| 天津平原区城市化地区蒸散发特征 |
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| 引用本文： | 曹润祥,李发文,李建柱,冯平.天津平原区城市化地区蒸散发特征[J].水科学进展,2021,32(3):366-375. |
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| 作者姓名： | 曹润祥 李发文 李建柱 冯平 |
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| 作者单位： | 天津大学水利工程仿真与安全国家重点实验室, 天津 300072 |
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| 基金项目： | 国家自然科学基金资助项目51779165国家自然科学基金资助项目51879181 |
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| 摘 要： | 为揭示城市蒸散发特征，采用考虑人为热影响的SEBS-Urban模型计算天津平原区2015—2017年逐月蒸散量。使用两步验证法对结果进行检验，首先利用MODIS MOD16产品对非建成区模拟结果合理性进行验证，其次利用城市耗水（UWD）模型得到的天津大学卫津路校区月蒸散量对建成区模拟结果验证。在SEBS-Urban模拟结果基础上，检验Budyko方程在城市化地区的适用性。结果表明:① SEBS-Urban模型精度可靠，体现了蒸散发项在城市地表能量平衡与二元水循环中的相合性；②人为热或社会侧的耗水会导致蒸散发量增加，建成区增幅达85%~115%，整个研究区增幅为7.2%~8.7%；③ Budyko方程在研究区具有较好的拟合效果，可应用于城市地区。本研究成果可为城市化地区蒸散发研究提供必要的参考。
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| 关 键 词： | 蒸散发 地表能量平衡 城市化 SEBS-Urban模型 城市耗水模型 |
| 收稿时间： | 2020-04-30 |
Exploring evapotranspiration characteristics in urbanized areas of Tianjin plain |
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| Affiliation: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China |
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| Abstract: | To reveal the characteristics of urban-based evapotranspiration, a SEBS-Urban model was applied to estimate the monthly evapotranspiration(ET) that occurred in the plain area of Tianjin over 2015—2017 considering anthropogenic heat release. A two-step verification method was used. First, a comparative analysis was performed with the MODIS MOD16 products for rural areas. Second, the urban water dissipation (UWD) framework was used to assess the model's performance in built-up areas. The feasibility of the Budyko formula was explored based on the SEBS-Urban results. Three key results were obtained: ① The SEBS-Urban model is reliable, and the results of the built-up area ET analysis are consistent from the perspectives of an urban surface energy balance and a dualistic water cycle. ② The ET increment ranges up to 85%~115% for the built-up area but only 7.2%~8.7% for the whole study area after including considerations for anthropogenic heat. ③ The Budyko formula obtained good results for estimating evapotranspiration in the study area, suggesting that it can also be applied to urban areas. The results of this study can provide a necessary reference for studies on evapotranspiration in urbanized areas. |
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