Land use change in coastal zone of Bohai sea in last 30 years

Aimed to make out land use change and its spatial differences in coastal zone of Bohai sea in last 30 years. Series satellite remote sensing images obtained in 1988, 1998 and 2007 were employed to surveyed land use change integrated field surveying. Some land use index such as land use dominant type, land use dominant index and land use intensity index were created to describe main land use function, its dominance and regional land use intensity, individually. Then the land use change and its spatial differences in 1980s, 1990s and 2000s was assessment. The result as follow: Regional differences of land use and its change was more and more with land exploitation and use process carried forward. This process expressed by shrink of coastal beach and swamp, while expansion of building area and fish pool. And transform of land use dominant type from coast beach, swamp and salt lake (low intensity types) in 1980s to building are, fish pool(high intensity type) in 2000s. While Land use diversity increased and dominant index of individual land use type reduced. Land use intensity index boasted famous in coastal zone of Binzhou, coastal zone of Panjin and coastal zone of Dongying. Land use construction reformed to grow regional differences in spatially, such as agriculture zone in coast of Huludao and Yantai, fish pool zone in coast of Cangzhou, salt lake zone in coast of Weifang and Binzhou, eatarine wetland conservation zong in coast of Dongying and Panjin.