气候变化领域集成服务门户(CCPortal): The spatial heterogeneity of riverbed saturated permeability coefficient in the lower reaches of the Heihe River Basin, Northwest China

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DOI	10.1002/hyp.10544
	The spatial heterogeneity of riverbed saturated permeability coefficient in the lower reaches of the Heihe River Basin, Northwest China
	Xi, Haiyang; Zhang, Lu; Feng, Qi; Si, Jianhua; Chang, Zongqiang; Yu, Tengfei; Li, Jianguo
发表日期	2015
ISSN	0885-6087
EISSN	1099-1085
卷号	29 期号:23
英文摘要	In arid region, direct infiltration from rainfall contributes little to groundwater compared with localized recharge from streams. How to quantify riverbed infiltration to groundwater systems is an important area of research in hydrology. In this study, saturated permeability coefficient of a riverbed in an arid inland river basin located in the northwest of China was obtained by Guelph Permeameter and laboratory analysis methods. The characteristics of riverbed infiltration and its spatial patterns were analysed using geostatistical method and kriging method. The results showed that the saturated permeability coefficient varied from 0.089 to 2.802m/d, indicating moderate degree of variability. The Guelph Permeameter and laboratory test methods provided consistent estimates of saturated permeability coefficient. There was a strong spatial correlation for K-fs of the riverbed in this study area when Range (A) was less than 0.276 degrees, suggesting that the maximum sampling distance for saturated permeability coefficient of the riverbed was 0.276 degrees under isotropic conditions. The K-fs near the centre of the riverbed was higher than the value near riverbank. The K-fs values decreased in the direction of upstream to downstream in the Heihe River Basin. The riverbed mechanical composition, initial soil water content and bulk density have significant influence up on the riverbed infiltration. Besides, the topographical factors including the width, altitude and distance factors of the riverbed together impacted the riverbed infiltration and the slope of the riverbed and also influenced the riverbed infiltration. Copyright (c) 2015 John Wiley & Sons, Ltd.
关键词	saturated permeability coefficient riverbed infiltration spatial heterogeneity infiltration loss
学科领域	Water Resources
语种	英语
WOS研究方向	Water Resources
来源期刊	HYDROLOGICAL PROCESSES
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/111792
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Ecohydrol & Integrated River Basin Sci, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Xi, Haiyang,Zhang, Lu,Feng, Qi,et al. The spatial heterogeneity of riverbed saturated permeability coefficient in the lower reaches of the Heihe River Basin, Northwest China[J]. 中国科学院西北生态环境资源研究院,2015,29(23).
APA	Xi, Haiyang.,Zhang, Lu.,Feng, Qi.,Si, Jianhua.,Chang, Zongqiang.,...&Li, Jianguo.(2015).The spatial heterogeneity of riverbed saturated permeability coefficient in the lower reaches of the Heihe River Basin, Northwest China.HYDROLOGICAL PROCESSES,29(23).
MLA	Xi, Haiyang,et al."The spatial heterogeneity of riverbed saturated permeability coefficient in the lower reaches of the Heihe River Basin, Northwest China".HYDROLOGICAL PROCESSES 29.23(2015).