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Assessment of Performance of Low Cost Water Distribution Pipes for Minor Irrigation-2012

Dr M Mahbubul Alam
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted to study the conveyance loss and fuel consumption for plastic pipe, polyethylene pipe and earthen canal water distribution systems, to study the cost effectiveness of the distribution systems considering fuel consumption and to find out optimum engine speed for fuel efficient irrigation in different systems. Four distribution systems were followed as earthen canal, polyethylene pipe (5 inch diameter), polyethylene pipe (4 inch diameter), plastic pipe (3 inch diameter) and cotton pipe (3 inch diameter). All the distribution systems consumed more fuel compared to earthen canal at a specific engine speed range. But the conveyance loss in all the systems was very much lower compared to the earthen canal. For a 60 m (200 ft) earthen canal section the distribution loss was found around 30 percent. For the same length of other distribution systems (polyethylene pipe, plastic pipe and cotton pipe) the conveyance loss was less than 5 percent. Considering specific discharge an engine speed within 1500-1600 RPM was optimum for earthen canal. For polyethylene pipe with 5 and 4 inch diameter 1450 to 1550 RPM was the optimum. For polyethylene and cotton pipe 1400-1500 RPM was the optimum.

Keywords: Water distribution system, Minor irrigation, Low cost pipe

Location: BRRI farm, Gazipur

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To study the conveyance loss and fuel consumption for plastic pipe, polyethylene pipe and earthen canal water distribution systems
To study the cost effectiveness of the distribution systems considering fuel consumption
To find out optimum engine speed for fuel efficient irrigation in different systems.

Methodology:

Four distribution systems were followed as earthen canal, polyethylene pipe (5 inch diameter), polyethylene pipe (4 inch diameter), plastic pipe (3 inch diameter) and cotton pipe (3 inch diameter. The fuel consumption, pump discharge and engine speed (revolution per minute, RPM) was measured. Specific discharge (discharge per unit of fuel consumption) was calculated.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2012, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the distribution systems consume more fuel compared to earthen canal at a specific engine speed range. But the conveyance loss in all the systems was very much lower compared to the earthen canal. For a 60 m (200 ft) earthen canal section the distribution loss was found around 30 percent. For the same length of other distribution systems (polyethylene pipe, plastic pipe and cotton pipe) the conveyance loss was less than 5 percent. Considering specific discharge an engine speed within 1500-1600 RPM was optimum for earthen canal. For polyethylene pipe with 5 and 4 inch diameter 1450 to 1550 RPM was the optimum. For polyethylene and cotton pipe 1400-1500 RPM was the optimum.

Knowledge Management: Report/Proceedings