Analysis on mode change and landscape pattern of the Dike-pond agriculture in Zhongshan

Zhongshan was taken as a case study area and the Dike-pond ecological agricultural development model was reviewed. Based on the interpretation of Landsat-TM data (with three digital images taken in 1990, 2000 and 2013, respectively) and GIS technology, dynamic changes of Dike-pond land landscape types were attained and some landscape pattern indices were computed and analyzed. The results showed that traditional Dike -pond agricultural pattern was gradually disappearing with great change of Dike-pond爷s planting and cultivating patterns, also with significant changes of Dike-pond爷s proportion in space structure. The main performance was heavy pond light base冶, which attached great importance to the fish pond aquaculture while despised dike planting. The Dike-pond land changed greatly with the trend of first increasing and then decreasing, which increased from 324.69 km2 in 1990 to 476.56 km2 in 2000 and reduced to 424.58 km2 in 2013. Landscape pattern analysis showed that the fragmentation of Dike -pond land reduced and the polymerization rose, which was the result renovated and planed by Dike-pond land.