| 基于能量平衡原理的潜在蒸散发模型构建 |
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| 引用本文： | 鞠琴,高慧滨,王国庆,郝洁,王振龙,堵同柱,郝振纯.基于能量平衡原理的潜在蒸散发模型构建[J].水科学进展,2022,33(5):794-804. |
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| 作者姓名： | 鞠琴 高慧滨 王国庆 郝洁 王振龙 堵同柱 郝振纯 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏 南京 210098 |
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| 基金项目： | 国家重点研发计划资助项目2021YFC3201104国家自然科学基金资助项目52179013 |
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| 摘 要： | 为深入探索气候变化背景下更为精确的潜在蒸散发计算方法, 在淮北平原五道沟水文水资源实验站开展了3组小型蒸渗仪试验, 通过结合平流运动动力项并引入地表净辐射修正参数, 基于能量平衡原理提出一种新的潜在蒸散发模型。结果表明: ① 3组蒸渗仪实测数据中, 2组不同加水方式下的草地覆被蒸散发相关性较好(R=0.95);②新的潜在蒸散发模型在有草地覆被的2组试验中模拟结果的纳什效率系数(ENS=0.85)和均方根误差(ERMS=0.83)均优于现有Penman系列等经验方法; ③模型更适用于有草地覆被条件下的蒸散发估算, 在淮北平原地区具有较强的适用性与优势。该模型能够提高区域潜在蒸散发模拟精度, 为流域水循环过程模拟及水资源利用提供科学参考。
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| 关 键 词： | 潜在蒸散发 能量平衡 小型蒸渗仪 波文比 五道沟水文水资源实验站 |
| 收稿时间： | 2022-02-10 |
Modeling potential evapotranspiration based on energy balance |
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| Institution: | 1.State Key Laboratory of Hydrology- Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China2.State Key Laboratory of Hydrology- Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China3.Anhui & Huaihe River Institute of Hydraulic Research, Bengbu 233000, China |
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| Abstract: | To investigate a more accurate method for potential evapotranspiration estimation under climate change, three sets of experiments were conducted using small lysimeters at Wudaogou experimental station on the Huaibei Plain (China), and a new model of potential evapotranspiration was proposed by integrating the advection dynamics term and introducing a correction parameter for surface net radiation fluxes on the basis of the energy balance principle. The results revealed the following: ① The correlation between evapotranspiration of the grass cover group (E14 and E25) with different measurement methods was better (R=0.95) among the three sets of experiments. ② The Nash-Sutcliffe efficiency coefficient (0.85) and root mean square error (0.83) of the proposed potential evapotranspiration model were better than those of existing empirical methods such as the Penman equation in the two experiments covered with gras. ③ The model demonstrated capability for estimation of evapotranspiration under grass cover and marked advantages in its application to the Huaibei Plain area. The proposed model can improve the accuracy of regional potential evapotranspiration simulation, and provide scientific reference for water cycle process simulation and water resources utilization. |
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