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Analysis on hydraulic characteristics of improved sandy soil with soft rock


Autoři: Yike Wang aff001;  Lei Ge aff001;  Shi Chendi aff001;  Huanyuan Wang aff001;  Jichang Han aff001;  Zhen Guo aff001;  Yangjie Lu aff001
Působiště autorů: Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Shaanxi, Xi’an, China aff001;  Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources of China, Shaanxi, Xi’an, China aff002;  Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Shaanxi, Xi’an, China aff003;  Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, China aff004
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0227957

Souhrn

Hydraulic properties of sandy soil from the Mu Us sandy land of Shaanxi Province were analyzed by using SEM technology. Soil porosity, the water characteristic curve, and unsaturated hydraulic conductivity of aeolian sandy soil with added soft rock were analyzed, and fractal characteristics were established. Soil hydraulic properties revealed the effect of soft rock application on soil structure and hydraulic properties. Mass ratios of soft rock to aeolian sand were 1:5, 1:2, and 1:1. Results showed that the addition of soft rock can significantly increase the bulk density of sandy soil and reduce the total porosity and macroporosity. The mass fraction of water-stable aggregates greater than 0.25mm increases significantly, increasing the fractal dimension of soil pores; reducing the soil saturated water content and saturated hydraulic conductivity. SEM technology and pore fractal theory were used to predict the soil salinity curve and unsaturated hydraulic conductivity of the improved saline soil.

Klíčová slova:

Agricultural soil science – Curve fitting – Distribution curves – Fractals – Porosity – Scanning electron microscopy – Soil chemistry – Surface theory


Zdroje

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