Innovative Monitoring, Analysis Technologies, and Management Strategies for Mitigation of Land Subsidence

Project Details


The pumping-induced land subsidence generally exists in an aquifer that is created by lake or river surficial deposit processes. Such aquifer generally includes fine materials that are relatively highly compressible. Previous investigations have indicated that the long-term trend of a land subsidence area reveals the irreversible situation for the aquifer deformations even if the amount of the pump water are significantly reduced or stopped. Therefore, the effective and accurate predictions of land subsidence mechanisms are key references for future water resource managements and homeland security planning. The studies of land subsidence are multidisciplinary sciences. The problems of land subsidence at specific locations depend on multiple factors, including hydrogeological conditions, social-economic conditions, and most importantly, the behavior of local groundwater use in the subsidence areas. In addition to accurate monitoring data, the understanding of interactions between groundwater flow and soil compaction/consolidation, the detail processes of groundwater flow and subsidence simulations, and the accurate estimations of flow and compaction parameters are important factors to develop accurate and reliable technologies for land subsidence analyses. Motivated by the requirements for such key issues for land subsidence analysis, we proposed an integrated project “Innovative monitoring, analysis technologies, and management strategies for mitigation of land subsidence” that aims to use innovated monitoring, experiment, and modeling techniques to characterize the subsidence mechanism and the associated stresses in the severe land subsidence areas in Yunlin county in western central Taiwan. The results of the study are expected to provide long-term and high spatial and temporal resolution of land subsidence history in the study areas. The developed models aim to reconstruct the migration behavior of the subsidence center and clarify the key stresses induced by local water users. Additionally, the developed monitoring and model techniques are expected to quantify regional inflow and outflow of the aquifer system and quantify the impact of land subsidence on the secondary hazards such as flooding, seawater intrusion, and local agriculture and economic losses. How the influence of positive actions such as reduced pumping, artificial recharge, and industrial transformation on the mitigation of land subsidence will be systematically discussed in the study. The results of the study can be important references for planning the management strategies of land subsidence areas in Taiwan.
Effective start/end date1/08/2031/07/21

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 6 - Clean Water and Sanitation
  • SDG 15 - Life on Land
  • SDG 17 - Partnerships for the Goals


  • land subsidence
  • soil consolidation
  • aquifer
  • remote sensing
  • numerical modeling
  • seawater intrusion
  • artificial recharge


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