Quantification of 3D macropore networks in forest soils in Touzhai valley (Yunnan, China) using X-ray computed tomography and image analysis

doi:10.1007/s11629-016-4150-9

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 > Journal of Mountain Science > Journal of Mountain Science-2017 > Vol14 No.3

	Quantification of 3D macropore networks in forest soils in Touzhai valley (Yunnan, China) using X-ray computed tomography and image analysis
	ZHANG Jia-ming; XU Ze-min; LI Feng; HOU Ru-ji; REN Zhe
刊名	Journal of Mountain Science
	2017-03
卷号	14 期号:3 页码:474-491
关键词	Slope Stability Touzhai Valley Rainfall Infiltration Forest Soils X-ray Computed Tomography 3d Macropore Networks
ISSN号	1672-6316
DOI	10.1007/s11629-016-4150-9
通讯作者	XU Ze-min
文献子类	期刊论文
英文摘要	The three dimensional (3D) geometry of soil macropores largely controlspreferential flow, which is a significant infiltrating mechanism for rainfall in forest soils and affects slope stability. However, detailed studies on the 3D geometry of macropore networks in forest soils are rare.The intense rainfall-triggered potentially unstable slopes were threateningthe villages at the downstream of Touzhai valley (Yunnan, China). Wevisualizedand quantifiedthe 3D macropore networks in undisturbed soil columns (Histosols) taken from a forest hillslope in Touzhai valley, and compared them with those in agricultural soils (corn and soybean in USA; barley, fodder beet and red fescue in Denmark) and grassland soils in USA. We took two large undisturbed soil columns (250 mm×250 mm×500 mm), and scanned the soil columns at in-situ soil water content conditions using X-ray computed tomography at a voxel resolution of 0.945 × 0.945 × 1.500 mm3. After reconstruction and visualization, we quantiﬁedthe characteristics of macropore networks. In the studied forest soils, the main types of macropores were root channels, inter-aggregate voids, macropores without knowing origin, root-soil interface and stone-soil interface. Whilemacropore networks tend to be more complex, larger, deeper and longer. The forest soils have high macroporosity, total macropore wall area density, node density, and large macropore volume, hydraulic radius, mean macropore length, angle, and low tortuosity. The findings suggest that macropore networks in the forest soils have high inter-connectivity, vertical continuity, linearity and less vertically oriented.
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18435]
专题	Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.3
推荐引用方式 GB/T 7714	ZHANG Jia-ming,XU Ze-min,LI Feng,et al. Quantification of 3D macropore networks in forest soils in Touzhai valley (Yunnan, China) using X-ray computed tomography and image analysis[J]. Journal of Mountain Science,2017,14(3):474-491.
APA	ZHANG Jia-ming,XU Ze-min,LI Feng,HOU Ru-ji,&REN Zhe.(2017).Quantification of 3D macropore networks in forest soils in Touzhai valley (Yunnan, China) using X-ray computed tomography and image analysis.Journal of Mountain Science,14(3),474-491.
MLA	ZHANG Jia-ming,et al."Quantification of 3D macropore networks in forest soils in Touzhai valley (Yunnan, China) using X-ray computed tomography and image analysis".Journal of Mountain Science 14.3(2017):474-491.