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[1]LI Chunmao,XU Qinxue,WU Pan,et al.Simulation Analysis on Soil Infiltration Under Different Land Use in Karst Hillsides[J].Research of Soil and Water Conservation,2019,26(01):47-52,60.

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Simulation Analysis on Soil Infiltration Under Different Land Use in Karst Hillsides

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 01 Page number: 47-52,60 Column: Public date: 2019-02-28

Title:: Simulation Analysis on Soil Infiltration Under Different Land Use in Karst Hillsides

Author(s):: LI Chunmao^1,2, XU Qinxue^1,2, WU Pan^1,2, WEI Weilai¹; 1. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, Guanxi 541004, China;
2. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technololyg, Guilin University of Technology, Guilin, Guanxi 541004, China

Keywords:: one-dimensional vertical infiltration; land use; infiltration characteristics; simulation fitting; Karst hill-slopes

CLC:: S152.7

DOI:: -

Abstract:: The basic research on water and soil processes in the karst peaks hillsides is relatively short, which hinders the understanding of relevant soil hydrological mechanisms and the construction of suitable models. In order to determine the soil infiltration performance and the process of variation on the karst hillsides, and to evaluate the fitting of several common infiltration models on infiltration process, the soil infiltration process and performance under different land use patterns on the karst hillsides were explored by one-dimensional vertical infiltration experiment, and evaluated by different infiltration models such as Horton,Philip,Kostiakov and others. The results showed that:(1) the sand contents were more than 50% in shrub woodlands, thus exhibited higher soil permeability than the other land use patterns; while terraced fields had higher clay content and lower organic matter content, and soil permeability was poorer in these fields; (2) the early infiltration rates of different land uses were higher, and ranged between 1.33 cm/min and 3.17 cm/min, then the infiltration rate decreased by the range from 82.2% to 96.2%, and reached to the steady infiltration rate in about 20 min; in particular, the decline rate of pre-infiltration rate of shrub woodland was the most significant, while that of bare rock gravel and terrace was relatively slow; (3) the Horton model was more suitable for describing soil infiltration process in karst hillsides, and the simulated initial infiltration rate and steady infiltration rate were close to the measured values, while the values fitted by the Kostiakov and Philip models were not very close to the measured values. The research provides the theoretical basis for further study of soil moisture movement and establish the infiltration model in karst hillsides.

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