Study on translocating speed and water distribution uniformity of lightweight lateral move irrigation system.
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Distribution uniformity
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A central objective in irrigation science is the improvement of the water use efficiency (WUE). Mostly the focus is laid on improvements and innovations in irrigation technology. The characteristics of soils are often considered to be of secondary importance or totally disregarded. This paper reports on the simulation of a sensor network based irrigation system. The simulation was designed for a lateral move irrigation system with a notional irrigated area of 100 × 200 m. A grid-based network with soil specific calibrated and wireless moisture sensors (SMSN) captures the actual soil water content and calculates the corresponding water tensions simultaneously. The simulation in this paper is presented with two different modes of irrigation: the undifferentiated and evenly distributed irrigation (UDI-mode) and the differentiated precision irrigation (DPI-mode) which is adapted to the soil properties. The UDI-mode has been the most frequently applied practice so far and connected with an uncontrolled application of irrigation water. A supply under or over the real water demand of the plants is the consequence. In the DPI-mode the amount of given water is controlled by the soil water tensions (SWTs) calculated by pedotransfer functions (PTFs).
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Surface irrigation
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Based on the field experimental data both for clean and muddy water under continuous irrigation and surge flow irrigation, the water uniformity, irrigation efficiency and water storage efficiency of surge flow irrigation are firstly evaluated in this paper. A new method for calculating the criteria of surge flow irrigation quality is suggested. This method enables the evaluation to be carried out without soil water data after irrigation, thus making it possible to simulate the irrigation quality mathematically and optimize the irrigation technical element in surge flow irrigation.
Surface irrigation
Low-flow irrigation systems
Irrigation statistics
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According to the laws of irrigation water moving, the seeping and moving model of irrigation water are bcilt by the basic equation of soil water. The test and simulation of irrigation water in wheat and corn filed have been studied for sprinkler irrigation, drip irrigation, percolation irrigation and surge flow irrigation. The mechanisms of the four irrigation systems ars analyzed in this paper.
Low-flow irrigation systems
Irrigation statistics
Surface irrigation
Return flow
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As pointed in Twelfth Five-year Plan,water saving irrigation and low energy consumption should be ensured at the same time.So,the micro-irrigation technology with low pressure and low energy consumption will be the core of water saving irrigation development in the future.Two different types of drip irrigation tapes,which are used frequently in autonomous region key automation drip irrigation demonstration base,are selected as research objects in this experiment to study the effects of different laying slope,length and inlet pressure on the irrigation uniformity of drip irrigation tapes.The results show that both the two kinds of drip irrigation tapes in this automation drip irrigation demonstration base can satisfy the irrigation requirements,and the irrigation uniformity is well.It is also found in this experiment that the irrigation uniformity of A-tape drip irrigation tape is well under low pressure condition,and its energy consumption is lower than that of B-tape.The A-tape can match the requirement of low energy consumption micro-irrigation technique.
Low-flow irrigation systems
Surface irrigation
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Dual purpose
Agricultural machinery
Low-flow irrigation systems
Distribution uniformity
Surface irrigation
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