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| DOI：10.13522/j.cnki.ggps. 2023438 |
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| Thoughts and Suggestions on Deep Water Saving of Agriculture in Hetao Irrigation District |
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ZHANG Yiqiang, BAI Qiaoyan, LIU Qi
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1. Water conservancy Service Center of Bayannur City, Bayannur 015000, China; 2. Inner Mongolia Agricultural University,
Water Conservancy and Civil Engineering College, Hohhot 010018, China
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| Abstract: |
| 【Objective】The purpose of this paper is to synthesize the results of modernization and transformation of the existing river-loop irrigation area, and to explore the potential and problems of the irrigation area in agricultural deep water conservation under the current situation.【Method】Using mathematical and statistical methods, the water data information of the Hetao Irrigation District from 2015 to 2022, such as ecological Yellow River water consumption, agricultural Yellow River water consumption, spring and fall irrigation water consumption and irrigated area in the past years, were statistically analyzed.【Result】As of 2022, the efficient water-saving irrigation area accounted for 22.7% of the effective irrigation area, and the effective utilization coefficient of irrigation water for farmland in the irrigation area reached 0.457, which was significantly higher than that in 2015. since 2015 to 2022, the ecological water demand of the irrigation area has been around 400 million m3 per year, and the average annual water volume of fall irrigation was 1.477 billion m3, accounting for 34.1% of the average annual water consumption, with Nearly half of the fall irrigation water is used to replenish groundwater; the annual fall irrigation area was 40 800 hm2, accounting for about 53% of the irrigated area in the irrigation area, and the converted net fall irrigation water in the field was 1 980 m3/hm2, which is about 300 m3/hm2 more than the recommended net fall irrigation quota.【Conclusion】The water saving threshold of the irrigation area is 4 billion m3, in addition, about 400 million m3 of ecological water should be introduced every year; the water saving potential of the irrigation area is mainly in fall irrigation, which can be realized by compressing the fall irrigation area, rotating the fall irrigation in sub-regions and sub-annuals, adjusting the planting structure, and developing high-efficiency and water-saving agriculture, etc.; the irrigation area water right trading should be prioritized within the city, and the engineering projects should be prioritized to be selected in the main canal and the sub-main canal carry out. |
| Key words: Hetao irrigation district; deep water saving; water-saving threshold; transfer of water rights |
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