Development of Soil and Water Assessment Tool Model on Human Water Use and Application in the Area of High Human Activities, Tianjin, China
Publication: Journal of Irrigation and Drainage Engineering
Volume 136, Issue 1
Abstract
The basin water cycle affected by human activities presents the duality of natural and human characteristics. The effect of human activities to hydrology is becoming point of focus in the world with the development of society. As a physically based distributed parameter model, soil and water assessment tool is deficient when applied to the area with more human activities. In areas of increased activities, monthly changes in irrigation and consumptive water use has been observed over the years. In the past, this module was applied to a system with very little human influence. In this study we revised the theory and made appropriate improvement on irrigation module and consumptive water use module in order to apply it to the water system in Tianjin City, China, where water cycle is strongly affected by the human activities. The watershed model has been calibrated and validated using measured data available for the main river. By comparing the simulation results between initial model and improved model, the Nash-Sutcliffe efficiency is adjusted from 0.62 to 0.89 and correlation coefficient is improved from 0.79 to 0.91. The resulting validated model improves the simulation precision, especially amends the peak value of runoff, and adequately describes the impact of consumptive water use and irrigation on the natural water cycle. The model developed in this paper can be used to study water resource and water environment management in area of high human activities.
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Acknowledgments
The research got financial supports from the project of the National 973 Program of China (Grant No. UNSPECIFIED2006CB403401), the National Scientific Foundation of China (NSFC) Project (Grant No. UNSPECIFIED50721006), and the Global Environment Fund (GEF) Project (Grant No. UNSPECIFIEDTJSHZ505). The writers acknowledge the help received from Prof. Yangwen Jia and study group of Tianjin Integrated Water and Environment Management Planning of China Institute of Water Resources and Hydropower Research. Thanks are extended to Tianjin Water Resources Bureau and Environment Protection Bureau or kind provision of fundamental data.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 136 • Issue 1 • January 2010
Pages: 23 - 30
Copyright
© 2010 ASCE.
History
Received: Sep 6, 2008
Accepted: Apr 30, 2009
Published online: May 2, 2009
Published in print: Jan 2010
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