The amount of settlement at the measuring points(2 island)

Subsidence Conditions at Monitoring Points

A table detailing observed data on land subsidence. The rows list the survey dates from July 1999 to December 2024 for each measurement point. The figures in the table are values of the cumulative amount of subsidence from the reference date. They show an increasing trend over time. The progress of subsidence at each measurement point over a long period of time is recorded in detail in the data table. Measurement points shown in this image are CB11-C, CB4-C, A-8, B-8, C-8, D-8, A-7, B-7, C-7, D-7, and A-6.

A table detailing observed data on land subsidence. The rows list the survey dates from July 1999 to December 2024 for each measurement point. The figures in the table are values of the cumulative amount of subsidence from the reference date. They show an increasing trend over time. The progress of subsidence at each measurement point over a long period of time is recorded in detail in the data table. Measurement points shown in this image are B-6, C-6, D-6, CB13-C, A-5, B-5, C-5, D-5, CB3-C, A-4, and B-4.

A table detailing observed data on land subsidence. The rows list the survey dates from July 1999 to December 2024 for each measurement point. The figures in the table are values of the cumulative amount of subsidence from the reference date. They show an increasing trend over time. The progress of subsidence at each measurement point over a long period of time is recorded in detail in the data table. Measurement points shown in this image are C-4, D-4, A-3, B-3, C-3, D-3, CB14-C, CB2-C, A-2, B-2, and C-2.

A table detailing observed data on land subsidence. The rows list the survey dates from July 1999 to December 2024 for each measurement point. The figures in the table are values of the cumulative amount of subsidence from the reference date. They show an increasing trend over time. The progress of subsidence at each measurement point over a long period of time is recorded in detail in the data table. Measurement points shown in this image are D-2, CB1-4, A-1, B-1, C-1, D-1, CB15-C, CB19-C, CB18-C, and CB17-C.

Measured settlement at settlement monitoring points

Value estimated due to lack of measurement

Settlement per year

A bar graph showing annual change in subsidence, with the y-axis representing subsidence over one year (cm/year) and the x-axis representing the period from 1994 to 2024. The graph visualizes that the subsidence rate, which was 50 cm per year in 1994, has rapidly decreased each year and has remained stable at a low level of less than 10 cm per year since 2007.

Settlement per year

Technical Initiatives (Related Links)