The salt farm area increased by 27% between 2004 and 2007 and this was mostly found in the allowable areas of Zones 2 and 3 while a small area of 0.6 km2 was in the restricted area of Zone 1 Aquaculture areas expanded by 1.6% during 2002-2004, and continued to increase to 6% from 2004 to 2007. Activities that damaged mangrove forests, agricultural areas and fishery resources occurred throughout. This study illustrated that the expansion of salt farms and white leg shrimp farming are the main activities invading agricultural areas. Mangrove forest decreased by 1.5%, changing to aquaculture and some eroded during 2002-2004, but after 2004 its area increased by 0.3% or 9 ha from mangrove replanting in most areas of Zone 2 and part of Zone 1. Mangrove areas in Zone 3, 4 and 5 were constant.