气候变化领域集成服务门户(CCPortal): Evaluation of Hydraulic Parameters Obtained by Different Measurement Methods for Heterogeneous Gravel Soil

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DOI	10.3319/TAO.2012.05.22.03(WMH)
	Evaluation of Hydraulic Parameters Obtained by Different Measurement Methods for Heterogeneous Gravel Soil
	Zeng, Chen; Wang, Quanjiu; Zhang, Fan
通讯作者	Wang, QJ (通讯作者)
发表日期	2012
ISSN	1017-0839
起始页码	585
结束页码	596
卷号	23 期号:5
英文摘要	Knowledge of soil hydraulic parameters for the van Genuchten function is important to characterize soil water movement for watershed management. Accurate and rapid prediction of soil water flow in heterogeneous gravel soil has become a hot topic in recent years. However, it is difficult to precisely estimate hydraulic parameters in a heterogeneous soil with rock fragments. In this study, the HYDRUS-2D numerical model was used to evaluate hydraulic parameters for heterogeneous gravel soil that was irregularly embedded with rock fragments in a grape production base. The centrifugal method (CM), tensiometer method (TM) and inverse solution method (ISM) were compared for various parameters in the van Genuchten function. The soil core method (SCM), disc infiltration method (DIM) and inverse solution method (ISM) were also investigated for measuring saturated hydraulic conductivity. Simulation with the DIM approach revealed a problem of overestimating soil water infiltration whereas simulation with the SCM approach revealed a problem of underestimating water movement as compared to actual field observation. The ISM approach produced the best simulation result even though this approach slightly overestimated soil moisture by ignoring the impact of rock fragments. This study provides useful information on the overall evaluation of soil hydraulic parameters attained with different measurement methods for simulating soil water movement and distribution in heterogeneous gravel soil.
关键词	SUBSURFACE DRIP IRRIGATION DETECT TEMPORAL-CHANGES STONY SOILS TENSION INFILTROMETER UNSATURATED SOILS FOREST SOILS BULK-DENSITY CLAY SOILS CONDUCTIVITY SURFACE
英文关键词	Soil hydraulic parameter; van Genuchten function; Model inverse solution; HYDRUS 2D
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Oceanography
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Oceanography
WOS记录号	WOS:000310422000011
来源期刊	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258021
推荐引用方式 GB/T 7714	Zeng, Chen,Wang, Quanjiu,Zhang, Fan. Evaluation of Hydraulic Parameters Obtained by Different Measurement Methods for Heterogeneous Gravel Soil[J]. 中国科学院青藏高原研究所,2012,23(5).
APA	Zeng, Chen,Wang, Quanjiu,&Zhang, Fan.(2012).Evaluation of Hydraulic Parameters Obtained by Different Measurement Methods for Heterogeneous Gravel Soil.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,23(5).
MLA	Zeng, Chen,et al."Evaluation of Hydraulic Parameters Obtained by Different Measurement Methods for Heterogeneous Gravel Soil".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 23.5(2012).