【摘要】 辉河湿地作为内蒙古辉河国家级自然保护区的主体,在维护区域生态平衡方面发挥着极其重要的作用。以辉河湿地为研究区,利用2000～2007年每一年的第97天至第289天的250m分辨率16天合成的MODIS归一化植被指数(NDVI)数据,以及90m分辨率的研究区DEM数据,根据典型地物第97天至第289天期间的ND-VI变化曲线特征,构建典型湿地地物信息提取模型,对辉河湿地面积进行提取。利用距研究区最近的鄂温克旗气象站2000～2007年的气温、降水量和蒸发量数据,用灰关联分析法分析了湿地面积变化与气候因子的关系。研究结果表明,2000～2007年期间,辉河湿地面积波动变化,2000年辉河湿地面积最大,为651.75km2,2006年面积最小,为441.19km2;5～9月降水量对辉河湿地面积影响最大,它们之间的灰关联度为0.82,即当地植物生长期的降水量是影响辉河湿地面积变化的主导因子。更多还原

【Abstract】 Huihe weland(48°4’36″N-48°55’29″N,118°47’30″E-119°41’27″E)is located in the southwest part of Hulunbeier,Inner Mongolia.Huihe wetland is the main part of Huihe National Nature Reserve,and playing a very important role in regional ecological balance.However,many researches in Huihe wetland were focus on the diversity survey of vegetation and bird,and few researches using remote sensing technology.In this paper,16-day composite MODIS NDVI data with 250 m resolution during 97th to 289th day in a year from 2000 to 2007 and DEM data 90 m resolution were used.Based on the NDVI profile of 3 land cover types in Huihe wetland during the period,the extracting model of wetland area was made.The result showed that the largest wetland area occurred in 2000 was 651.75 km2;and the smallest one in 2006 was 441.19 km2.the accuracy of the area extraction was evaluated using Landsat ETM+ image,which was 90% in 2000.The gray correlation analysis was used to analyze the relation between the wetland area and May-September precipitation,evaporation and air temperaturedegrees of gray correlation between area and climate factors is.The largest degree of gray correlation occurred between the wetland area and May-September precipitation was 0.82,which meant May-September precipitation was main influence factor on the wetland area.更多还原