A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using Cs-137 technique in the Rolling Loess Plateau, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using Cs-137 technique in the Rolling Loess Plateau, China
	Feng, MY 1,4; Walling, DE 3; Zhang, XB1,2 ; Wen, AB1
刊名	CHINESE SCIENCE BULLETIN
	2003-10-01
卷号	48 期号:19 页码:2093-2100
关键词	Loess Plateau closing cultivation gully ara inter-gully area relative sediment contribution Cs-137
ISSN号	1001-6538
通讯作者	Feng, MY
英文摘要	By comparison of volumes and Cs-137 contents of the deposited sediments before and after 1993, changes of specific sediment yields and relative sediment contributions from the gully area and from the inter gully area after closing cultivation on the later area on a small catchment of Zhaojia Gully, in the Rolling Loess Plateau, are analyzed in this paper. Closing cultivation in a large scale has not resulted in decrease but increase of specific sediment yield of the catchment, in sharp decrease of the sediment yield and the relative sediment contribution of the inter-gully area, and in increase of the sediment yield and the contribution of the gully area, for a short term. The mean specific sediment yield of 29650 t km(-2) a(-1) of 1994-1996 in the catchment was 2.2 times the average value of 13413 1 km(-2) a(-1) for a long term. The specific sediment yield of the inter-gully area decreased from the 14335 t km(-2) a(-1) in 1994 to 7034 t km(-2) a(-1) in 1995 and 3517 t km(-2) a(-1) in 1996, while the yield of the gully area varied between 44944 and 62136 t km(-2) a(-1) during the period of 1994-1996 which was much greater than the value of 21118 t km(-2) a(-1) before 1993. The relative sediment contribution from the inter-gully area decreased from 23% in 1994 to 15% in 1995 and 6% in 1996, while the contribution from the gully area increased from 77% in 1994 to 85% in 1995 and 94% in 1996. It is suggested that compacting of ploughed soils resulted in increasing of the erosion resistance but in decreasing of the precipitation infiltration, therefore, the soil erosion reduced but the runoff amount increased on the inter-gully area. Increase of delivering runoff from the inter-gully area to the gully area should result in activeness of gully erosion and mass movements, consequently in increase of the total sediment yield from the catchment.
学科主题	S157
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	SMALL DRAINAGE-BASIN ; CESIUM-137 MEASUREMENTS ; INVESTIGATE
收录类别	SCI
语种	英语
WOS记录号	WOS:000186305300014
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/10597]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室科技与合作处
作者单位	1.Chinese Acad Sci, Chengdu Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.CAS, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Univ Exeter, Dept Geog & Archaeol, Exeter EX4 4RJ, Devon, England 4.Sichuan Teachers Coll, Nanchong 637002, Peoples R China
推荐引用方式 GB/T 7714	Feng, MY,Walling, DE,Zhang, XB,et al. A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using Cs-137 technique in the Rolling Loess Plateau, China[J]. CHINESE SCIENCE BULLETIN,2003,48(19):2093-2100.
APA	Feng, MY,Walling, DE,Zhang, XB,&Wen, AB.(2003).A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using Cs-137 technique in the Rolling Loess Plateau, China.CHINESE SCIENCE BULLETIN,48(19),2093-2100.
MLA	Feng, MY,et al."A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using Cs-137 technique in the Rolling Loess Plateau, China".CHINESE SCIENCE BULLETIN 48.19(2003):2093-2100.