Surface Irrigation With A
Variable Inflow Hydrograph
Author(s)
B. Mostafazadeh-Fard & Y. Osroosh
Abstract
Surface irrigation is one of the most common methods of irrigation in which its
hydraulic behaviour is influenced by the inflow hydrograph. The use of
electronic devices in surface irrigation to manage water delivery to the field is
important because the water losses can be decreased which results in higher
application efficiency. Previous studies have shown that the efficiency of surface
irrigation is influenced by the inflow hydrograph shape. In this study, an
electronic device has being designed and constructed that is able to regulate the
irrigation pump outflow to produce different furrow or border inflow
hydrographs including constant inflow, cut-back inflow, gradual reducing
inflow, modified cut-back inflow, modified gradual reducing inflow and surge
inflow for actual field conditions. The device is controlled by computer and can
be programmed for actual field conditions data for any desired inflow rate,
inflow variations and irrigation time in order to increase water application
efficiency. Based on information given, the device can control deep percolation
along the field and runoff at the lower end. The system can also be programmed
to account for infiltration characteristics changes along the irrigation season to
reduce losses.
Keywords: surface irrigation, inflow hydrograph, automation.
1 Introduction
Surface irrigation is one of the oldest methods of irrigation in which soil surface
is used to convey and infiltrate water [8]. This method of irrigation as compared
with sprinkler or trickle methods is inexpensive. Therefore, more attention is
being paid to improve the efficiency of surface irrigation. For instance runoff
Keywords
surface irrigation, inflow hydrograph, automation.
Related Book
Other papers in this volume
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