Analysis of Alleviation of Urban Heat Island Effect by Wetlands in Beijing

doi:10.11924/j.issn.1000-6850.casb15050170

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (22): 199-205.doi: 10.11924/j.issn.1000-6850.casb15050170

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Analysis of Alleviation of Urban Heat Island Effect by Wetlands in Beijing

Kang Xiaoming^1,2,3, Cui Lijuan^1,2,3, Zhao Xinsheng^1,2,3, Li Wei^1,2,3, Zhang Manyin^1,2,3, Ma Muyuan^1,2,3, Lei Yinru^1,2,3, Wei Yuanyun^1,2,3

(¹Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091;²Beijing Key Laboratory of Wetland Services and Restoration, Beijing 100091;³Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399)

Received:2015-05-28 Revised:2015-07-03 Accepted:2015-06-23 Online:2015-08-20 Published:2015-08-20

Abstract

Abstract: To study the impacts of Beijing wetlands on urban heat island effect, the temperature of different surface types and the cooling effect of different wetland types were compared by using remote sensing images and observed data at multiple spatial and temporal scales. The paper aims to explore the function of wetlands in Beijing in regulating regional climate and alleviating the urban heat island effect. The results showed that wetlands played a significant role in mitigating the urban heat island effect (P<0.001) due to the low temperature, the cooling effect of wetlands was obviously higher than that of vegetation and bare land (P<0.0001). The temperature range increased gradually with the lapse of time, following a pattern of 2012>2004>1996. Moreover, the observed results in 2013 also showed that air temperature increased (R²≥0.88, P<0.01) with the distance increasing from wetlands. According to the four-year inversed temperature data of MODIS, the research findings suggested that lakes depressed the surface temperature more pronouncedly than rivers (P<0.01), by about 7.5-10.9℃ and 4.4-7.2℃, respectively. Therefore, the authors suggest constructing more wetlands with appropriate types and patterns and allocating wetland resources rationally to make best use of the integrated functions of urban wetlands in regulating regional climate and reducing urban heat island effect.

Kang Xiaoming,Cui Lijuan,Zhao Xinsheng,Li Wei,Zhang Manyin,Ma Muyuan,Lei Yinru and Wei Yuanyun. Analysis of Alleviation of Urban Heat Island Effect by Wetlands in Beijing[J]. Chinese Agricultural Science Bulletin, 2015, 31(22): 199-205.

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Analysis of Alleviation of Urban Heat Island Effect by Wetlands in Beijing

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