| Development and hydraulic performance test of subsurface direct\|insertion rubber\|plastic infiltration dripper |
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| DOI：10.7606/j.issn.1000-7601.2022.05.12 |
| Key Words: rubber-plastic porous pipe subsurface infiltration irrigation labyrinth of runners blockage hydraulic performance |
| Author Name | Affiliation | | HASSANN Butera | Faculty of Modern Agriculture Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | HE Jiajun | Faculty of Modern Agriculture Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | LIU Yanwei | Faculty of Modern Agriculture Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | YANG Qiliang | Faculty of Modern Agriculture Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China | | MIAO Weiwei | Faculty of Modern Agriculture Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China |
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| Abstract: |
| In the process of line source irrigation, the rubber\|plastic porous pipes have a high manufacturing deviation coefficient and significant waterhead loss. Given these issues, a point\|source irrigation method of subsurface direct\|insertion rubber\|plastic infiltration dripper was designed in this study using the labyrinth channel technology, with the rubber\|plastic porous tube as the column\|shaped outflow surface. Then, the hydraulic performance of the dripper was tested. Specifically, the dripper was buried in the flowerpot. The results showed that the coeffient of variation of dripper flow was 4.17%. The pressure\|flow relationship was q=0.6435h0.4161, demonstrating a preferable pressure compensation performance. Besides, the short\|period anti\|clogging test was conducted with the intermittent muddy drip irrigation test method. Under three sediment concentrations (W1=0.5 g·L-1, W2=1.0 g·L-1, W3=1.5 g·L-1) and the working pressure of 100 kPa, the effective irrigation times of the dripper were 15, 11, and 5, respectively. This reflects that the dripper had excellent anti\|clogging performance. Furthermore, the dripper was buried 30 cm deep under the working pressure of 100 kPa for continuous irrigation tests. There was no deep seepage phenomenon, the soil moisture was evenly distributed, and the wetness peak reached the soil surface after 580 minutes. The comprehensive results indicated that the dripper had good hydraulic performance and anti\|clogging performance, as well as a large volume of the wetted body. Thus, it can be widely used in orchard irrigation and scientific research experiments. It is hoped that this research provides a reference for the point\|source irrigation of rubber\|plastic infiltration pipes. |
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