Analysis and Design of Trickle‐Irrigation Laterals

Hathoot, Helmi M.; Al-Amoud, Ahmed I.; Mohammad, Fawzi S.

doi:10.1061/(asce)0733-9437(1993)119:5(756)

Cited by 74 publications

(28 citation statements)

References 7 publications

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“…The velocity head is neglected, but the variable discharge is included in the basic derivation. [5,6] have presented an equation applying the energy equation for two successive drippers. The friction coefficient is also reported for different ranges of the Reynolds number variation.…”

Section: Introductionmentioning

confidence: 99%

Effect of drip irrigation circuits design and lateral line length on: II-flow velocity and velocity head

Tayel¹,

Lightfoot²,

Mansour³

2012

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Section: Introductionmentioning

confidence: 99%

Effect of drip irrigation circuits design and lateral line length on: II-flow velocity and velocity head

Tayel¹,

Lightfoot²,

Mansour³

2012

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“…The Forward-Step Method equation [14] [9] except for the addition of the local head loss term due to emitter insertions estimated as kinetic head multiplied by the emitter head loss coefficient α.…”

Section: Single Lateralmentioning

confidence: 99%

“…Basic differences in the approaches are essentially the inclusion or not of the velocity head and minor losses due to emitter insertion, and the treatment of the emitter discharges as constant or variable along the lateral. However, the forward-step method proposed by Hathoot et al [9] has been described by many authors [e.g. 10,11] as the most accurate method.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic modelling of drip irrigation systems used for grass establishment on steep slopes

Gyasi‐Agyei¹

2006

WIT Transactions on Ecology and the Environment, 96

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Erosion damage to railway embankment and cutting steep slopes (batters) causes a significant cost of remediation within the coal railway network of Central Queensland, Australia. It has been established that grass cover of 60% reduces erosion by over 90%. Given that water is a scarce commodity in the semi-arid environment, a more efficient water use cost-effective drip irrigation system is imperative. The hydraulic modelling of drip irrigation systems design is presented. It takes into account the velocity head change and a proper selection of the friction coefficient formula based on the Reynolds number. Fittings and emitter insertion head loss are incorporated into the hydraulic model. A case study of the use of the hydraulic model to analyse the drip irrigation systems is presented.

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“…It was reported that a sub-main unit can be analyzed accurately using a personal computer (Bralts and Segerlind 1985;Bralts et al 1993;Kang and Nishiyama 1994). Hathoot et al (1993) presented a stepwise calculation method where a small increment of pressure head is given at the lateral inlet to perform the analytical and design works. However, it is also difficult to design paired laterals with this method.…”

Section: Introductionmentioning

confidence: 99%

Application of unsteady flow analysis in designing a multiple outlets sprinkler irrigation system

Trung

Nishiyama

Anyoji

2007

Paddy Water Environ

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A simplified method has been developed for designing and calculating sprinkling systems by cutting lines across laterals at points next to the first sprinkler with a view to divide the system into two separate parts; field and basic. Equations of lateral pressure heads were used to express the relationship between inlet pressure head and velocity of the flow pumped to laterals on the field part. The above equations were then used to set up calculating conditions for the Basic part by unsteady flow method in order to define head and discharge at downstream end of the pipe in the Basic part. The forward step method was used for determining distributions of the pressure head and the emitter discharge along each lateral. A calculating schema on computer has been carried out in order to apply the method to any sprinkling system. The procedure of analysis and calculation showed that this method is generally accurate, simple and rapid.

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Analysis and Design of Trickle‐Irrigation Laterals

Cited by 74 publications

References 7 publications

Effect of drip irrigation circuits design and lateral line length on: II-flow velocity and velocity head

Effect of drip irrigation circuits design and lateral line length on: II-flow velocity and velocity head

Hydraulic modelling of drip irrigation systems used for grass establishment on steep slopes

Application of unsteady flow analysis in designing a multiple outlets sprinkler irrigation system

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