Measurement of evapotranspiration during sprinkler irrigation using a precision energy budget (Bowen ratio, eddy covariance) methodology

Uddin, Muhammad Jasim; Hancock, Nicola; Smith, Rod; Foley, Joseph

doi:10.1016/j.agwat.2012.10.008

Cited by 46 publications

(46 citation statements)

References 23 publications

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“…First, ET is obtained based on ground experiment or observation, such as the energy budget (Bowen Ratio, the eddy covariance) method [7,9,10]. Second, some models are used to estimate ET such as the Two-Source Energy Balance Model or the CROPWAT model [7,8,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Different Irrigation Water Requirements of Seed Corn and Field Corn in the Heihe River Basin

Tan

Zheng

2017

Water

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Abstract:The Heihe River is the second largest river in arid areas of China, and the irrigation water of oasis agriculture in its middle reaches accounts for almost 80% of the water resources in the whole watershed. Corn is the most important crop in the middle reaches of the Heihe River, and its water consumption is about 50% of the total agriculture water consumption of the middle reaches. Therefore, in order to effectively use the water resources in the watershed, it is crucial to improve the efficiency of corn irrigation. In this paper, using the Ganzhou District in the middle reaches of the Heihe River as the study region, we carried out a field survey to obtain characteristics of seed and field corn. Based on our results, we conducted parameter calibration using the CROPWAT model and calculated the irrigation water requirements (IWR) of these two corn types. The irrigation water requirements of seed and field corn in the growing seasons were 470.1 and 488.5 mm, respectively. However, we observed big differences in the water consumption sequences of these two corn types. Prior to mid-July, evapotranspiration and IWR of seed corn were 14.3% and 20.1% higher, respectively, than those of field corn. In September, IWR of the two corn types started to decrease, with a value of 82.3 mm for seed corn, which was 32.1% lower than the IWR of field corn (108.7 mm) during the same period. However, there were no significant differences in the irrigation time and single irrigation amount for seed and field corn in the study area. Since corn is widely cultivated in the Zhangye Region, there is a considerable water-saving potential in agriculture if the irrigation water consumption can be adjusted according to the IWR of the two corn types.

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Section: Introductionmentioning

confidence: 99%

Different Irrigation Water Requirements of Seed Corn and Field Corn in the Heihe River Basin

Tan

Zheng

2017

Water

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“…Types of irrigation commonly used are; surface irrigation, sprinkler irrigation and drip irrigation (Hanson, 2005). Sprinkler irrigation is becoming a preferred method when the available water for irrigation becomes scarce (Uddin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Sprinkler irrigation uniformity and crop water productivity of barley in arid region

El‐Wahed

Sabagh

Saneoka

et al. 2015

Emir. J. Food Agric

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“…All days show firstly that there is a substantial imbalance in the energy budget between available energy (R n + D H ), and the ECV-measured flux ( E + H) plus D V . Given that the lesser terms in the energy balance equation were either negligible or effectively cancelled one-another out, and that the ECV footprint was appropriate (Uddin et al, 2013a), we attribute the cause of this 'lack of closure' to the widely-reported tendency of the ECV to underestimate the values of H and E (e.g. Mahrt, 1998;Wilson et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

“…Mahrt, 1998;Wilson et al, 2002). Uddin et al (2013a) analysed the flux foot print of the measured area and found that most of the fluxes (80%) originated from an upwind zone of about 8 m to 15 m diameter area, for a measurement height of 2.0 m and 2.5 m (depending on the weather and crop canopy conditions), i.e. within the 25 m diameter experimental area.…”

Section: Resultsmentioning

confidence: 99%

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Micrometeorology of sprinkler irrigation

Hancock

Uddin

Smith

et al. 2015

Agricultural and Forest Meteorology

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Measurement of evapotranspiration during sprinkler irrigation using a precision energy budget (Bowen ratio, eddy covariance) methodology

Cited by 46 publications

References 23 publications

Different Irrigation Water Requirements of Seed Corn and Field Corn in the Heihe River Basin

Different Irrigation Water Requirements of Seed Corn and Field Corn in the Heihe River Basin

Sprinkler irrigation uniformity and crop water productivity of barley in arid region

Micrometeorology of sprinkler irrigation

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