Abstract:

It is important to monitor distribution and analyze dynamic change of lakes in Jiangsu Province for wise use and protection of water resources. In this study, the lakes in Jiangsu province were monitored using multi-temporal Landsat TM/ETM+ images and HJCCD images of 2000, 2005 and 2010 and the objectoriented classification method, and the decadal dynamic change and diving forces were analyzed. The results showed that the lake area in Jiangsu Province was 5 90223 km2 in 2000, 5 89191 km2 in 2005 and 5 88319 km2 in 2010, respectively. The total lake areas of Jiangsu province were relatively stable, but several lakes were change obviously. The changes of the Hongze Lake and the Baima Lake were the most obvious. Changes of the Hongze Lake mainly took place in the southwest, the increasing part was mainly located in the west of Siyang County, the decreasing part was mainly distributed at the junction of Sihong County and Hongze County. While changes of the Baima Lake took place in the southwest to Northeast, transferred was mainly located in eastern Huaian and Northern Suqian; decrease was located in Suqian City, Hongze County area. Transfer types were mainly concentrated between the wetland and farmland. By analyzing the driving force of the natural and human factors, the results showed that rising temperatures, decreasing precipitation in the surrounding areas and the reduce of water in the Hongze Lake and the Baima Lake were the main natural factors leading to lake reducing during the 10 years. The AWMPFD (AreaWeighted Patch Fractal Dimension) of the Hongze Lake changed little, from 1161 in 2000, 1162 in 2005 to 1159 in 2010. In addition, the AWMPFD in the Baima Lake continued to decline from 1275 in 2000, 1240 in 2005 to 1211 in 2010. Therefore, human activities around the lake and the change of land use are important factors causing atrophy of the lakes. The land cover changed in the Hongze Lake and the Baima Lake in the ten years. Wetland area continued to decline, mainly due to reclamation into cultivated land. Cultivated area increased, because wetlands were transferred to farmland