1. College of Environment and Resources,Fuzhou University,Fuzhou 350116,China 2.Postdoctoral Research Station of Information and Communication Engineering, Fuzhou University, Fuzhou 350116, China 3. Key Lab of Spatial Data Mining and Information Sharing, Ministry of Education, Fuzhou 350116, China 4.Center for Region and Urban and Rural Planning,Fuzhou 350116,China 5.Zhicheng College,Fuzhou University,Fuzhou 350002,China
The urban roof greening has the effects such as water interception and ecological environment improvement, and can be an important part of sponge city construction. Taking Gulou, Taijiang, Cangshan Districts of Fuzhou City as the study objects and the remote sensing image of Landsat8 OLI as the main data, the authors extracted the roof greening rate based on sequential maximum angle convex cone(SMACC), constructed the relational models of roof greening rate and global vegetation moisture index(GVMI) humidity indicator, and then simulated and analyzed the roof greening rates. The results show that the roof greening rate in the three districts of Fuzhou is overall low, with an average of only 17.34%; the proportion of greening rate of 10%~20% is 66.55%, and only 5.11% is higher than 50%. The greening rates are different, and there are also changes in humidity, indicating that the roof vegetation has remarkable water interception capacity. The quadratic fumction model of roof humidity h and greening rate r is the optimization model. When the roof greening rate is higher than 16.30%, the intercepting effect begins to be obvious. In the process of greening rate increasing from 30% to 60%, the increasing speed of intercepting capacity becomes the fastest, with an average of up to 57.9%. Two typical blocks were selected and the roof greening rates were simulated and analyzed, which further proves the rationality of the above model. The result confirms the intercepting capacity of roof greening and determines the roof greening threshold under the target of water interception, which provides important reference for sponge city construction.
林璐, 许章华, 黄旭影, 吕福康, 王前锋, 林倩. 福州海绵城市建设中屋顶绿化的截水作用研究[J]. 国土资源遥感, 2018, 30(2): 223-230.
Lu LIN, Zhanghua XU, Xuying HUANG, Fukang LYU, Qianfeng WANG, Qian LIN. Study of water storage effect of roof greening in the construction of Fuzhou sponge city. Remote Sensing for Land & Resources, 2018, 30(2): 223-230.
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2018, Vol. 30 
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