Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China
Urban expansion leads to surface changes that disrupt hydrological processes and increases flooding risks in cities. This increase may be severe in urban megaregions where clusters of cites have agglomerated. The China Ecological Redline Policy (ERP) is a national policy that protects priority areas...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/abb4ff |
| _version_ | 1827870335417974784 |
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| author | Xinhui Ju Weifeng Li Liang He Junran Li Lijian Han Jingqiao Mao |
| author_facet | Xinhui Ju Weifeng Li Liang He Junran Li Lijian Han Jingqiao Mao |
| author_sort | Xinhui Ju |
| collection | DOAJ |
| description | Urban expansion leads to surface changes that disrupt hydrological processes and increases flooding risks in cities. This increase may be severe in urban megaregions where clusters of cites have agglomerated. The China Ecological Redline Policy (ERP) is a national policy that protects priority areas with high-value ecosystem services. However, it is not clear how the ERP alters megaregion expansion and what this means for surface runoff across entire regions. By integrating specified models, we developed future urban expansion scenarios for 2030 with and without the ERP in the Chinese Beijing-Tianjin-Hebei (BTH) megaregion. The annual surface runoff volume under the ERP scenario decreased by 78 million m ^3 compared to the non-ERP involved scenario, but the ERP effectiveness at surface runoff regulation was different between the ecological redline areas (ERAs) and the non-ERAs. This suggested that multi-solutions should be incorporated into megaregions, such as regional ERPs and local, nature-based solutions, which could efficiently reduce the risk of urban flooding across whole regions. |
| first_indexed | 2024-03-12T15:55:23Z |
| format | Article |
| id | doaj.art-1026fef3dcf445f8899cc1fb43e06a9d |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:55:23Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-1026fef3dcf445f8899cc1fb43e06a9d2023-08-09T14:55:33ZengIOP PublishingEnvironmental Research Letters1748-93262020-01-0115101040b110.1088/1748-9326/abb4ffEcological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of ChinaXinhui Ju0Weifeng Li1https://orcid.org/0000-0003-1212-4345Liang He2Junran Li3Lijian Han4Jingqiao Mao5College of Water Conservancy and Hydropower Engineering, Hohai University , Nanjing 210098, People’s Republic of ChinaState Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, People’s Republic of ChinaUrumqi Natural Resources Comprehensive Survey Center of China Geological Survey , Urumchi 830057, People’s Republic of ChinaDepartment of Geosciences, The University of Tulsa , Tulsa, OK 74104, United States of AmericaState Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, People’s Republic of ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University , Nanjing 210098, People’s Republic of ChinaUrban expansion leads to surface changes that disrupt hydrological processes and increases flooding risks in cities. This increase may be severe in urban megaregions where clusters of cites have agglomerated. The China Ecological Redline Policy (ERP) is a national policy that protects priority areas with high-value ecosystem services. However, it is not clear how the ERP alters megaregion expansion and what this means for surface runoff across entire regions. By integrating specified models, we developed future urban expansion scenarios for 2030 with and without the ERP in the Chinese Beijing-Tianjin-Hebei (BTH) megaregion. The annual surface runoff volume under the ERP scenario decreased by 78 million m ^3 compared to the non-ERP involved scenario, but the ERP effectiveness at surface runoff regulation was different between the ecological redline areas (ERAs) and the non-ERAs. This suggested that multi-solutions should be incorporated into megaregions, such as regional ERPs and local, nature-based solutions, which could efficiently reduce the risk of urban flooding across whole regions.https://doi.org/10.1088/1748-9326/abb4ffecological protection redlinesurface runoffCLUE-S modelL-THIA modelurban agglomeration |
| spellingShingle | Xinhui Ju Weifeng Li Liang He Junran Li Lijian Han Jingqiao Mao Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China Environmental Research Letters ecological protection redline surface runoff CLUE-S model L-THIA model urban agglomeration |
| title | Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China |
| title_full | Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China |
| title_fullStr | Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China |
| title_full_unstemmed | Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China |
| title_short | Ecological redline policy may significantly alter urban expansion and affect surface runoff in the Beijing-Tianjin-Hebei megaregion of China |
| title_sort | ecological redline policy may significantly alter urban expansion and affect surface runoff in the beijing tianjin hebei megaregion of china |
| topic | ecological protection redline surface runoff CLUE-S model L-THIA model urban agglomeration |
| url | https://doi.org/10.1088/1748-9326/abb4ff |
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