Modeling nitrogen loadings from agricultural soils in southwest China with modified DNDC

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 > 山地表生过程与生态调控重点实验室

	Modeling nitrogen loadings from agricultural soils in southwest China with modified DNDC
	Deng, Jia 1; Zhu, Bo3 ; Zhou, Zaixing 1; Zheng, Xunhua 1; Li, Changsheng 2; Wang, Tao3 ; Tang, Jialiang3
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
	2011-06-03
卷号	116 页码:1–13
关键词	SENSITIVITY-ANALYSIS CARBON DYNAMICS AQUATIC ECOSYSTEMS RAINFALL EVENTS OXIDE EVOLUTION SCALE SWAT UNCERTAINTY PHOSPHORUS DRIVEN
ISSN号	0148-0227
通讯作者	Deng, J
英文摘要	Degradation of water quality has been widely observed in China, and loadings of nitrogen (N) and other nutrients from agricultural systems play a key role in the water contamination. Process-based biogeochemical models have been applied to quantify nutrient loading from nonpoint sources at the watershed scale. However, this effort is often hindered by the fact that few existing biogeochemical models of nutrient cycling are able to simulate the two-dimensional soil hydrology. To overcome this challenge, we launched a new attempt to incorporate two fundamental hydrologic features, the Soil Conservation Service curve and the Modified Universal Soil Loss Equation functions, into a biogeochemistry model, Denitrification-Decomposition (DNDC). These two features have been widely utilized to quantify surface runoff and soil erosion in a suite of hydrologic models. We incorporated these features in the DNDC model to allow the biogeochemical and hydrologic processes to exchange data at a daily time step. By including the new features, DNDC gained the additional ability to simulate both horizontal and vertical movements of water and nutrients. The revised DNDC was tested against data sets observed in a small watershed dominated by farmlands in a mountainous area of southwest China. The modeled surface runoff flow, subsurface drainage flow, sediment yield, and N loading were in agreement with observations. To further observe the behaviors of the new model, we conducted a sensitivity test with varied climate, soil, and management conditions. The results indicated that precipitation was the most sensitive factor determining the rate of N loading from the tested site. A Monte Carlo test was conducted to quantify the potential uncertainty derived by variations in four selected input parameters. This study demonstrates that it is feasible and effective to use enhanced biogeochemical models such as DNDC for quantifying N loadings by incorporating basic hydrological features into the model framework.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Environmental Sciences ; Geosciences, Multidisciplinary
研究领域[WOS]	Environmental Sciences & Ecology ; Geology
关键词[WOS]	SENSITIVITY-ANALYSIS ; CARBON DYNAMICS ; AQUATIC ECOSYSTEMS ; RAINFALL EVENTS ; OXIDE EVOLUTION ; SCALE ; SWAT ; UNCERTAINTY ; PHOSPHORUS ; DRIVEN
收录类别	SCI
语种	英语
WOS记录号	WOS:000291313600001
公开日期	2013-06-25
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/5507]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Univ New Hampshire, Inst Study Earth Oceans & Space, Complex Syst Res Ctr, Durham, NH 03824 USA 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Deng, Jia,Zhu, Bo,Zhou, Zaixing,et al. Modeling nitrogen loadings from agricultural soils in southwest China with modified DNDC[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2011,116:1–13.
APA	Deng, Jia.,Zhu, Bo.,Zhou, Zaixing.,Zheng, Xunhua.,Li, Changsheng.,...&Tang, Jialiang.(2011).Modeling nitrogen loadings from agricultural soils in southwest China with modified DNDC.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,116,1–13.
MLA	Deng, Jia,et al."Modeling nitrogen loadings from agricultural soils in southwest China with modified DNDC".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 116(2011):1–13.