Development of a Calculator Model for Water Pump Selection

Abstract

This study was carried out to develop a calculation model for water pump selection given the flowrate, land area, total dynamic head and net irrigation depth required for a farm. Results show that pump motor sizes and irrigation time vary depending on the flowrate, area, total dynamic head, and net irrigation depth required for a field area.  An increase in total dynamic head or desired flowrate leads to a greater pump motor size.  On the other hand, increasing the flowrate decreases the estimated time of irrigation, however, as the land area goes wider, the irrigation time increases. Results also showed the direct relationship between pump motor sizes and irrigation time. This implies that if farmers use a greater pump motor size, it will take a lesser amount of time for them to irrigate their farm. Farmers may vary with each other in terms of the area of their farms and the distance of their field from the water source, results showed that they can irrigate their fields in the same amount of time if they use a specific desired flowrate and if they have the right water pump motor size for their farms.