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Study on the relationship between impervious surface coverage and artificial heat in new urban districts: A case study of Xixian New District, Shaanxi Province |
Ru WANG1,2, Yanfang ZHANG1,2(), Hongmin ZHANG1,2, Yun LI1,2 |
1. College of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China 2. National Experimental Teaching Demonstration Center of Geography (Shaanxi Normal University), Xi’an 710119, China |
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Abstract Based on Landsat data, the authors extracted the impervious surface coverage of the two sceneries in Xixian New District in 2007 and 2016 by the linear spectral mixture model decomposition method, and extracted the artificial thermal information by the surface energy balance method in the same period, and investigated the relationship between them. The results are as follows: ① From 2007 to 2016, the impervious surface expanded from 294.93 km 2 to 362.62 km 2, and gradually changed from natural surface and low coverage to medium and high coverage. ② In 2016, the regional differences of anthropogenic heat in the study area were significant. The high-value areas were concentrated in the north-central part of Fengdong New Town and around Xianyang International Airport of Airport New Town, and were scattered in the central part of Qinhan New Town, northern part of Fengxi New Town and part of Jinghe New Town. ③ The mean values of impervious coverage and anthropogenic thermal mean values of land use showed the tendency of construction land>cultivated land>woodland>water body. ④ There was a positive correlation between impervious coverage and artificial heat, with a correlation coefficient of 0.97. The rate of increase of artificial heat values with impervious coverage had the tendency of Airport New Town>Fengdong New Town>Jinghe New Town>Qinhan New Town>Fengxi New Town.
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Keywords
Xixian New District
impervious surface coverage
anthropogenic heat
linear spectral mixing model
surface energy balance method
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Corresponding Authors:
Yanfang ZHANG
E-mail: zhangyf@snnu.edu.cn
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Issue Date: 14 March 2020
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