Priestley-Taylor模型在浮球覆盖下水面蒸发量估算中的应用
Application of Priestley-Taylor Model in the Estimation of Water Surface Evaporation Covered by Spheres
韩克武 1侍克斌 2严新军 2蒋中明 3雷鹏 3欧阳君4
作者信息
- 1. 新疆农业大学水利与土木工程学院,新疆乌鲁木齐 830052;长沙理工大学水利与环境工程学院,湖南长沙 410114;水沙科学与水灾害防治湖南省重点实验室,湖南长沙 410114
- 2. 新疆农业大学水利与土木工程学院,新疆乌鲁木齐 830052
- 3. 长沙理工大学水利与环境工程学院,湖南长沙 410114;水沙科学与水灾害防治湖南省重点实验室,湖南长沙 410114
- 4. 湖南省水利水电勘测设计规划研究总院有限公司,湖南长沙 410114
- 折叠
摘要
针对漂浮覆盖下干旱区平原水库防蒸发节水效果的评估问题,采用Priestley-Taylor(P-T)模型对浮球覆盖下水面蒸发量进行估算.结合完整非冰冻期内浮球覆盖下整体表面能量平衡组分变化权重,通过以下两种方法计算P-T模型系数α:(1)引入波文比β建立P-T模型系数α1的计算公式;(2)以P-T模型中辐射项为自变量,实测水面蒸发量对应的潜热通量为因变量,通过线性拟合法得出P-T模型系数α2值.根据波文比β和系数α的月际变化特征,在完整非冰冻期、单数月、双数月3种时间尺度下,对应用于P-T模型的估算效果进行分析.结果表明:P-T模型可较好地估算浮球覆盖下的水面蒸发量,而且系数α2(0.42～0.44)对应的P-T模型模拟效果优于系数α1(0.39～0.60)对应的P-T模型模拟效果.该研究结论对科学评价浮球覆盖下干旱区平原水库防蒸发节水效果具有参考价值.
Abstract
To solve the evaluating problem of the water surface evaporation under the coverage of spheres,the P-T model coefficient α is calculated by the following two methods,based on the weights of changes in the overall surface energy balance components covered by spheres during the complete non-freezing period.(1)Bowen ratio β is introduced to establish the calculation formula of the P-T coefficient α1;(2)the P-T coefficient α2 is obtained by the linear fitting method across the origin,which taking the radiation term in the P-T formula as the independent variable,and the latent heat flux corresponding to the measured water surface evaporation as the dependent variable.According to the monthly change trend of Bowen ratio β and coefficient αduring the complete non-freezing period,the P-T model applied to the estimation effect of the water surface evaporation under the coverage of spheres was evaluated in the complete non-freezing period,odd months,and even months.The results show that the P-T model can better estimate the evaporation of the water surface covered by spheres,and the simulation effect of the P-T model corresponding to the coefficient α2(0.42～0.44)is better than the simulation effect of the P-T model corresponding to the coefficient α1(0.39～0.60).The conclusions of this study have reference value for scientific evaluation of evaporation prevention and water saving effect of plain reservoirs in arid areas covered by spheres.
关键词
Priestley-Taylor/能量平衡/波文比/辐射项/蒸发/浮球Key words
Priestley-Taylor/energy balance/Bowen ratio/radiation term/evaporation/sphere引用本文复制引用
基金项目
湖南省教育厅优秀青年项目(22B0309)
校企合作项目(20230472)
新疆维吾尔自治区水利科技专项(T201801)
出版年
2024
NETL
NSTL
万方数据