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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Analysis of runoff responses to land use changes based on swat model inchaohe watershed of miyun res...
Analysis of runoff responses to land use changes based on swat model inchaohe watershed of miyun reservoir, north china
As a main tributary of Miyun Reservoir, the most important surface water source in Beijing city, the Chaohe River has
been witnessed significant streamflow variations over past five decades. Land use had an important impact on runoff
variations. In this paper, the SWAT model was applied to estimate the seasonal average runoff and its dynamic
variations in Chaohe watershed under different land use scenarios. The contributions of land use changes were analyzed
to clarify the runoff responses to this main influence factors. The results showed the following: (1)the shrub land,
grassland, farmland and woodland were the main land use types in the research area. The watershed witnessed runoff
reduction due to land use changes. And contributions of land use changes had not apparent relief with the trend of the
time series; (2)the runoff reduction was the results of the woodland and farmland area growth, especially the substantial
woodland increase; (3) the shrub land and the grassland would increase the runoff, the former provided greater help
which increased about 1.58 times of the original runoff; contrarily, the farmland (41.7%) could lessen the runoff more
obviously than the woodland (23.7%). It is critical to develop adaptive land use assignment to insure the balance of soil
and water conservation and runoff generation in the ecological system. The understanding of the various runoff
responses could provide the comprehensive water resource management for the government with theoretical foundation
under different scenarios of land use changes
File Size : 385,002 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 19/08/2015
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