INVESTIGATION OF THE RELATIONSHIP BETWEEN DISCHARGE – PRESSURE AND DISCHARGE – TEMPERATURE IN THE CONVENTIONAL NON-COMPENSATING AND COMPENSATING EMITTING PIPES

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ABDI S.; MAROUFPOOR E.

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Journal: Journal of Water and Soil Conservation Year:2016 | Volume:23 | Issue:1 Page(s): 233-245

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Title

INVESTIGATION OF THE RELATIONSHIP BETWEEN DISCHARGE – PRESSURE AND DISCHARGE – TEMPERATURE IN THE CONVENTIONAL NON-COMPENSATING AND COMPENSATING EMITTING PIPES

Author(s)

ABDI S. | MAROUFPOOR E. | Issue Writer Certificate

Keywords

TRICKLE IRRIGATIONQ2

COMPENSATINGQ1

TEMPERATUREQ2

EMITTERQ2

TRICKLE IRRIGATION TAPEQ1

Abstract

Background and Objectives: EMITTERs discharge is influenced by various factors such as pressure, manufacturing coefficient of variation, clogging or irrigation water TEMPERATURE changes. Emitting pipes according to the hydraulic and technical specifications, the use of them in the TRICKLE IRRIGATION systems are increasing. Therefore investigation of the relationship between discharge – pressure and discharge – TEMPERATURE is required in these pipes in order to improve the efficiency of TRICKLE IRRIGATION systems. Maroufpoor and Parvini found with investigation of the relationship between discharge – pressure and discharge- TEMPERATURE, that in all EMITTER and tested TEMPERATUREs power of the discharge – pressure equation was less than 0.2 and all EMITTERs were pressure COMPENSATING. The effect of TEMPERATURE on the discharge of 3 EMITTERs at 95 percent was significant and was non-significant for other EMITTERs.Materials and Methods: In order to evaluate the effect of TEMPERATURE and pressure on EMITTERs discharge, 8 emitting pipes, 6 types of non-compensating and 2 COMPENSATING ones were tested on the constructed physical model of drip irrigation in the water laboratory of University of Kurdistan. In each experiment, according to the standard on every model from the emitting pipes slices, 25 slices were selected randomly. Each slices was consisted of 5 unit EMITTERs. Slices length varied proportional to the distance of unit’s EMITTERs in the range of 2 to 5 m. The effects of four different water TEMPERATUREs (13, 23, 33 and 43°C) with different pressure ranges (between zero and 1.2 times more than the maximum pressure) on the EMITTERs were evaluated. The thermostat and element were used to supply water TEMPERATUREs of 23, 33 and 43°C. To supply water TEMPERATUREs 13°C was used for the ice pieces. Generally in every TEMPERATURE, discharge of COMPENSATING emitting pipes was measured at 10 pressures and in the non-compensating emitting pipes was measured at 7 pressures. Data analysis was performed in a randomized complete block design using SAS software.Results: According to the results obtained from the experiments of discharge- pressure at all TEMPERATUREs, in the both C1 and C4 emitting pipes, power of the discharge – pressure equation was less than 0.2, therefore, as COMPENSATING were acceptable and of good flexibility. As well as in the rest of the emitting pipes power of equation was variable between 0.2 and 1 and as non-compensating and of the high degree of flexibility. According to the results obtained from the experiments discharge – TEMPERATURE, in the all emitting pipes of non-compensating, the effect of TEMPERATURE on discharge at 95 percent was significant, that generally discharge had increased with increasing TEMPERATURE. In the COMPENSATING emitting pipes with increasing TEMPERATURE from 13°C to 23°C, flow rate has increased at 95 percent significantly, but from TEMPERATURE of 23°C to TEMPERATURE 43°C there was no significant difference between EMITTERs discharge.Conclusion: In general it can be concluded that the relationship of discharge – pressure in the external and internal emitting pipes of common market is acceptable and desirable. Also it is suggested that, in the design of TRICKLE IRRIGATION systems that uses emitting pipes, the effect of TEMPERATURE on the discharge of emitting pipes units must be ensured and the necessary correction coefficients be applied for EMITTER nominal flow rate.

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APA: Copy

ABDI, S., & MAROUFPOOR, E.. (2016). INVESTIGATION OF THE RELATIONSHIP BETWEEN DISCHARGE – PRESSURE AND DISCHARGE – TEMPERATURE IN THE CONVENTIONAL NON-COMPENSATING AND COMPENSATING EMITTING PIPES. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 23(1), 233-245. SID. https://sid.ir/paper/156582/en

Vancouver: Copy

ABDI S., MAROUFPOOR E.. INVESTIGATION OF THE RELATIONSHIP BETWEEN DISCHARGE – PRESSURE AND DISCHARGE – TEMPERATURE IN THE CONVENTIONAL NON-COMPENSATING AND COMPENSATING EMITTING PIPES. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2016;23(1):233-245. Available from: https://sid.ir/paper/156582/en

IEEE: Copy

S. ABDI, and E. MAROUFPOOR, “INVESTIGATION OF THE RELATIONSHIP BETWEEN DISCHARGE – PRESSURE AND DISCHARGE – TEMPERATURE IN THE CONVENTIONAL NON-COMPENSATING AND COMPENSATING EMITTING PIPES,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 23, no. 1, pp. 233–245, 2016, [Online]. Available: https://sid.ir/paper/156582/en

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