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A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water

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  • Chen, Li-Juan
  • Feng, Qi
  • Li, Feng-Rui
  • Li, Chang-Sheng

Abstract

Here, we present a mathematical model for simulating both soil water flow and salt transport in two directions (perpendicular and parallel to the drip tubing) under mulched drip irrigation with saline water. We evaluated the effectiveness of this model by comparing the simulated values with observed data from the field experiment (one treatment with three replications was imposed with irrigation water electrical conductivity of 4.0dSm−1 and amounts of 2400m3ha−1 under mulched drip irrigation system). The results demonstrated that the model performed reliably in the simulation of water flow and salt transport under field conditions. In addition, the model was also used to simulate the spatial distribution patterns of soil water and salt in the two directions in relation to different treatments of irrigation quantity and quality. The simulation demonstrated that the volume of wetted soil was affected by both the plastic mulching and irrigation amount. The wetted region was expanded to the middle of the plastic mulching when the irrigation amount was high and the uniformity of irrigation increased with increasing irrigation volume. Soil water content in the direction parallel to the drip tubing was higher than that perpendicular to the tubing at the same distance, indicating that the wetting fronts overlapped more rapidly in the direction parallel to the drip tubing. The soil salt concentration was high at the edges of the wetting front, with a fairly large desalinated area immediately underneath and adjacent to the drippers. The model presented here offers an efficient approach to investigating the mechanisms underlying soil water flow and salt transport and for designing mulched drip irrigation systems with saline water.

Suggested Citation

  • Chen, Li-Juan & Feng, Qi & Li, Feng-Rui & Li, Chang-Sheng, 2014. "A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water," Agricultural Water Management, Elsevier, vol. 146(C), pages 24-33.
    • Handle: RePEc:eee:agiwat:v:146:y:2014:i:c:p:24-33
    DOI: 10.1016/j.agwat.2014.07.021
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    1. Amayreh, Jumah & Al-Abed, Nassim, 2005. "Developing crop coefficients for field-grown tomato (Lycopersicon esculentum Mill.) under drip irrigation with black plastic mulch," Agricultural Water Management, Elsevier, vol. 73(3), pages 247-254, May.
    2. Beltran, Julian Martinez, 1999. "Irrigation with saline water: benefits and environmental impact," Agricultural Water Management, Elsevier, vol. 40(2-3), pages 183-194, May.
    3. Patel, Neelam & Rajput, T.B.S., 2008. "Dynamics and modeling of soil water under subsurface drip irrigated onion," Agricultural Water Management, Elsevier, vol. 95(12), pages 1335-1349, December.
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    4. Zhang, You-Liang & Feng, Shao-Yuan & Wang, Feng-Xin & Binley, Andrew, 2018. "Simulation of soil water flow and heat transport in drip irrigated potato field with raised beds and full plastic-film mulch in a semiarid area," Agricultural Water Management, Elsevier, vol. 209(C), pages 178-187.
    5. Cundong Xu & Junjiao Tian & Guoxia Wang & Junkun Nie & Hongyang Zhang, 2019. "Dynamic Simulation of Soil Salt Transport in Arid Irrigation Areas under the HYDRUS-2D-Based Rotation Irrigation Mode," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(10), pages 3499-3512, August.
    6. Lin, Xiaomin & Wang, Zhen & Li, Jiusheng, 2021. "Identifying the factors dominating the spatial distribution of water and salt in soil and cotton yield under arid environments of drip irrigation with different lateral lengths," Agricultural Water Management, Elsevier, vol. 250(C).
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    8. Dorta-Santos, María & Tejedor, Marisa & Jiménez, Concepción & Hernández-Moreno, Jose M. & Díaz, Francisco J., 2016. "“Using marginal quality water for an energy crop in arid regions: Effect of salinity and boron distribution patterns”," Agricultural Water Management, Elsevier, vol. 171(C), pages 142-152.
    9. Xin Liu & Xuefeng Sang & Jiaxuan Chang & Yang Zheng, 2021. "Multi-Model Coupling Water Demand Prediction Optimization Method for Megacities Based on Time Series Decomposition," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(12), pages 4021-4041, September.
    10. Genxiang Feng & Zhanyu Zhang & Zemin Zhang, 2019. "Evaluating the Sustainable Use of Saline Water Irrigation on Soil Water-Salt Content and Grain Yield under Subsurface Drainage Condition," Sustainability, MDPI, vol. 11(22), pages 1-18, November.
    11. Qi, Zhijuan & Feng, Hao & Zhao, Ying & Zhang, Tibin & Yang, Aizheng & Zhang, Zhongxue, 2018. "Spatial distribution and simulation of soil moisture and salinity under mulched drip irrigation combined with tillage in an arid saline irrigation district, northwest China," Agricultural Water Management, Elsevier, vol. 201(C), pages 219-231.

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