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	Modeling Watershed-Scale Nitrogen Loading Reduction Efficiency of an Agricultural Conservation Management by Scenario Analysis
	Zeng, Zhaoxia; Liu, Xiaoli; Chen, Qiuwen; Tie, Baiqing
	2013
会议名称	35th World Congress of the International-Association-for-Hydro-Environment-Engineering-and-Research (IAHR)
会议日期	SEP 08-13, 2013
会议地点	Chengdu, PEOPLES R CHINA
关键词	Agricultural watershed Agricultural conservation management SWAT model Nitrogen Black soil region
英文摘要	Agricultural Conservation Management (ACM) is increasingly advocated to reduce losses of nutrition from farming lands, especially with agricultural watershed and subwatershed perspectives. Within agricultural watershed scale, different crop coverage has different nutrient precipitation runoff non-point source load properties because of their spatial topography heterogeneity and variable fertilization demands. The objective of this study was to assess the reduction efficiency of an ACM on nitrogen non-point source load from small agricultural watershed, in the black soil region, northeast of china, where present typical gentle hilly landscapes, using the Soil and Water Assessment Tool (SWAT). Results showed that SWAT model performed well in calculating runoff (E-NS=0.58), NO3-N (E-NS=0.47) and total N (E-NS=0.69) loads. The calibrated and validated model was used to evaluate the effects of spatial adjustment of crops plantation on NO3-N and total N loads through land use pattern scenario analysis according to crop different fertilization demand and surface runoff nitrogen loss characteristics. Result showed that crops plantation spatial adjustment as an effective ACM strategy can reduce NO3-N and total N loads by 9.5% and 10.7%, respectively. It was apparent that within small watershed scale, crops plantation spatial regulation according to their fertilizer demand, nutrition loads properties and locations as an ACM can effectively decrease non-point source pollution from agricultural watershed, and can provide useful information for targeted water quality management for surface runoff receptor water body.
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24579]
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	Zeng, Zhaoxia,Liu, Xiaoli,Chen, Qiuwen,et al. Modeling Watershed-Scale Nitrogen Loading Reduction Efficiency of an Agricultural Conservation Management by Scenario Analysis[C]. 见:35th World Congress of the International-Association-for-Hydro-Environment-Engineering-and-Research (IAHR). Chengdu, PEOPLES R CHINA. SEP 08-13, 2013.

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