Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale
As urbanization accelerates and urban hydrological cycles evolve, roof typology emerges as a pivotal role in water retention capacity and drainage efficiency. To systematically evaluate the influence of various roof types on urban hydrological processes, this study designed four distinct catchment s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Hydrology |
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| Online Access: | https://www.mdpi.com/2306-5338/12/6/154 |
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| author | Chaohui Chen Hao Hou Yongguo Shi Ping Zhao Yao Li Yong Wang Yindong Zhang Tangao Hu |
| author_facet | Chaohui Chen Hao Hou Yongguo Shi Ping Zhao Yao Li Yong Wang Yindong Zhang Tangao Hu |
| author_sort | Chaohui Chen |
| collection | DOAJ |
| description | As urbanization accelerates and urban hydrological cycles evolve, roof typology emerges as a pivotal role in water retention capacity and drainage efficiency. To systematically evaluate the influence of various roof types on urban hydrological processes, this study designed four distinct catchment scenarios: Thiessen Polygon Scenarios (TS), Roof Type Consideration Scenarios (RS), Full Flat-Roof Scenarios (FS), and Full Pitched-Roof Scenarios (PS). This study employed the Urban Flood Intelligent Model (UFIM) to simulate urban flooding scenarios, utilizing precipitation data from 21 August 2024 combined with four distinct return periods (1a, 5a, 10a, and 20a) as hydrological inputs. The results show that roof types significantly affected hydrological processes in urban communities. Flat roofs accumulate water and drain slowly, making it easy to form larger areas of accumulated water during peak rainfall periods, thereby increasing the risk of urban flooding. Pitched roofs drain quickly but experience a brief rise in water level during peak hours due to rapid drainage. Based on these insights, priority should be given to the use of sloped roof design in areas prone to accumulated water to accelerate drainage. In areas requiring runoff mitigation, the strategic integration of flat roofs with green roofs enhances rainwater retention capacity, thereby optimizing urban hydrological regulation and bolstering flood resilience. |
| format | Article |
| id | doaj-art-407f51e9f185485daa3be0b1de5b975b |
| institution | OA Journals |
| issn | 2306-5338 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Hydrology |
| spelling | doaj-art-407f51e9f185485daa3be0b1de5b975b2025-08-20T02:20:57ZengMDPI AGHydrology2306-53382025-06-0112615410.3390/hydrology12060154Impact of Different Building Roof Types on Hydrological Processes at the Urban Community ScaleChaohui Chen0Hao Hou1Yongguo Shi2Ping Zhao3Yao Li4Yong Wang5Yindong Zhang6Tangao Hu7Zhejiang Provincial Key Laboratory of Wetland Intelligent Monitoring and Ecological Restoration, Hangzhou Normal University, Hangzhou 311121, ChinaZhejiang Provincial Key Laboratory of Wetland Intelligent Monitoring and Ecological Restoration, Hangzhou Normal University, Hangzhou 311121, ChinaZhejiang Academy of Emergency Management Science, Hangzhou 310061, ChinaZhejiang Urban and Rural Planning and Design Research Institute, Hangzhou 310007, ChinaFaculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7500 AE Enschede, The NetherlandsZhejiang Urban and Rural Planning and Design Research Institute, Hangzhou 310007, ChinaZhejiang Academy of Emergency Management Science, Hangzhou 310061, ChinaZhejiang Provincial Key Laboratory of Wetland Intelligent Monitoring and Ecological Restoration, Hangzhou Normal University, Hangzhou 311121, ChinaAs urbanization accelerates and urban hydrological cycles evolve, roof typology emerges as a pivotal role in water retention capacity and drainage efficiency. To systematically evaluate the influence of various roof types on urban hydrological processes, this study designed four distinct catchment scenarios: Thiessen Polygon Scenarios (TS), Roof Type Consideration Scenarios (RS), Full Flat-Roof Scenarios (FS), and Full Pitched-Roof Scenarios (PS). This study employed the Urban Flood Intelligent Model (UFIM) to simulate urban flooding scenarios, utilizing precipitation data from 21 August 2024 combined with four distinct return periods (1a, 5a, 10a, and 20a) as hydrological inputs. The results show that roof types significantly affected hydrological processes in urban communities. Flat roofs accumulate water and drain slowly, making it easy to form larger areas of accumulated water during peak rainfall periods, thereby increasing the risk of urban flooding. Pitched roofs drain quickly but experience a brief rise in water level during peak hours due to rapid drainage. Based on these insights, priority should be given to the use of sloped roof design in areas prone to accumulated water to accelerate drainage. In areas requiring runoff mitigation, the strategic integration of flat roofs with green roofs enhances rainwater retention capacity, thereby optimizing urban hydrological regulation and bolstering flood resilience.https://www.mdpi.com/2306-5338/12/6/154urban hydrologystormwater runoffdrainage systemroof typeUFIM |
| spellingShingle | Chaohui Chen Hao Hou Yongguo Shi Ping Zhao Yao Li Yong Wang Yindong Zhang Tangao Hu Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale Hydrology urban hydrology stormwater runoff drainage system roof type UFIM |
| title | Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale |
| title_full | Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale |
| title_fullStr | Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale |
| title_full_unstemmed | Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale |
| title_short | Impact of Different Building Roof Types on Hydrological Processes at the Urban Community Scale |
| title_sort | impact of different building roof types on hydrological processes at the urban community scale |
| topic | urban hydrology stormwater runoff drainage system roof type UFIM |
| url | https://www.mdpi.com/2306-5338/12/6/154 |
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