Development of a simplified model for predicting the optimum lengths of drip irrigation laterals with coextruded cylindrical in-line emitters

Yürdem, Hüseyin; Demir, Vedat; Mancuhan, Aysegul

doi:10.1016/j.biosystemseng.2015.06.010

Cited by 20 publications

(10 citation statements)

References 33 publications

(45 reference statements)

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“…The greater the flow path length, the more contact time between water and labyrinth channel, which increased the effect of energy dissipation, decreasing the water velocity, finally leading to a decrease in scouring capability and an accumulation of sediments; this results in a decrease in Dra and CU. 64,65 Additionally, a longer flow path might increase the surface area on which bacteria attach, resulting in an increase in EPS, and further increased the risk of emitter clogging caused by adsorbed biofilm when it entered the emitter flow path. 6 In addition, lower flow path area could increase the flow rate, resulting in an increase in hydraulic scour force, thus significantly inhibiting the formation and accumulation of biofilm.…”

Section: Discussionmentioning

confidence: 99%

Emitter clogging characteristics under reclaimed wastewater drip irrigation: a meta‐analysis

Liu

Zhang

2022

J Sci Food Agric

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BACKGROUND: Although reclaimed wastewater drip irrigation (RWDI) is an effective technology for alleviating agricultural crop water stress and protecting the environment, the reclaimed wastewater (RW) may cause emitter clogging. Discharge ratio variation (Dra) and coefficient of uniformity (CU) play a key role in exploring the clogging degree of the emitter. Therefore, a meta-analysis was conducted to identify optimal management methods with an acceptable Dra and CU under RWDI. RESULTS:The results indicate that the higher the concentration of various substances in RW, the higher is the risk of the emitter clogging. Suitable concentrations of iron (Fe), manganese (Mn), total suspended solids (TSS), chemical oxygen demand (COD), water hardness and calcium ions (Ca 2+ ) in RW were determined to be 0-0.2, 0-0.02, 0-50, 20-30, 200-250 and 0-40 mg L −1 , respectively. Pressure-compensating emitters with relatively high discharge (>2 L h −1 ) could prevent clogging in RWDI systems.CONCLUSION: Based on the data analysis, a cumulative RWDI operation time of 375 h was determined as the most suitable time for lateral flushing to prevent clogging. This study identifies the conditions under which an increase in the service life of RWDI systems can be achieved.

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Section: Discussionmentioning

confidence: 99%

Emitter clogging characteristics under reclaimed wastewater drip irrigation: a meta‐analysis

Liu

Zhang

2022

J Sci Food Agric

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“…Guo et al [15] designed a two-way opposed flow channel and applied CFD to analyze the relationship between flow rate and working pressure. In order to improve the hydraulic performance and energy dissipation efficiency, many scholars had put forward many new design concepts and structural types of drip irrigation emitters [16,17]. The fractal flow channel designed on the basis of fractal theory can effectively reduce the flow index [18].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Hydraulic Behavior of a Bionic-Structure Drip Irrigation Emitter

Xu¹,

Su²,

Su³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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The bionic structure drip irrigation emitter (BSDE) is a new-type emitter, by which better hydraulic performances can be obtained. In the present work, twenty-five sets of orthogonal test schemes were implemented to analyze the influence of the geometric parameters of the flow channel on the hydraulic characteristics and energy dissipation efficiency of this emitter. Through numerical simulations and verification tests, the flow index and energy dissipation coefficient were obtained. According to the results, the flow index of the BSDE is 0.4757-0.5067. The energy dissipation coefficient under the pressure head of 5-15 m is 584-1701. The verification test has shown that the relative errors among measured values, simulated values and estimated values are less than 3%, which indicates that the flow index can be estimated reliably.

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“…This approach integrates fertilizer with irrigation through an irrigation system [16], resulting in both fertilizer and irrigation water being applied to the field together, and timing and amount of fertilizer are simultaneously controlled by a device. This method can be adapted to different planting patterns and climatic conditions while providing more accurate and flexible irrigation management options [17][18][19]. In addition, this method possesses characteristics of being time-saving, labor-saving and highly efficient [20] because the timing of fertilization can be controlled, which can improve the spatial and temporal distributions of soil water and nitrogen while having a significant impact on the uniformity of irrigation and fertilization [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A Non-Uniform Broadcast Fertilization Method and Its Performance Analysis under Basin Irrigation

Zhang

Bai

et al. 2020

Water

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The broadcast fertilization method is widely used under basin irrigation in China. A reasonable broadcast fertilization method can effectively improve application performance of fertilization and reduce pollution from non-point agricultural sources. In this study, firstly, a non-uniform broadcast fertilization method and a non-uniform application coefficient were proposed. The value of non-uniform application coefficient is defined in this paper. It represents the ratio of the difference between the maximum and the average fertilization amount of fertilizer applied on the basin surface to the average fertilization amount of fertilizer applied on the basin surface. Secondly, field experiments were conducted to study the movement characteristics of fertilizer under non-uniform broadcast fertilization for basin irrigation. Field experiment results showed that under the condition of basin irrigation, the non-uniform broadcast fertilization method could weaken the non-uniform distribution of fertilizer due to erosion and transport capacity of solid fertilizer by irrigation water flow, which could significantly improve the uniformity of soil solute content. Thirdly, the solute transport model for broadcast fertilization was corroborated by the field experiment results. The variation rule of fertilization performance with non-uniform application coefficient under different basin length and inflow rate was achieved by simulation. The simulation results showed that fertilization uniformity and fertilization storage efficiency increased first and then decreased with the increase of non-uniform application coefficient. In order to be practically applicable, suitable irrigation programs of non-uniform application coefficient under different basin length and inflow rate conditions were proposed by numerical simulation.

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Development of a simplified model for predicting the optimum lengths of drip irrigation laterals with coextruded cylindrical in-line emitters

Cited by 20 publications

References 33 publications

Emitter clogging characteristics under reclaimed wastewater drip irrigation: a meta‐analysis

Emitter clogging characteristics under reclaimed wastewater drip irrigation: a meta‐analysis

Simulation of the Hydraulic Behavior of a Bionic-Structure Drip Irrigation Emitter

A Non-Uniform Broadcast Fertilization Method and Its Performance Analysis under Basin Irrigation

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