Articles | Volume 29, issue 8
https://doi.org/10.5194/hess-29-2109-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-2109-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
28 Apr 2025
Research article |
| 28 Apr 2025
| 28 Apr 2025
Evaluating the effects of topography and land use change on hydrological signatures: a comparative study of two adjacent watersheds
Haifan Liu
Department of Civil Engineering, University of Hong Kong, Hong Kong SAR, China
Haochen Yan
Department of Civil Engineering, University of Hong Kong, Hong Kong SAR, China
Department of Civil Engineering, University of Hong Kong, Hong Kong SAR, China
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Nat. Hazards Earth Syst. Sci., 22, 2567–2588, https://doi.org/10.5194/nhess-22-2567-2022, https://doi.org/10.5194/nhess-22-2567-2022, 2022
Short summary
Short summary
Sustainable flood risk management (SFRM) has become popular since the 1980s. This study examines the past and present flood management experiences in four developed countries (UK, the Netherlands, USA, and Japan) that have frequently suffered floods. We analysed ways towards SFRM among Asian coastal cities, which are still reliant on a hard-engineering approach that is insufficient to reduce future flood risk. We recommend stakeholders adopt mixed options to undertake SFRM practices.
Kaihua Guo, Mingfu Guan, Haochen Yan, and Faith Ka Shun Chan
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2022-109, https://doi.org/10.5194/nhess-2022-109, 2022
Revised manuscript not accepted
Short summary
Short summary
This study investigated the utility of social media in urban flood assessment using the case of 2020 China Chengdu flooding. We presented an efficient workflow to collect, process and identify unstructured flood related data in near real-time during a storm event. Based on identified social media database and 232 flood sites, this study shows that social media data can provide valuable spatial and timely information for urban flooding emergency management.
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Short summary
Land changes and landscape features critically impact water systems. Studying two watersheds in China’s Greater Bay Area, we found slope strongly influences water processes in mountainous areas. However, this relationship is weak in the lower regions of steeper watersheds. Urbanization leads to an increase in annual surface runoff, while flatter watersheds exhibit a buffering capacity against this effect. However, this buffering capacity diminishes with increasing annual rainfall intensity.
Land changes and landscape features critically impact water systems. Studying two watersheds in...
