Analysis of spatial-tempo features of land use of Bohai Sea sealine buffer zones in the recent Yellow River Delta

Regional land use/land cover change is an important part of global change.The objective of this research was to identify land use and landscape pattern change(LULPC) in Bohai Sea sealine buffer zone(3 km). LULPC of the sealine buffer zone in the past 15 years was investigated through land use/land cover classification of three sets of Landsat TM images aquired on June 5, 1986, May 30, 1996 and May 4, 2001, respectively. Nine land cover types were recognized,including water areas, Phragmites, woodland, cultivation land, Tamarix chinensis-Phragmites, construction land, Tamarix chinensis, Suarda heteroptera Aeluropus littoralis Var. Sinensis Tamarix chinensis, mud flat. Based on digital land cover maps of 1986, 1996, 2001, the land cover and landscape pattern change(LCLPC) were studied, in macro-scale, exerting ARC/INFO and landscape ecology method. The conclusions are given as follows: In space land use degree comprehensive index increased with distance to Bohai Sea sealine in 1986 and 2001, and both had the linear relationship. While in 1996 land degree comprehensive index of Bohai Sea sealine buffer zones did not change dramatically with distance to Bohai Sea sealine. In time land degree comprehensive index increased from 1986 to 1996, from 1996 to 2001. Other landscape pattern indexes had no relationship with the distance to the Bohai sealine except dominance index.