A monitoring system is used to measure sediment accretion, and to monitor the condition of the T-fences. In addition, natural regeneration of mangroves is monitored. During the first year after construction, functionality of the T-fences should be ensured through monthly visual inspections and maintenance where necessary. After one year, visual inspections and maintenance should be carried out at least after the end of every storm season. In addition, seasonal GPS surveys of the shore line at low tide can be used to see whether the T-fences have impacts on the shape of the coastline nearby. The natural regeneration of mangroves is documented by recording species, size and density or through fixed-point photos. The latter can also be used as a simple alternative for GPS shore line surveys.