气候变化领域集成服务门户(CCPortal): Estimation of the quantity of aeolian saltation sediments blown into the Yellow River from the Ulanbuh Desert, China

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DOI	10.1007/s40333-013-0198-3
	Estimation of the quantity of aeolian saltation sediments blown into the Yellow River from the Ulanbuh Desert, China
	Du, HeQiang; Xue, Xian; Wang, Tao
发表日期	2014
ISSN	1674-6767
EISSN	2194-7783
卷号	6 期号:2
英文摘要	The Ulanbuh Desert borders the upper reach of the Yellow River. Every year, a mass of aeolian sand is blown into the Yellow River by the prevailing wind and the coarse aeolian sand results in serious silting in the Yellow River. To estimate the quantity of aeolian sediments from the Ulanbuh Desert blown into the Yellow River, we simulated the saltation processes of aeolian sediments in the Ulanbuh Desert. Then we used a saltation submodel of the IWEMS (Integrated Wind-Erosion Modeling System) and its accompanying RS (Remote Sensing) and GIS (Geographic Information System) modules to estimate the quantity of saltation sediments blown into the Yellow River from the Ulanbuh Desert. We calibrated the saltation submodel by the synchronous observation to wind velocity and saltation sediments on several points with different vegetation cover. The vegetation cover, frontal area of vegetation, roughness length, and threshold friction velocity in various regions of the Ulanbuh Desert were obtained using NDVI (Normalized Difference Vegetation Index) data, measured sand-particle sizes, and empirical relationships among vegetation cover, sand-particle diameters, and wind velocity. Using these variables along with the observed wind velocities and saltation sediments for the observed points, the saltation model was validated. The model results were shown to be satisfactory (RMSE less than 0.05 and \|R-e\| less than 17%). In this study, a subdaily wind-velocity program, WINDGEN, was developed using this model to simulate hourly wind velocities around the Ulanbuh Desert. By incorporating simulated hourly wind-velocity and wind-direction data, the quantity of saltation sediments blown into the Yellow River was calculated with the saltation submodel. The annual quantity of aeolian sediments blown into the Yellow River from the Ulanbuh Desert was 5.56x10(6) t from 2001 to 2010, most of which occurred in spring (from March to May); for example, 6.54x10(5) tons of aeolian sand were blown into the Yellow River on 25 April, 2010. However, in summer and winter, the saltation process occasionally occurred. This research has supplied some references to prevent blown sand hazards and silting in the Yellow River.
关键词	aeolian sand sediments integrated wind-erosion modeling system NDVI WINDGEN Ulanbuh Desert
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	JOURNAL OF ARID LAND
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111734
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Du, HeQiang,Xue, Xian,Wang, Tao. Estimation of the quantity of aeolian saltation sediments blown into the Yellow River from the Ulanbuh Desert, China[J]. 中国科学院西北生态环境资源研究院,2014,6(2).
APA	Du, HeQiang,Xue, Xian,&Wang, Tao.(2014).Estimation of the quantity of aeolian saltation sediments blown into the Yellow River from the Ulanbuh Desert, China.JOURNAL OF ARID LAND,6(2).
MLA	Du, HeQiang,et al."Estimation of the quantity of aeolian saltation sediments blown into the Yellow River from the Ulanbuh Desert, China".JOURNAL OF ARID LAND 6.2(2014).