基于专家分类器的洪泽湖湿地变化分析

Change Study of Hongze Lake Wetland Based on Knowledge Engineer

利用1989年、1995年、2000年和2009年4期洪泽湖地区的TM图像,基于专家分类器从光谱和空间特征多方面制定规则,分析遥感影像上洪泽湖湿地及湿地内部各种类型的分布和变化.研究结果表明:①用专家分类器可以更好的提取出洪泽湖湿地及湿地内部耕地、养殖场、湿地植被和敞水区等分布及其变化;②在研究期内,洪泽湖湿地面积总体上呈现一种先降后升的趋势.1989-2009年间洪泽湖湿地内的耕地和养殖场的面积分别增加了3.40倍和2.64倍,湿地植被和水体面积在研究期间分别减少了18%和15%.

Using the TM images of 1989, 1995, 2000 and 2009 in Hongze Lake, this paper extracts the distribution and analyses the change of Hongze Lake based on Knowledge Engineer from the features of spatial and spectral. The results showed： ①Knowledge Engineer is a good method by extracting wetland, cultivated land, aquiculture farm, wetland vegetable and water; ②In the study period, the whole area of Hongze Lake Wetland shaved the trend of first increased and then de- creased. During the 1989--2009, the area of cultivated land and aquiculture farm on Hongze Lake were respectively increased 3.4 times and 2.64 times. And the area of wetland vegetable and water were respectively decreased by 18% and 15%.