HYDRUS Projects – Triggered Irrigations
- Project Group: Triggered Irrigations
- Description: Examples demonstrating a new option to simulate irrigation triggered by a decrease of the pressure head at a selected observation node. Irrigation can be triggered at the time-variable pressure head or flux I boundaries, or at the atmospheric boundary.
- Availability: Download HYDRUS projects now (1.2 MB)
- Note: These projects were created with an earlier version of Hydrus, and users using higher Hydrus versions need to convert them to their particular version.
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Project
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Description
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IrrigTr1
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2D Example with triggered irrigation using subsurface flux drip (time-variable flux BC).
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IrrigTr2
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2D Example with triggered irrigation using subsurface pressure head drip (time-variable pressure head BC).
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IrrigTr3
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2D Example with triggered irrigation using surface sprinklers (atmospheric BC).
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Note that this option has recently been used by Dabach et al. (2013):
Dabach, S., N. Lazarovitch, J. Šimůnek, and U. Shani, Numerical investigation of irrigation scheduling based on soil water status, Irrigation Science, 31(1), 27-36, doi:10.1007/s00271-011-0289-x, 2013.
Measured and simulated matric heads during 96 h of the experiments with potential transpiration rate of 3.5 mm/day and with irrigation amounts of a 4 mm and b 1 mm. The irrigation threshold is indicated with a dotted line.
