globalchange  > 气候变化与战略
DOI: 10.5194/hess-22-4621-2018
论文题名:
Predicting the soil water retention curve from the particle size distribution based on a pore space geometry containing slit-shaped spaces
作者: Chang C.-C.; Cheng D.-H.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期:9
起始页码: 4621
结束页码: 4632
语种: 英语
Scopus关键词: Light transmission ; Particle size analysis ; Pore size ; Size distribution ; Soil moisture ; Physical parameters ; Pore diameters ; Pore models ; Pore volume fractions ; Soil water retention curves ; Suction head ; Traditional models ; Unsaturated soil ; Particle size ; estimation method ; geometry ; hydraulic property ; numerical model ; particle size ; prediction ; size distribution ; soil water ; water content ; water retention
英文摘要: Traditional models employed to predict the soil water retention curve (SWRC) from the particle size distribution (PSD) always underestimate the water content in the dry range of the SWRC. Using the measured physical parameters of 48 soil samples from the UNSODA unsaturated soil hydraulic property database, these errors were proven to originate from an inaccurate estimation of the pore size distribution. A method was therefore proposed to improve the estimation of the water content at high suction heads using a pore model comprising a circle-shaped central pore connected to slit-shaped spaces. In this model, the pore volume fraction of the minimum pore diameter range and the corresponding water content were accordingly increased. The predicted SWRCs using the improved method reasonably approximated the measured SWRCs, which were more accurate than those obtained using the traditional method and the scaling approach in the dry range of the SWRC. © 2018 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163208
Appears in Collections:气候变化与战略

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作者单位: Chang, C.-C., School of Environmental Sciences and Engineering, Chang'An University, Xi'an, 710054, China, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang'An University, Ministry of Education, Xi'an, China; Cheng, D.-H., School of Environmental Sciences and Engineering, Chang'An University, Xi'an, 710054, China, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang'An University, Ministry of Education, Xi'an, China

Recommended Citation:
Chang C.-C.,Cheng D.-H.. Predicting the soil water retention curve from the particle size distribution based on a pore space geometry containing slit-shaped spaces[J]. Hydrology and Earth System Sciences,2018-01-01,22(9)
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