL	[http://192.168.143.20:8080/handle/131551/4471]
专题	成都山地灾害与环境研究所_山区发展研究中心
推荐引用方式 GB/T 7714	Liao Xiaoyong. Study on Relationship between Agricultural Nonpoint Source Pollution Output and Rainfall Runoff in the Typical Small Watershed of the Three Gorges Reservoir Area[C]. 见:Proceedings of 2011 international symposium on Water Resource and Environmental Protection. Xi an,China. 2011.5.20.