scholarly journals Sustainable operation mode of a sand filter in a drip irrigation system using Yellow River water in an arid area

2020 ◽  
Vol 20 (8) ◽  
pp. 3636-3645
Author(s):  
Youquan Jiao ◽  
Ji Feng ◽  
Yanzheng Liu ◽  
Linlin Yang ◽  
Minqi Han
Keyword(s):  
River Water ◽  
Drip Irrigation ◽  
Yellow River ◽  
Irrigation System ◽  
Operation Mode ◽  
Filtration Flow ◽  
Drip Irrigation System ◽  
Sand Filter ◽  
Flow Rates ◽  
Sustainable Operation

Abstract The depletion of water resources directly restricts the sustainable development of agriculture, especially in arid areas. Sand filters are one of the most widely used filters in agricultural water-saving drip irrigation systems, because of their effectiveness in intercepting sewage. Up to now, little information has been reported on the sustainable operation mode of the sand filter in a drip irrigation system using Yellow River water, which is a non-conventional water resource. In our research, based on the study of the change in head loss of the empty tank of the filter using fresh water, we studied the effect of different filter particle sizes, filtration flow rates and backwash flow rates on the filter performance using Yellow River water, and obtained the optimal operation mode of the sand filter for the drip irrigation system. This was achieved when the filter material particle size was 1.70–2.35 mm, the filtration flow rate was 0.018 m/s, and the backwash flow rate was 0.022 m/s. This study provided theoretical support for the large-scale promotion of drip irrigation using Yellow River water, and contributed to maintaining rural, social and economic stability within sustainable development.

scholarly journals Study on Fluid Movement Characteristics inside the Emitter Flow Path of Drip Irrigation System Using the Yellow River Water

2020 ◽  
Vol 12 (4) ◽  
pp. 1319
Author(s):  
Ji Feng ◽  
Weinan Wang ◽  
Haisheng Liu
Keyword(s):  
Flow Field ◽  
River Water ◽  
Turbulence Model ◽  
Drip Irrigation ◽  
Yellow River ◽  
Irrigation System ◽  
Flow Path ◽  
The Yellow River ◽  
Drip Irrigation System ◽  
Movement Characteristics

Vigorously developing efficient water-saving agricultural technologies using the Yellow River Water is an important way to achieve sustainable use of water resources. In order to clarify the fluid movement characteristics inside the flow path of the emitter under complicated water quality conditions in a drip irrigation system using the Yellow River Water, the optimal simulation turbulence model for the flow field in the flow path of the emitter was determined by comparing the macroscopic hydraulic characteristics with the microscopic fluid motion characteristics of the fluid in the emitter. On this basis, the two-phase flow model was used to calculate and analyze the characteristics of water flow movement and particle transport in the emitter. The results show that the RNG (Re- normalization group) k-ε turbulence model was the most suitable for the simulation of the flow field in the emitter, considering the macroscopic hydraulic performance and microscopic anti-clogging ability of the emitter synthetically, and both the comprehensive calculation accuracy and the calculation efficiency. The pressure showed a step-like uniform decrease along the direction of water flow. The fluid flow showed the regional movement characteristics of the mainstream and non-mainstream regions. The energy dissipation mainly occurred at the sudden change sites of the flow path structure. The particle phase velocity was slightly lower than that of the water phase. The velocity at the near-wall surface was relatively lower than that at the center, and the velocity distribution along the depth direction of the flow path was relatively uneven. The sediment was mainly deposited in the first half of the flow path. This study can provide a theoretical basis for solving the emitter clogging in the drip irrigation systems applying water from the Yellow River.

ESTIMATION OF CONSUMPTIVE USE OF POTATO CROP PIANTED UNDER DRIP IRRIGATION SYSTEM BY USING SWRT TECHNOLOGY

2020 ◽  
Vol 10 (1) ◽  
pp. 271-282
Author(s):  
J.N. Abedalrahman ◽  
R.J. Mansor ◽  
D.R. Abass
Keyword(s):  
Water Consumption ◽  
Drip Irrigation ◽  
Soil Depth ◽  
Irrigation System ◽  
Potato Crop ◽  
Block Design ◽  
Organic Fertilizer ◽  
Control Treatment ◽  
Drip Irrigation System ◽  
Spring Season

A field experiment was carried out in the field of the College of Agriculture / University of Wasit, located on longitude  45o   50o   33.5o   East and latitude 32o 29o 49.8o North, in Spring season of the agricultural season 2019, in order to estimate the water consumption of potato crop using SWRT technology and under the drip irrigation system. The experiment was designed according to Randomized Complete Block Design (RCBD) with three replications and four treatments that include of the SWRT treatment (the use of plastic films under the plant root area in an engineering style), and the treatment of vegetal fertilizer (using Petmos), organic fertilizer (sheep manure), and the control treatment . Potato tubers (Solanum tuberosum L.)  var. Burin was planted for spring season on 10/2/2019 at the soil depth of 5-10 cm. The highest reference water consumption for the potato crop during the season was calculated by Najeeb Kharufa, which was 663.03 mm. The highest actual water consumption for the potato crop during the season for the control treatment was 410.1 mm. The results showed increase in the values of the crop coefficient (Kc) in the stages of tubers formation and tubers filling stage as compared to the vegetative and ripening stages, ranged from 1.37-1.92 for the two stages of tubers formation and tubers filling. The SWRT treatment gave the highest water use efficiency during the season, was 3.46 kg m-3 .

A kinetic model for the chemical clogging of drip irrigation system using saline water

2019 ◽  
Vol 223 ◽  
pp. 105696 ◽  
Author(s):  
Lili Zhangzhong ◽  
Peiling Yang ◽  
Wengang Zhen ◽  
Xin Zhang ◽  
Caiyuan Wang
Keyword(s):  
Kinetic Model ◽  
Drip Irrigation ◽  
Saline Water ◽  
Irrigation System ◽  
Drip Irrigation System
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