Developing a non-point source P loss indicator in R and its parameter uncertainty assessment using GLUE a case study in northern China

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	Developing a non-point source P loss indicator in R and its parameter uncertainty assessment using GLUE a case study in northern China
	Su, Jingjun; Du, Xinzhong; Li, Xuyong
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2018-07-01
卷号	25 期号:21 页码:21070-21085
关键词	Non-point source P indicator Uncertainty analysis GLUE R Likelihood formulation Acceptability threshold
ISSN号	0944-1344
文献子类	Article
英文摘要	Uncertainty analysis is an important prerequisite for model application. However, the existing phosphorus (P) loss indexes or indicators were rarely evaluated. This study applied generalized likelihood uncertainty estimation (GLUE) method to assess the uncertainty of parameters and modeling outputs of a non-point source (NPS) P indicator constructed in R language. And the influences of subjective choices of likelihood formulation and acceptability threshold of GLUE on model outputs were also detected. The results indicated the following. (1) Parameters RegR (2), RegSDR (2), PlossDP (fer) , PlossDP (man) , DPDR, and DPR were highly sensitive to overall TP simulation and their value ranges could be reduced by GLUE. (2) Nash efficiency likelihood (L (1)) seemed to present better ability in accentuating high likelihood value simulations than the exponential function (L (2)) did. (3) The combined likelihood integrating the criteria of multiple outputs acted better than single likelihood in model uncertainty assessment in terms of reducing the uncertainty band widths and assuring the fitting goodness of whole model outputs. (4) A value of 0.55 appeared to be a modest choice of threshold value to balance the interests between high modeling efficiency and high bracketing efficiency. Results of this study could provide (1) an option to conduct NPS modeling under one single computer platform, (2) important references to the parameter setting for NPS model development in similar regions, (3) useful suggestions for the application of GLUE method in studies with different emphases according to research interests, and (4) important insights into the watershed P management in similar regions.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40729]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Su, Jingjun,Du, Xinzhong,Li, Xuyong. Developing a non-point source P loss indicator in R and its parameter uncertainty assessment using GLUE a case study in northern China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2018,25(21):21070-21085.
APA	Su, Jingjun,Du, Xinzhong,&Li, Xuyong.(2018).Developing a non-point source P loss indicator in R and its parameter uncertainty assessment using GLUE a case study in northern China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,25(21),21070-21085.
MLA	Su, Jingjun,et al."Developing a non-point source P loss indicator in R and its parameter uncertainty assessment using GLUE a case study in northern China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 25.21(2018):21070-21085.