Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study
Choosing reasonable design parameters for ceramic emitters used in subsurface irrigation is important for reducing the deep percolation of water and improving the water use efficiency. Laboratory experiments and numerical simulations with the HYDRUS-2D software were carried out to analyze the effect...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Water |
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| Online Access: | http://www.mdpi.com/2073-4441/11/1/22 |
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| author | Yaohui Cai Xiao Zhao Pute Wu Lin Zhang Delan Zhu Junying Chen |
| author_facet | Yaohui Cai Xiao Zhao Pute Wu Lin Zhang Delan Zhu Junying Chen |
| author_sort | Yaohui Cai |
| collection | DOAJ |
| description | Choosing reasonable design parameters for ceramic emitters used in subsurface irrigation is important for reducing the deep percolation of water and improving the water use efficiency. Laboratory experiments and numerical simulations with the HYDRUS-2D software were carried out to analyze the effect of soil texture on the infiltration characteristics of porous ceramic emitters used for subsurface irrigation. HYDRUS-2D predictions of emitter discharge in soil and wetting front are in agreement with experimental results, and the HYDRUS-2D model can be used to accurately simulate soil water movement during subsurface irrigation with ceramic emitters in different soil textures. Results show that soil texture has a significant effect on emitter discharge, soil matrix potential around the emitter, and wetting front. For 12 different soil textures, the aspect ratio of the wetting front is basically between 0.84–1.49. In sandy soil, the wetting front mainly appears as an ellipse; but in the clay, the wetting front is closer to a circle. As irrigation time increases, emitter discharge gradually decreases to a stable value; however, emitter discharge in different texture soils is quite different. In order to improve the crop water use efficiency in sandy soil, soil water retention can be improved by adding a clay interlayer or adding water retention agent, reducing the risk of deep percolation and improving the water use efficiency. |
| first_indexed | 2024-04-13T01:04:27Z |
| format | Article |
| id | doaj.art-946540dee8b44d3196e85778d0fe816c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-04-13T01:04:27Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-946540dee8b44d3196e85778d0fe816c2022-12-22T03:09:23ZengMDPI AGWater2073-44412018-12-011112210.3390/w11010022w11010022Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation StudyYaohui Cai0Xiao Zhao1Pute Wu2Lin Zhang3Delan Zhu4Junying Chen5Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaInstitute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaChoosing reasonable design parameters for ceramic emitters used in subsurface irrigation is important for reducing the deep percolation of water and improving the water use efficiency. Laboratory experiments and numerical simulations with the HYDRUS-2D software were carried out to analyze the effect of soil texture on the infiltration characteristics of porous ceramic emitters used for subsurface irrigation. HYDRUS-2D predictions of emitter discharge in soil and wetting front are in agreement with experimental results, and the HYDRUS-2D model can be used to accurately simulate soil water movement during subsurface irrigation with ceramic emitters in different soil textures. Results show that soil texture has a significant effect on emitter discharge, soil matrix potential around the emitter, and wetting front. For 12 different soil textures, the aspect ratio of the wetting front is basically between 0.84–1.49. In sandy soil, the wetting front mainly appears as an ellipse; but in the clay, the wetting front is closer to a circle. As irrigation time increases, emitter discharge gradually decreases to a stable value; however, emitter discharge in different texture soils is quite different. In order to improve the crop water use efficiency in sandy soil, soil water retention can be improved by adding a clay interlayer or adding water retention agent, reducing the risk of deep percolation and improving the water use efficiency.http://www.mdpi.com/2073-4441/11/1/22ceramic emitterHYDRUSsandy soilinfiltrationdischarge |
| spellingShingle | Yaohui Cai Xiao Zhao Pute Wu Lin Zhang Delan Zhu Junying Chen Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study Water ceramic emitter HYDRUS sandy soil infiltration discharge |
| title | Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study |
| title_full | Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study |
| title_fullStr | Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study |
| title_full_unstemmed | Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study |
| title_short | Effect of Soil Texture on Water Movement of Porous Ceramic Emitters: A Simulation Study |
| title_sort | effect of soil texture on water movement of porous ceramic emitters a simulation study |
| topic | ceramic emitter HYDRUS sandy soil infiltration discharge |
| url | http://www.mdpi.com/2073-4441/11/1/22 |
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