| Cite this article: | 孙仕军,苏 慧,焦平金,等.暗管埋深与控制排水对农田地下水埋深及排水量影响的研究[J].灌溉排水学报,0,():-. |
| Sun Shijun,Su Hui,Jiao Pingjin,et al.暗管埋深与控制排水对农田地下水埋深及排水量影响的研究[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Shallow buried tile and controlled drainage change groundwater depth and drainage volume |
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Sun Shijun1, Su Hui1, Jiao Pingjin2, Shen Tao3
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1.College of Water conservancy,Shenyang Agricultural University;2.Department of Irrigation and Drainage,China Institute of Water Resources and Hydropower Research;3.Anhui and Huaihe River Institute of Hydraulic Research Key Laboratory of Water Conservancy and Water Resources of Anhui Province
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| Abstract: |
| 【Objective】Strengthening farmland drainage regulation and management, controlling agricultural waterlogging and drought disasters synergistically, quantifying the effects of shallow buried pipe, constant water table regulation (CWTR) and dynamic water table regulation (DWTR) on variation in drainage volume and groundwater depth.【Method】Three buried pipes with a length of 200 m and a spacing of 30 m were buried in Lixin Drainage Test Area, Bozhou City, the outlet of each buried pipe was connected to a water collecting well, the drainage volume of the buried pipe in the water collecting well was measured by an electronic water meter, the groundwater depth was measured in the groundwater observation well which was in the middle of the buried pipe. On the basis of the experiment, the DRAINMOD model was used to simulate the farmland drainage process in the Huaibei Plain during the flood season. 【Result】The results showed that shallow buried pipe and CWTR had similar effects in increasing groundwater depth and reducing the drainage volume. The DWTR and CWTR both raised groundwater depth and reduced subsurface drainage in the early and late crop growth period. In the middle crop growth period, the groundwater depth of the DWTR was significantly lower than that of the CWTR, and the daily subsurface drainage volume of the DWTR was significantly higher than that of the CWTR; for the conventional pipe layout in wet year, the average groundwater depth of the DWTR was lower by 13.9 cm than that of the CWTR, and the subsurface drainage volume of the DWTR was higher by 2.1 times than that of the CWTR. There was a lag time effect in the regulation of groundwater depth and drainage in DWTR, 7 d and 12 d were required to achieve the expected result after changing the height of the subsurface pipe outlet in the conventional and deep-sparse pipe layouts. 【Conclusion】The appropriate dynamic water level regulation under controlled drainage can timely change the groundwater depth and drainage to cope with waterlogging and drought stress. |
| Key words: controlled drainage; shallow buried tile; constant water table; dynamic water table; groundwater depth; drainage volume |
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