Effects of urbanization and functional relief on evaporation in Beijing
LIU Jiahong1,2, LIU Chuang1, ZHOU Jinjun3, SHAO Weiwei1
1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2. Engineering and Technology Research Center for Water Resources and Hydroecology, Ministry of Water Resources, Beijing 100044, China; 3. Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China
Abstract:Rapid urbanization has changed the structure of urban land use which has led to changes in evaporation rates in urban areas. Evaporation mechanisms include the common evaporation from the underlying urban surface as well as evaporation inside buildings. Urban surfaces can be divided into road, green spaces, water surfaces and buildings. This paper analyzes evaporation rates for the urbanization levels in six Beijing districts during 2000, 2015 and 2018. Both natural evaporation and the water dissipation inside buildings are considered to analyze the impact of urbanization and non-capital functions relief on the urban regional evaporation. The results show that urbanization significantly enhances the evaporation from urban construction land and the population density is the key factor affecting the evaporation. The deconstruction of the non-capital function reduces the urban social water use and the urban regional evaporation. This analysis of the contributions from the various underlying surfaces to the regional evaporation shows that buildings and green spaces provide most of the evaporation.
刘家宏, 刘创, 周晋军, 邵薇薇. 城镇化和功能疏解对北京市蒸散发的影响[J]. 清华大学学报(自然科学版), 2022, 62(12): 1964-1971.
LIU Jiahong, LIU Chuang, ZHOU Jinjun, SHAO Weiwei. Effects of urbanization and functional relief on evaporation in Beijing. Journal of Tsinghua University(Science and Technology), 2022, 62(12): 1964-1971.
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