Temporal And Spatial Changes Of Landscape Ecological Pattern In Reclamation Area Of Cixi Section Of Hangzhou Bay

This paper selects the coastal beach in Cixi as the research area.The coastline changes and landscape evolution process caused by the coast beach reclamation project in Cixi in the past 20 years,were analyzed based on remote sensing data.Some indicators were also selected to evaluate the impact of coast beach reclamation on the regional environment.The main results of the paper are as follows:(1)During the period of 1997-2015,the coast beach reclamation region of Cixi mainly consists of aquaculture land and new tidal flats,the reclamation area was converted to construction land and cultivated land.The implementation of various large-scale planning projects has formed a stable distribution pattern of various landscapes.The northeast,central and southwestern parts of the study area are large areas of cultivated land and aquaculture.On both sides of the central cultivated land,two pieces of concentrated construction land are distributed,forming "Cultivated land-construction land-cultivated land-construction land-cultivated land" interval distribution pattern;(2)During the study period,the tidal flat is always the largest and most widely distributed landscape type in the study area.The cultivated land,river channel and artificial surface are the largest in terms of boundary length and density,and have a dominant position in the landscape pattern of the study area.The number of patches increased sharply,the area of rivers,cultivated land and artificial surface has increased greatly,the landscape heterogeneity also increased,and the dominant landscape effect has gradually weakened.The artificial surface has become a dominant landscape in the study area.Meanwhile,the fragmentation of the study area has been increasing,mainly because the cultivated land and artificial surface are severely divided by rivers and roads;(3)The driving factors are mainly including natural factors and artificial factors.Coast beach reclamation is the most important factor influencing the landscape of the study area.At the same time,the urban planning of the reclamation region is the determinant of the landscape type and change of the study area.