Simulating infiltration into stony soils with a dual-porosity model

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所知识产出(1956-2013)

	Simulating infiltration into stony soils with a dual-porosity model
	Ma, DH (Ma, Donghao)3,4 ; Shao, MG (Shao, Mingan)1,2
刊名	EUROPEAN JOURNAL OF SOIL SCIENCE
	2008
卷号	59 期号:5 页码:950-959
关键词	WATER-HOLDING CHARACTERISTICS HYDRAULIC CONDUCTIVITY ROCK FRAGMENTS POROUS-MEDIA FOREST ECOSYSTEMS NITROGEN BALANCES COARSE FRAGMENTS GENERIC MODEL FLOW TRANSPORT
通讯作者	Shao, MG
英文摘要	Soils containing rock fragments are widely distributed in the world. However, literature on the dynamic simulation of water movement in stony soils is scarce. In this paper, a dual-porosity model was used to simulate water infiltration into soils containing rock fragments. Sensitivity analysis of the dual-porosity model parameters demonstrates that the increase of rock fragment content clearly decreased infiltration into stony soils. Big stones hampered infiltration more than small stones. Spherical stones accelerated infiltration compared with solid, cylindrical stones and rectangular, slab-like stones. Numerical analysis was also performed to test and compare a non-equilibrium dual-porosity model (NDPM) with an equilibrium dual-porosity model (EDPM) and an equilibrium single-pore model (ESPM). Infiltration experiments on disturbed soils were carried out to verify the ability of the NDPM to simulate infiltration into stony soils. Based on hydraulic parameters of soils without rock fragments and mass transfer coefficients obtained independently, the extrapolated cumulative infiltrations calculated by the NDPM were in good agreement with the observed data. Fitted model parameters of the NDPM indicate that rock fragments not only act as a source or sink to affect infiltration but also change the pore structure of the fine earth, apart from reducing the cross-sectional area for water flow. Though further studies are required to improve the dual-porosity model, it already describes more characteristics of infiltration into stony soils and explains more phenomena than does the single-porosity model.
收录类别	SCI
语种	英语
公开日期	2012-06-14
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/4843]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	Ma, DH ,Shao, MG . Simulating infiltration into stony soils with a dual-porosity model[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2008,59(5):950-959.
APA	Ma, DH ,&Shao, MG .(2008).Simulating infiltration into stony soils with a dual-porosity model.EUROPEAN JOURNAL OF SOIL SCIENCE,59(5),950-959.
MLA	Ma, DH ,et al."Simulating infiltration into stony soils with a dual-porosity model".EUROPEAN JOURNAL OF SOIL SCIENCE 59.5(2008):950-959.