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	Effect of reforestation on nitrogen and phosphorus dynamics in the catchment ecosystems of subtropical China: the example of the Hanjiang River basin
	Liu C.
	2012
关键词	nitrogen and phosphorus catchment ecosystems of subtropical China Reforestation of Cultivated Land (RFCL) Hanjiang River model application changjiang river yangtze-river swat model land-use agroecosystems validation management watersheds impacts
英文摘要	BACKGROUND: To enable effective management and decision making for the sustainable use of water resources, we successfully integrated factors such as dams, land use and soil properties as well as management factors in the Hanjiang River basin, a subtropical catchment of China, into the SWAT model to simulate water cycles as well as the distribution, movement, and transformations of nutrients. RESULTS: The accuracy of the model was validated by monitoring data over the Hanjiang River. The validated model was then used to evaluate the effects of the Reforestation of Cultivated Land (RFCL) initiative. The simulation results showed that RFCL would cause an obvious decrease in surface runoff (-23.6%, P < 0.01) but an increase in groundwater (71.8%, P < 0.01) and percolation out of the soil (24.7%, P < 0.01). The total water yield does not change significantly (-4.4%), but the decrease in total sediment loading is substantial (-56.2%, P < 0.01). The simulation results also show that RFCL would greatly decrease the organic N (-42.6%, P < 0.01), NO3 yield in surface flow (-37.1%, P < 0.01), and the NO3 yield in subsurface flow (-25.5%, P < 0.01), whereas the NO3 yield in groundwater flow would increase (107%, P < 0.01). In terms of phosphorus, RFCL would cause both organic phosphorus (-38.2%, P < 0.01) and the phosphorus yield from the soil (-33.3%, P < 0.01) to decrease. CONCLUSION: The results suggest that RFCL is an effective policy for watershed environment management, which might have a relatively small effect on river discharge but that the purification effects on water quality in the river would be remarkable. (C) 2011 Society of Chemical Industry
出处	Journal of the Science of Food and Agriculture
卷	92
期	5
页	1119-1129
收录类别	SCI
ISSN号	0022-5142
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/26772]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liu C.. Effect of reforestation on nitrogen and phosphorus dynamics in the catchment ecosystems of subtropical China: the example of the Hanjiang River basin. 2012.

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