Abstract
Built-up land in floodplains (BLF) is a vital indicator of the socio-hydrological system, and its dynamics are key to understanding and managing flood risk. However, previous studies have neglected the impacts of BLF growth modes (e.g., patch sizes and expansion types) on flood vulnerability. This paper fills this gap by assessing the BLF's growth modes and revealing their divergent impacts on flood vulnerability using a case study in the Yangtze River Economic Belt (YREB), China. The results show that the BLF has nearly doubled in the YREB during 1990–2014. A considerable proportion (35.43%) of the BLF growth is scattered in small patches (≤1 km2), which have a much stronger correlation with flood occurrence than that of the other patch sizes. In terms of expansion types, the edge-expansion type dominates 57.52% of the BLF growth, followed by the leapfrogging and infilling expansions. Both the leapfrogging and the edge-expanding BLFs are significantly associated with flood occurrence, while the infilling type is not. The patch size and expansion type can thus influence the vulnerability of BLF patches, which is also supported by real-world cases. These findings enrich a general understanding of BLF growth and its impacts on flood vulnerability. The scientific community and policymakers should pay attention to not only the quantity of BLF growth, but also its spatial arrangement.
Original language | English |
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Article number | 134462 |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Science of the Total Environment |
Volume | 700 |
Early online date | 4 Oct 2019 |
DOIs | |
Publication status | Published - 15 Jan 2020 |
Funding
This research was funded by the National Natural Science Foundation of China (Grant Nos. 41730642 , 41871200 , 51761135024 ), the National Social Science Fund of China ( 17ZDA058 ), and the National Key Research and Development Program of China ( 2017YFC1503001 ). We are grateful to the anonymous reviewers and editors for their valuable comments and suggestions to enhance this study. Appendix A
Funders | Funder number |
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National Natural Science Foundation of China | 41730642, 51761135024, 41871200 |
National Natural Science Foundation of China | |
National Basic Research Program of China (973 Program) | 2017YFC1503001 |
National Basic Research Program of China (973 Program) | |
National Office for Philosophy and Social Sciences | 17ZDA058 |
National Office for Philosophy and Social Sciences |
Keywords
- Flood risk management
- Nature-based adaptation
- Socio-hydrology
- Urban planning
- Urban sustainability