Title: Comparison and evaluating reaction factor and drainage water quality with respect to direction of surface irrigation
Authors: Zeinab Mirzaie; Rohallah Fatahi; Saeid Eslamian; Azarakhsh Azizi
Addresses: Agriculture College, Shahrekord University, Sharekord, Iran ' Agriculture College, Shahrekord University, Sharekord, Iran ' Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan 8415683111, Iran ' Agricultural Engineering Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Ahwaz, Iran
Abstract: This research was carried out to compare the performance of subsurface drainage laterals for four units including two laterals parallel to irrigation direction which are called LP and two laterals perpendicular to irrigation direction which are called LV. In order to study and compare the behaviour of LP and LV, the reaction factors were calculated. The reaction factors were 0.49 and 0.41 in LP and 1.07 and 1.1 in LV. The reaction factor in LV was greater than LP which is implies that the system works properly, and has a quick response to rainfall inputs in LV. Duncan test was used to examine the changes and results showed that there is not a significant difference between different levels of treatment of reaction factor, but there are significant difference between the different treatment levels of outflow and drainage water salinity, and these are dependent on irrigation direction.
Keywords: subsurface drainage; irrigation direction; reaction factor; drainage water salinity; water quality.
International Journal of Hydrology Science and Technology, 2021 Vol.12 No.2, pp.214 - 222
Received: 30 Aug 2019
Accepted: 15 Apr 2020
Published online: 01 Jul 2021 *