Determination of amount of land subsidence based on INSAR and LiDAR monitoring for a dike strengthening project

de Koning, Michel; Haasnoot, Jacco K.; van Buuren, Rob R.; Weijland, Marco; Bisschop, Cor

For the dike strengthening project Krachtige IJsseldijken Krimpenerwaard (KIJK) a study has been undertaken to optimize the amount of land subsidence. Based on archive information originally a subsidence rate of 11 mm yrinline-formula−1 is used in the design calculations. This means that for a 50-year period an additional 0.55 m must be considered which does not comply with the macro-stability problems of the dike. Based on INSAR and LiDAR measurement data and reanalysing the archive data, the rate of subsidence is determined at an average of 8 mm yrinline-formula−1. This could mean a reduction of 27 % on the amount of soil needed to balance subsidence.

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de Koning, Michel / Haasnoot, Jacco K. / van Buuren, Rob R. / et al: Determination of amount of land subsidence based on INSAR and LiDAR monitoring for a dike strengthening project. 2020. Copernicus Publications.

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