| 摘要: |
| 为了高关灌区灌溉水利用系数的测算分析、水资源优化配置和实现最严格水资源管理决策提供科学依据。本文以高关灌区中稻试验田为样本，采用平均法、实测法、对比实测法分别测算高关灌区中稻田间水利用系数。结果表明：三种方法测算出来的系数分别为0.903、0.941和0.921，实测法测算出来系数最大，平均法测算出来系数最小，但三种方法测算出来的系数相差不大，误差在5%以内。得出结论：高关灌区中稻田间水利用系数随灌水定额增大而减小，呈负相关关系；对比实测法与实测法相比，认为田面渗漏是稻田的有效耗水，田埂渗漏则是稻田的无效耗水，避免了中间测定造成的累积误差，适用于稻作区田间水利用系数的测定；对比实测法测算的高关灌区中稻田间水利用系数为0.921是合理的。 |
| 关键词: 高关灌区，中稻，田间水利用系数，试验研究 |
| DOI：10.13522/j.cnki.ggps.2019014 |
| 分类号:TV93；S27 |
| 基金项目:湖北省水利厅资助,《湖北省水利重点科研项目》(HBSLKY201805)。 |
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| The Experimental Study on Field Water Utilization Coefficient of Middle-season Rice in Gaoguan Reservoir Irrigation District |
|
QIU YUANFENG
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|
Wuhan University
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| Abstract: |
| In order to provide scientific basis for the calculation and analysis of irrigation water utilization coefficient, optimal allocation of water resources and the most stringent decision-making of water resources management in Gaoguan Irrigation Districts. Taking the middle-season rice field in Gaoguan Reservoir Irrigation District as the sample, the field water utilization coefficient of middle-season rice is calculated by means of average method, measuring method and contrast measuring method. The results show that the coefficients calculated by the three methods are 0.903, 0.941 and 0.921, respectively. The coefficient measured by the measuring method is the largest and the coefficient calculated by the average method is the smallest. However, the coefficients calculated by the three methods are not very different and the error is less than 5%. The conclusions show that the field water utilization coefficient of middle-season rice in Gaoguan Reservoir Irrigation District decreases with the increase of irrigation quota, showing a negative correlation. Compared with the measuring method, it is considered that the field leakage is the effective water consumption of paddy field, and the ridge leakage is the ineffective water consumption of paddy field, which avoids the cumulative error caused by the intermediate measurement and is suitable for the determination of field water utilization coefficient in paddy field. It is reasonable that the field water utilization coefficient of middle-season rice in Gaoguan Reservoir Irrigation District is 0.921 by contrast measuring method. |
| Key words: Gaoguan Reservoir Irrigation District; Middle-season Rice; Field water utilization coefficient; Experimental study |
