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[1]Yu Yaochuang,Yang Shuyao,Wang Changyan,et al.Water Infiltration and Influencing Factors of L1-S5 Loess-Paleosol in Baoji Region[J].Research of Soil and Water Conservation,2023,30(06):78-85.[doi:10.13869/j.cnki.rswc.2023.06.010]

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Water Infiltration and Influencing Factors of L₁-S₅ Loess-Paleosol in Baoji Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 06 Page number: 78-85 Column: Public date: 2023-10-10

Title:: Water Infiltration and Influencing Factors of L₁-S₅ Loess-Paleosol in Baoji Region

Author(s):: Yu Yaochuang^1,2,3, Yang Shuyao^1,3, Wang Changyan^1,3, Gong Lanlan^1,3, Zhao Jingbo², Ren Yuanyuan^1,3, Xu Qiuyue^1,3, Hou Ying^1,3; (1.College of Geography and Environment, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, China; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; 3.Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, China)

Keywords:: soil infiltration; loess and paleosol; paleo climatic change; middle and late Pleistocene series; Baoji Region

CLC:: S152.7; P641

DOI:: 10.13869/j.cnki.rswc.2023.06.010

Abstract:: [Objective] In order to provide a reference for revealing the infiltration law of the L₁—S₅ layers of the Baoji loess-paleosol profiles in the middle and late Pleistocene, the variation characteristics of water stable infiltration rate of L₁—S₅ loess and paleosol in Baoji Middle Late Pleistocene Series and its relationship with soil properties such as soil bulk density, initial soil water content and soil capillary porosity are explored. [Methods] The characteristics and its influencing factors of stable infiltration rate of loess and paleosol in the middle and late Pleistocene of Baoji were studied by double ring method. [Results](1)The average stable infiltration rate(2.38 mm/min)of the loess is higher than that of the paleosol(1.55 mm/min)in the middle and late Pleistocene of the L₁—S₅ layers of the Baoji loess-paleosol profile, which may be related to the climate change at the time of formation and the strength of the weathering soil.(2)The infiltration experiment of loess and paleosol can be well fitted by using Kosgakov and general empirical formulas in the L₁—S₅ layers of the Baoji loess-paleosol profile in the middle and late Pleistocene.(3)Soil properties, such as soil bulk density, initial soil water content, saturated soil water content and so on are important factors affecting the stable infiltration rate of loess and paleosol in the L₁—S₅ layers of the middle and late Pleistocene of Baoji.(4)The soil stable infiltration rate(R²=0.88, NSE=0.88)of loess and paleosol in the L₁—S₅ layers of the Baoji loess-paleosol profile in the middle and late Pleistocene can be well simulated by using such parameters as soil bulk density, soil capillary porosity, maximum capillary water capacity, total soil porosity, soil saturated water content and soil initial water content. [Conclusion] The changes of stable water infiltration rate of loess and paleosol are mainly caused by the changes of soil bulk density, initial soil water content and capillary porosity. These soil parameters can be used to simulate the changes of stable water infiltration rate of L₁—S₅ loess and paleosol in the Middle Late Pleistocene in Baoji.

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Last Update: 2023-10-10