Spatial-temporal Change of Sanshui districts Dike-pond from 1979-2009
Dike-pond is a representative style of ecological agriculture in the PRD(Pearl River Delta). Since 1992, Guangdong quicken its pace of reform and opening-up to the outside world. A mass of factories had been built in the PRD. The dike-ponds have come across some influential changes in the recent 30 years. To detect and study on the changes of dikeponds, the Remote Sensing and Geography Information System skill was applied in this paper. This article selected Sanshui district as an example and used Landsat TM 1979, 1990, 2000 and SPOT 2009 satellite image as the major data sources. With the help of ITTVIS company newly released software-ENVI EX, object-oriented approach has been used to extract the dike-pond land from each image. The result indicates that the area of dike-pond gained rapidly growth from 1979 to 2000, but decrease critically during 20002009. When using Change Detection Analysis to compute each periods change statistics, the result shown that the increased dike-pond area were mainly from vegetation covered land and other bare land. Then we found out that the mean centre of Sanshui districts dike-pond was moving from northwest to southeast during 1979-2009. Therefore, it comes to the conclusion that Sanshui districts dike-pond increased across the southeast of Sanshui district from 1979 to 2009. Last but not least, some suggestions have been put forward to keep the dikepond land area from decreasing.
dike-pond object-oriented approach spatial-temporal change Sanshui district
Jiaxing Liu Jianfei Chen Xiaoxuan Wang
School of Geographical Sciences Guangzhou University Guangzhou, 510006, China
国际会议
深圳
英文
133-136
2010-11-20（万方平台首次上网日期，不代表论文的发表时间）