Planning for cooler cities in Ghana: Contribution of green infrastructure to urban heat mitigation in Kumasi Metropolis

被引:20
作者
Sarfo, Isaac [1 ,13 ]
Bi, Shuoben [2 ,3 ]
Xu, Xiuhua [4 ]
Yeboah, Emmanuel [5 ]
Kwang, Clement [6 ]
Batame, Michael [7 ]
Addai, Foster Kofi [6 ]
Adamu, Umar Wakil [6 ]
Appea, Emmanuella Aboagye [6 ]
Djan, Michael Atuahene [8 ]
Otchwemah, Henry Bortey [9 ]
Kudoh, Vanessa Elikem [6 ]
Vuguziga, Floribert [10 ,14 ]
Samuel, Olumide [11 ]
Koku, John Ernest [12 ]
机构
[1] Henan Univ, Coll Geog & Environm Sci, Kaifeng 475004, Henan, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Res Base Sci Cognit & Protect Culture Heritage, Nanjing, Jiangsu, Peoples R China
[3] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Jiangsu, Peoples R China
[4] NingboTECH Univ, Comp & Data Engn Coll, Qianhu South Rd, Ningbo 315100, Zhejiang, Peoples R China
[5] Nanjing Univ Informat Sci & Technol, Sch Remote Sensing & Geomat Engn, Nanjing 210044, Jiangsu, Peoples R China
[6] Univ Ghana, Dept Geog & Resource Dev, Legon, Ghana
[7] Univ Twente, Dept Nat Resources Management, Enschede, Netherlands
[8] New Mexico State Univ, Dept Geog, Las Cruces, NM USA
[9] Pheebes Consult Ltd, Accra, Ghana
[10] Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ KLME, Collaborat Innovat Meteorol Disasters CIC FEMD, Nanjing 210044, Jiangsu, Peoples R China
[11] Purdue Univ, Dept Anim Sci, 270 S Russell St, W Lafayette, IN 47907 USA
[12] Cent Univ, Dept Social Sci, Miotso Tema, Ghana
[13] Org African Acad Doctors OAAD, Off Kamiti Rd,POB 25305000100, Nairobi, Kenya
[14] Rwanda Meteorol Agcy MeteoRwanda, Kigali, Rwanda
基金
中国国家自然科学基金;
关键词
Garden city; Grand urban model; Land use; Urban heat island; Urbanization; ISLAND; LAND; SPACES;
D O I
10.1016/j.landusepol.2023.106842
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study investigates the spatial variability of some remote sensing indices representing built-up areas, vege-tation, bareness, and urban heat island (UHI), based on time-series Landsat TM/ETM+ and OLI/TIRS datasets archived for 1980-2020 period from the US Geological Survey's website for Kumasi Metropolitan Area in Ghana. Modules for Land Use Change Evaluation (MOLUSCE) and Cellular Automata Artificial Neural Network (CA-ANN) algorithms and simulations in QGIS were used to predict future changes (2020-2050) for land-use systems in Kumasi. Findings revealed urbanization/built-up areas (+108.02%) contributed massively to the decline of forest areas (-93.34%) and farmlands/shrubs (-31.53%), thereby making Kumasi lose its once critical green position as the "Garden City of West Africa." UHI moderately and strongly correlated positively against built-up (R-2=0.78, p < 0.0001) and bareness (R-2=0.96, p < 0.0001) indices, respectively. By contrast, UHI showed a statistically significant inverse relationship with the vegetative index (R-2=0.97, p < 0.0001). Future land-use scenarios revealed more forests, waterbodies, and farmlands/shrubs will be lost, influencing urban temperature and water supply. The multipurpose advantages of urban green space are ingrained in the grand urban model. Contextually, the Metropolis's resilience has been hampered by inconsistency in the performance of institutional roles, competition for land ownership rights over green areas, and little investments or prioritization of green spaces. An integrated collaborative governance framework is proposed to unify actions, address power crisis and factors that influence governance of green infrastructure, UHI and land cover change.
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页数:21
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