For this project, we will use and develop geodesy and remote sensing methods to monitor and forecast land-height change and coastal inundation in Southeast Asia.
Flooding that coastal cities will experience can occur either because the sea surface rises or because the land sinks. Estimating accurate rates of relative sea-level rise requires knowing how both sea surface and land height are changing. In this project, we will use measurements from satellites to monitor where, and how quickly, the land is sinking in Southeast Asia’s coastal cities.
In addition, we will map land heights in Southeast Asia and combine this map with our estimates of land-height change and new estimates of climate-related sea-surface change to forecast which areas will become flooded. We will also develop new innovative ways to use satellite data to monitor coastal flooding and the changing shapes of coastlines due to sea-level rise.
This animation illustrates how land subsidence and rising sea-levels both lead to relative sea-level rise. (Source: Phuong Nguyen/Earth Observatory of Singapore)
The animation illustrates a few uses of the Global Positioning System (GPS): measuring changes in land height, sea level, and estimating the amount of water vapour in the air. GPS is one of a few Global Navigation Satellite Systems (GNSS) that send positioning, navigation, and timing data to receivers (Source: Phuong Nguyen/Earth Observatory of Singapore)
Director, Remote Sensing Lab
Cheryl TAY Wen Jing
Jay WONG Cai Jie
27 Jun 2022
Why are cities in Southeast Asia sinking?
Gopika Suresh, Federal Agency for Cartography and Geodesy (BKG), Germany
Eric Lindsey, University of New Mexico, USA
Chew Lock Yue, SPMS, NTU, Singapore
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