Water, soil and nutrient losses caused by Wenchuan Earthquake: a case study in Pengzhou

	Water, soil and nutrient losses caused by Wenchuan Earthquake: a case study in Pengzhou
	Guo, Haixia ; Sun, Geng ; Shi, Fusun ; Lu, Tao ; Wang, Qian ; Wu, Yan ; Wu, Ning
刊名	WATER SCIENCE AND TECHNOLOGY
	2013
卷号	68 期号:5 页码:1055-1062
关键词	nutrients runoff sediment soil erosion Wenchuan Earthquake
ISSN号	0273-1223
通讯作者	Wu, N (reprint author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	Wenchuan Earthquake triggered a large number of geological hazards, dramatically stimulating soil erosion. This study was carried out in Pengzhou County, Sichuan Province. By comparison of sediment, runoff and nutrient losses in earthquake-damaged forests (EF) and unaffected forests (UF), the actual status of soil erosion after the Wenchuan Earthquake was investigated by runoff plots. Results showed that water and soil losses were dramatically increased after earthquake. During the study period (from August to November 2010), UF runoffs were 19.26, 36.76, 10.68 and 7.51 L m(-2), while total runoffs in EF sites were 30.41, 25.79, 5.03 and 2.67 L m(-2) respectively, which were 15, 15, 18 and 19 times more than those in UF. Total sediment losses in EF sites were 28.94, 25.16, 4.11 and 1.98 t km(-2) respectively while in UF they were 707.69, 610.05, 113.43 and 58.95 t km(-2) respectively during the same study period, i.e. 23, 23, 32 and 29 times more than those in UF. Path analysis showed that both vegetation and rainfall exerted an indirect influence on sediment loss by significantly influencing runoff, which correlated with sediment loss very significantly. Although no obvious differences of the nutrients' concentration in runoff water (soluble organic carbon (SOC), total nitrogen (TN), total phosphorus (TP) and total potassium (TK)) between EF and UF sites were observed, total losses of the four nutrients were significantly higher in EF than in UF sites (for example, in EF sites, SOC, TN, TP and TK losses were 970.52, 114.46, 2.26 and 307.00 g m(-2) respectively, while in UF they were 38.13, 4.22, 0.10 and 13.28 g m(-2)) due to significantly higher runoff in EF sites. In conclusion, soil erosion was significantly more serious due to the loss of forested lands resulting from the Wenchuan Earthquake, delaying the restoring process of forest cover and weakening the ecological linkage between upstream and downstream.
学科主题	Engineering; Environmental Sciences & Ecology; Water Resources
收录类别	SCI
语种	英语
WOS记录号	WOS:000324544800012
公开日期	2014-11-21
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/24249]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Guo, Haixia,Sun, Geng,Shi, Fusun,et al. Water, soil and nutrient losses caused by Wenchuan Earthquake: a case study in Pengzhou[J]. WATER SCIENCE AND TECHNOLOGY,2013,68(5):1055-1062.
APA	Guo, Haixia.,Sun, Geng.,Shi, Fusun.,Lu, Tao.,Wang, Qian.,...&Wu, Ning.(2013).Water, soil and nutrient losses caused by Wenchuan Earthquake: a case study in Pengzhou.WATER SCIENCE AND TECHNOLOGY,68(5),1055-1062.
MLA	Guo, Haixia,et al."Water, soil and nutrient losses caused by Wenchuan Earthquake: a case study in Pengzhou".WATER SCIENCE AND TECHNOLOGY 68.5(2013):1055-1062.