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2020 Vol.38, Issue 5 Preview Page

Research Article

Soil Water Flow Patterns due to Distance of Two Emitters of Surface Drip Irrigation for Horticultural Crops
Soon Hong Kwon1†
,
Dong Hyun Kim1†
,
Jong Soon Kim1*
,
Ki Yeol Jung2
,
Sang Hun Lee2
,
Joon Kook Kwon3
1Department of Bio-industrial Machinery Engineering, Pusan National University
2Crop Production Technology Division, National Institute of Crop Science
3National Institute of Horticultural and Herbal Science
* Corresponding Author
† These authors contributed equally to this work.
31 October 2020. pp. 631-644
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Abstract

Surface drip irrigation is one of the most efficient systems for irrigating vegetables. The patterns of soil water distribution formed under the emitter are important for designing an optimal drip irrigation system. This study aims to evaluate the soil water patterns between two emitters using field experiments and numerical simulations. Field experiments were conducted using two emitters with different lateral spacings (20, 40, and 60 cm). Frequency domain reflectometry (FDR) sensors were used to measure the soil water content. HYDRUS-2D software was used to simulate water infiltration in the field experiments. At a short lateral spacing (20 cm), the water content started to increase at 30 min and saturated at 200 min. These values became significantly larger as the lateral spacing increased—300 min and saturated at 700 min at 40 cm and 900 min and longer than 22 hours at 60 cm, respectively. The simulated water contents were in satisfactory agreement with the experimental values (R2 = 0.97, RMSE = 0.009 cm3 cm-3, E (coefficient of efficiency) = 0.959). These results provide valuable information that can be used to design an efficient surface drip irrigation system for vegetables, thereby improving crop productivity and quality.

Keywords
emitter spacing
field experiment
numerical model
vegetables
water infiltration

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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 38
  • No :5
  • Pages :631-644
  • Received Date : 2020-04-20
  • Revised Date : 2020-06-26
  • Accepted Date : 2020-06-27
  • DOI :https://doi.org/10.7235/HORT.20200058
Journal Informaiton Horticultural Science and Technology Horticultural Science and Technology
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