[1]L Wencong,QIU Yang,XIE Zhongkui,et al.Effects of Mulch Gravels with Different Sizes on the Process of Water Infiltration[J].Research of Soil and Water Conservation,2021,28(06):46-51.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
46-51
Column:
Public date:
2021-10-10
- Title:
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Effects of Mulch Gravels with Different Sizes on the Process of Water Infiltration
- Author(s):
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LÜ Wencong1,2,QIU Yang1,XIE Zhongkui1,WANG Xinping1,WANG Yajun1
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(1.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730030,China; 2.Sino-Danish College,University of Chinese Academy of Sciences,Beijing 100049,China)
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- Keywords:
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gravel mulch; soil moisture; infiltration; cumulative infiltration
- CLC:
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S152.7
- DOI:
-
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- Abstract:
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In order to study the effect of mulch of gravels with different sizes on the soil infiltration process,an one-dimensional vertical constant head method was selected to conduct indoor soil column simulation experiments. The following five treatments were investigated: 8.28 mm,16.38 mm,26.36 mm,38.39 mm equivalent particle-sized gravel mulch and no gravel mulch as a control(CK). It was found that gravel mulch improved the soil water infiltration performance,and the migration depth and total infiltration of the wet front increased significantly. The total infiltration of 8.28 mm,16.38 mm,26.36 mm,38.39 mm particle-sized gravel mulching treatment increased by 0.08,0.11,0.18,and 0.25 times,respectively,and the total infiltration increased linearly with the increase of the particle-sized of the gravel. At the same time,gravel mulch changed the soil water infiltration rate. As the size of the gravel increased,the initial soil infiltration rate increased rapidly,but the stable infiltration rate increased slowly. The initial infiltration rates of the 8.28 mm,16.38 mm,26.36 mm,38.39 mm particle-sized gravel mulching treatments increased significantly by 0.6 times,1.01 times,1.33 times,and 1.81 times(p<0.05); the stable infiltration rates increased by 0.07 times,0.08 times,0.16 times,and 0.18 times,respectively. Compared with the Horton and Philip infiltration models,the Kostiakov model could better reflect the soil moisture infiltration process of mulchof gravels with different particle sizes. In general,gravel mulch can significantly improve soil infiltration,and large-sized gravel mulch has the best effect on soil moisture infiltration. Therefore,it is recommended to choose the large-sized gravel as an agricultural water conservation measure in arid and semi-arid areas.