The corresponding author Jin-Yong Choi is currently a professor at Seoul National University, and Kwihoon Kim is a graduate student at SNU. The authors major in irrigation, drainage, and agricultural water management. Jin-Yong Choi is currently a vice president of the ICID (International Commission on Irrigation and Drainage). The homepage for Professor Choi`s laboratory is as follows: http://calslab.snu.ac.kr/rwiel/