Determination of Hydraulic Performance of Trickle Irrigation Emitters used in Irrigation Systems in the Harran Plain

Halil KIRNAK*

Makale detayları

Determination of Hydraulic Performance of Trickle Irrigation Emitters used in Irrigation Systems in the Harran Plain

Yazarlar:

Halil KIRNAK*

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2004 Vol.28 Issue 4, pp.223-230

Belge Tipi:

Makale

Yayın Tarihi:

3/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000809162

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

Trickle irrigation systems' efficiency depends on system uniformity, which is determined by water discharge uniformity from emitters. It is impossible to produce 2 identical emitters due to manufacturing variations. The manufacturer's coefficient of variance is used as a measure of discharge variations of emitters. In this study, manufacturers' reported discharge rates and coefficients of manufacturing variation (CVm) values were compared with test results for various types of in-line emitters manufactured by 4 different companies in Turkey. A total of 9 drip irrigation lines, comprising 7 non-compensating and 2 compensating emitters, were tested at 50, 100, 150, 200 and 250 kPa pressures. Non-compensating emitter types were not tested at 250 kPa. Compensating emitter exponents ranged from 0.02 to 0.05 while non-compensating emitters' values varied between 0.60 and 0.85. Test results showed that only 1 of the 7 non-compensating emitters and both compensating emitters had flow rates within ± 10% of manufacturers' reported values. The t-test between manufacturers' reported and measured mean flow rates at manufacturers' reported nominal operating heads showed that there was no significant statistical difference at the a < 0.05 level. According to ASAE standards, the measured coefficients of manufacturing variation values for non-compensating emitters were not acceptable, although compensating emitters were in the excellent class.

 

Trickle irrigation systems' efficiency depends on system uniformity, which is determined by water discharge uniformity from emitters. It is impossible to produce 2 identical emitters due to manufacturing variations. The manufacturer's coefficient of variance is used as a measure of discharge variations of emitters. In this study, manufacturers' reported discharge rates and coefficients of manufacturing variation (CVm) values were compared with test results for various types of in-line emitters manufactured by 4 different companies in Turkey. A total of 9 drip irrigation lines, comprising 7 non-compensating and 2 compensating emitters, were tested at 50, 100, 150, 200 and 250 kPa pressures. Non-compensating emitter types were not tested at 250 kPa. Compensating emitter exponents ranged from 0.02 to 0.05 while non-compensating emitters' values varied between 0.60 and 0.85. Test results showed that only 1 of the 7 non-compensating emitters and both compensating emitters had flow rates within ± 10% of manufacturers' reported values. The t-test between manufacturers' reported and measured mean flow rates at manufacturers' reported nominal operating heads showed that there was no significant statistical difference at the a < 0.05 level. According to ASAE standards, the measured coefficients of manufacturing variation values for non-compensating emitters were not acceptable, although compensating emitters were in the excellent class.

Makale detayları

Determination of Hydraulic Performance of Trickle Irrigation Emitters used in Irrigation Systems in the Harran Plain

Yazarlar:

Halil KIRNAK*

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2004 Vol.28 Issue 4, pp.223-230

Belge Tipi:

Makale

Yayın Tarihi:

3/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000809162

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Drip irrigation

in-line emitters

manufacturers' coefficient of variance

emitter exponent.

Sayı

Makale detayları

Determination of Hydraulic Performance of Trickle Irrigation Emitters used in Irrigation Systems in the Harran Plain

Yazarlar: Halil KIRNAK*

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2004 Vol.28 Issue 4, pp.223-230

Belge Tipi: Makale

Yayın Tarihi: 3/2004

Belge Dili: Türkçe

Document ID (Org No.): 2000809162

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Drip irrigation

in-line emitters

manufacturers' coefficient of variance

emitter exponent.

Sayı

Yazarlar:

Halil KIRNAK*

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2004 Vol.28 Issue 4, pp.223-230

Belge Tipi:

Makale

Yayın Tarihi:

3/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000809162

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X