The Groundwater Budget and Subsidence Risk in Taipei Basin, Taiwan, from Remote Sensing and Numerical Modelling

• Applicant: Professor Dr. Mahdi Motagh
• Subject Area: Geodesy, Photogrammetry, Remote Sensing, Geoinformatics, Cartography ; Geophysics
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 528466037

As an economic central of Taiwan, the Taipei Basin suffers from severe subsidence resulting from excessive groundwater pumping. Monitoring of ground surface displacement and assessing the response of an aquifer system to changes in the groundwater content is of key importance in assessing the risk of subsidence to infrastructures, and in developing effective management strategy for groundwater resources. In this proposal, we aim to develop a multi-scale and multi-sensor remote sensing-based approach using the integration of by now state-of-the-art satellite EO data, in-situ observations and advanced numerical modelling to characterize basin-scaled subsidence and groundwater budget in the Taipei basin. Multi-temporal Interferometric (MTI) measurements will be exploited to characterize deformation induced by fluctuations of ground water level in the Taipei basin. The results are then integrated with other hydrogeological and in-situ measurements for cause-effect analysis and subsidence risk zonation. Finally, a numerical model will be developed to simulate groundwater flow and assess effective-stress due to groundwater level fluctuation in Taipei.

• DFG Programme: Research Grants
• International Connection: Taiwan
• Partner Organisation: National Science and Technology Council (NSTC)
• Cooperation Partners: Professor Dr. Jyr-Ching HU; Dr. Hsin Tung