Abstract: Under the status of trace settlement and higher urban security fortification, sea-level rise, due to global warming, must be considered for the control of land subsidence in Shanghai. In this paper, sea-level rise was taken as one of considerations for land subsidence control in Shanghai. Based on the monitoring results of flood-control project settlement and regional land subsidence, as well as sea-level rise impact on defense capability of flood prevention walls, it was found that regional land subsidence had a significant effect on flood-control project settlement, and the superposition of ground settlement. Sea-level rise would further reduce drainage capacity of urban flood or tide prevention projects. Then the control strategies were proposed, such as monitoring and early-warning mechanism for major public constructions, zoning control in different regions, better utilization and management for groundwater resources, improving networks for monitoring land subsidence.

Key words: land subsidence, sea-level rise, urban safety, flood-control and drainage, control strategy