Improved Monitoring of Land Subsidence towards Quantifying Relative Sea-Level Rise Hazards in the Low-Lying Deltas

Project Details


Sea-level rise (SLR), widely recognized as one of consequences resulting from anthropogenic climate change, has induced substantial coastal vulnerability in many populated deltas worldwide, such as three densely populated regions in Asia: Bangladesh, Mekong, and Yangtze deltas. The relative SLR (RSLR), combining eustatic/regional SLR with severe land subsidence due to fluvial sediment loading and anthropogenic extraction of ground water, have significantly exacerbate the coastal vulnerability of these deltas. The topographic surfaces of land and ocean have been measured individually worldwide from space, while several global products are available from multiple agencies. However, the accurate link between both spatially varying quantities remains elusive. The uncertain estimates of land deformation and inundation areas, which base on the biased topography and ocean surface models, would eventually lead to an inadequate assessment of coastal vulnerability. Our objective is to improve the understanding of the relative position between ocean and low-lying lands and their interactions that govern coastal vulnerability. The linkage is essential to deciphering the factors to address long-term sustainability in these three populous deltas.
Effective start/end date1/08/1831/07/19

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 13 - Climate Action
  • SDG 14 - Life Below Water
  • SDG 17 - Partnerships for the Goals


  • Asian deltas
  • land subsidence
  • relative sea level rise
  • flooding hazard


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