Guan'gai paishui xuebao (Jun 2023)
Optimization of Drip Irrigation Belt with Interior Embedded Patches Using Orthogonal Results Analysis
Abstract
【Objective】 Embedding patches in drip irrigation belts is a technique to improve flow rate and irrigation uniformity. The purpose of this paper is to investigate the impact of various factors on performance of the embedded patches in improving irrigation uniformity. 【Method】 Using uniform orthogonal design of experiments with three levels of factors and experimental study, we analyzed the influence of sediment content, working pressure and slope on performance of the irrigation belt. The relationship between change in these factors and irrigation uniformity was analyzed using the PPR model, NSGA-II model and linear regression models. 【Result】 ①The influence of the three factors on irrigation uniformity and flow rate reduction was ranked in the following order based on their significance: sediment content>land slope>working pressure. Analytic hierarchy process and range analysis both showed that sediment content had the greatest influence on irrigation uniformity and flow rate reduction. ②Regression showed that irrigation uniformity and flow rate reduction were linearly correlated to flow rate, with the standard error for the former and the latter being 19.15% and 14.81%, respectively. ③The projection tracking regression for change in irrigation uniformity and flow rate reduction showed that the standard error for the irrigation uniformity and flow rate reduction was 2.98% and 2.42%, respectively. 【Conclusion】 The PPR model was better than multiple regression model for predicting irrigation uniformity and flow rate reduction. Its results are consistent with that of NSGA-II. For the three factors we considered, the optimal working conditions for the drip irrigation belt with embedded patches were slope: 0, sediment content: 1 g/L, working pressure: 96 kPa, under which the irrigation uniformity was 0.958 5 and the flow rate reduction was 0.083 5.
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