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	Integrated water system simulation by considering hydrological and biogeochemical processes: model development, with parameter sensitivity and autocalibration
	Zhang Y. Y.; Shao, Q. X.; Ye, A. Z.; Xing, H. T.; Xia, J.
	2016
关键词	forecasting uncertainty assessment glue methodology assessment-tool quality model soil nitrogen predictions catchment transport surface
英文摘要	Integrated water system modeling is a feasible approach to understanding severe water crises in the world and promoting the implementation of integrated river basin management. In this study, a classic hydrological model (the time variant gain model: TVGM) was extended to an integrated water system model by coupling multiple water-related processes in hydrology, biogeochemistry, water quality, and ecology, and considering the interference of human activities. A parameter analysis tool, which included sensitivity analysis, autocalibration and model performance evaluation, was developed to improve modeling efficiency. To demonstrate the model performances, the Shaying River catchment, which is the largest highly regulated and heavily polluted tributary of the Huai River basin in China, was selected as the case study area. The model performances were evaluated on the key water-related components including runoff, water quality, diffuse pollution load (or nonpoint sources) and crop yield. Results showed that our proposed model simulated most components reasonably well. The simulated daily runoff at most regulated and less-regulated stations matched well with the observations. The average correlation coefficient and Nash-Sutcliffe efficiency were 0.85 and 0.70, respectively. Both the simulated low and high flows at most stations were improved when the dam regulation was considered. The daily ammonium-nitrogen (NH4-N) concentration was also well captured with the average correlation coefficient of 0.67. Furthermore, the diffuse source load of NH4-N and the corn yield were reasonably simulated at the administrative region scale. This integrated water system model is expected to improve the simulation performances with extension to more model functionalities, and to provide a scientific basis for the implementation in integrated river basin managements.
出处	Hydrology and Earth System Sciences
卷	20
期	1
页	529-553
收录类别	SCI
语种	英语
ISSN号	1027-5606
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43919]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Zhang Y. Y.,Shao, Q. X.,Ye, A. Z.,et al. Integrated water system simulation by considering hydrological and biogeochemical processes: model development, with parameter sensitivity and autocalibration. 2016.

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