Bian et al. (2026) Assessing coastal flooding risk in newly reclaimed areas under the influence of relative sea level rise and multiple drivers

Identification

• Journal: Geomatics Natural Hazards and Risk
• Year: 2026
• Date: 2026-09-24
• Authors: Wanchao Bian, Jiayi FANG, Bin Xie, Yahui Qin, Shengli Tao, Zurui Ao, Yangyang Yang, Jinzhuo Xiang, Junfeng Xu, Tangao Hu
• DOI: 10.1080/19475705.2026.2731680

Research Groups

• Institute of Remote Sensing and Earth Sciences, Hangzhou Normal University
• Zhejiang Provincial Key Laboratory of Wetland Intelligent Monitoring and Ecological Restoration
• Institute of Ecology, College of Urban and Environmental Sciences, Peking University
• State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Peking University
• Beidou Research Institute, Faculty of Engineering, South China Normal University

Short Summary

This study assesses coastal flooding risk in newly reclaimed areas under the influence of relative sea level rise and multiple drivers. The research integrates InSAR-derived land subsidence and the LISFLOOD-FP hydrodynamic model to simulate high-resolution coastal flooding for historical and future scenarios.

Objective

• Investigate how reclamation-induced exposure change, subsidence-driven relative sea-level rise, and defence conditions jointly affect flood inundation and economic loss in newly reclaimed coastal areas.
• Assess the impact of land subsidence on coastal flooding risk in Longgang City, Wenzhou, China.

Study Configuration

• Spatial Scale: Local scale (Longgang City, Wenzhou, China)
• Temporal Scale: Historical (2005), present-day (2020), and future scenarios (2050 and 2100)

Methodology and Data

• Models used: LISFLOOD-FP hydrodynamic model
• Data sources:
  • InSAR-derived land subsidence data
  • Copernicus Digital Elevation Model (COP-DEM)
  • Land cover data from the first global 30 m land cover time-series dynamic remote sensing product (GLC_FCS30D)
  • Coastal protection data from field investigation and urban planning reports

Main Results

• Coastal reclamation leads to a 26% increase in the inundated area from coastal flooding.
• The extent and depth of inundation are projected to increase with ongoing land subsidence and higher-emission climate scenarios.
• Land subsidence continues, the depth of flood inundation is also expected to increase.

Contributions

• This study provides an integrated assessment of how multiple drivers jointly shape coastal flood risk in newly reclaimed areas.
• The research highlights the need for subsidence control, adaptive seawall upgrading, and risk-sensitive land-use planning in reclaimed coastal zones.

Funding

• Not specified

Citation

@article{Bian2026Assessing,
  author = {Bian, Wanchao and FANG, Jiayi and Xie, Bin and Qin, Yahui and Tao, Shengli and Ao, Zurui and Yang, Yangyang and Xiang, Jinzhuo and Xu, Junfeng and Hu, Tangao},
  title = {Assessing coastal flooding risk in newly reclaimed areas under the influence of relative sea level rise and multiple drivers},
  journal = {Geomatics Natural Hazards and Risk},
  year = {2026},
  doi = {10.1080/19475705.2026.2731680},
  url = {https://doi.org/10.1080/19475705.2026.2731680}
}