A rectangular area 900 m long and 400 m wide is required to be irrigated. The soil to be irrigated is ferrasol and is perfectly level without slopes. The 163 mm (internal diameter of 160.5 mm) front displacement machine will be fed by a 200 mm diameter galvanized steel conductive pipe through the use of hydrants and a 160 mm (internal diameter of 138 mm) polyethylene hose. mm). This pipe has a length of 1000 m from the pumping station. Determine the flow rate and pressure needed at the pumping station if: ● ● ● ● ● ● ● The operation of the machine will be one-way irrigation and empty return and it moves at a maximum speed of 2.33 m/min. The water requirement of the crop is 5 mm/day and available time of irrigation per day is 16h. The net irrigation depth is 250 m3/ha. The wet width of the irrigation emitters is 10 m. The hydrants are placed every 300 m, with the first one placed 150 m from the beginning of the plot (see diagram). The hose that connects the conductive pipe to the machine has a length of 165 m. Application efficiency is 85%

A rectangular area 900 m long and 400 m wide is required to be irrigated. The soil to be irrigated is ferrasol and is perfectly level without slopes. The 163 mm (internal diameter of 160.5 mm) front displacement machine will be fed by a 200 mm diameter galvanized steel conductive pipe through the use of hydrants and a 160 mm (internal diameter of 138 mm) polyethylene hose. mm). This pipe has a length of 1000 m from the pumping station. Determine the flow rate and pressure needed at the pumping station if: ● ● ● ● ● ● ● The operation of the machine will be one-way irrigation and empty return and it moves at a maximum speed of 2.33 m/min. The water requirement of the crop is 5 mm/day and available time of irrigation per day is 16h. The net irrigation depth is 250 m3/ha. The wet width of the irrigation emitters is 10 m. The hydrants are placed every 300 m, with the first one placed 150 m from the beginning of the plot (see diagram). The hose that connects the conductive pipe to the machine has a length of 165 m. Application efficiency is 85%

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter11: Hydroelectric Energy

Section: Chapter Questions

Problem 17P

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