Abstract:

Based on TM (30m) data in 1987,1995,2000 and 2006,the characteristics and comprehensive evaluation of land use dynamics of different reclamation time on the northern Hangzhou Bay were analyzed with the method of spatial sere substituting for time sere and Principal Component Analysis (PCA).A comprehensive evaluation model of land use dynamics in the study has been established and verified with land use change data of Nanhui reclamation zones.Conclusions showed:(1) Land use level comprehensive index (L) tended to linearly increase （〖WTBX〗R2〖WTBZ〗=0457 7）with the increase of reclamation time. Land use diversity (GM) also tended to increase,and reached a steady state between 35 and 40 years.(2) Change of agricultural land positively correlated with the comprehensive evaluation index（paddy field>greenhouse>farm land>forest>orchard）,while nature dominated land types (breeding pond>grass land>open water>mud flat) negatively correlated with the Fvalue.(3) Fvalue tended to increase (〖WTBX〗R2=0.511 9〖WTBZ〗) with the increase of reclamation time,and reached a steady state after about 40 years of reclamation.Regression analysis showed that Fvalue reflected the information of land use degree index (L) and diversity index (GM) well.(4) Land use dynamic was impacted by following driving force factors:anthropological factors>natural factors