【摘要】 选择黄河源头玛多县,利用遥感手段分析了该地区1990~2000年和2000~2004年的湿地动态变化,采用灰色关联度法,分析了不同类型的湿地与各气象因子的关联系数。结果表明:在1990~2004年间,黄河源湿地呈现持续萎缩的状态,减少速率平均为2864.48 hm2/a。其中前10年和后4年平均减小速率分别为2329.81和4201.14 hm2/a,后4年的变化速度是前10年的1.8倍。高原湖泊处于比较稳定的状态,转移概率小于3%,而高原沼泽湿地和河流湿地处于非常不稳定的状态,与其他土地类型的转移概率分别达到40.16%~38.37%和46.27%~40.25%。不同的湿地类型与气象因子的关联度是不同的,沼泽与日照和蒸发关联度最大,湖泊与蒸发和降水关联度最大,河流与气温和蒸发关联度最大。更多还原

【Abstract】 By remote sensing technology wetlands changes from 1990 to 2000 and from 2000 to 2004 were analyzed in Maduo county(in the Yellow River Source Region),and transform rule between different wetlands was opened out.By Grey Correlative Analysis method the relative coefficient between different wetlands and meteorological factors was studied.The results indicated that,swampland and lake were dominant wetlands in the Yellow River Source Region,which accounted for 92% of the total wetlands area.From 1990 to 2004,wetlands in the Yellow River Source Region continued shrinking at a rate of 2864.48 ha/a.The decreasing rate from 1990 to 2000 and that from 2000 to 2004 were respectively 2329.81 ha/a and 4201.14 ha/a.The decreasing rate during the latter 4 years was 1.8 times of that during the former 10 years.Lake change in the plateau was stable,and the transform probability to other land types was less than 3%.The changes of swamplands and rivers were very unstable.The transform probability of swampland to other land types was from 38.37% to 40.16%,and that of river to other land types was from 40.25% to 46.27%.The relative coefficient between different wetlands and meteorological factors was different.Swampland was highly relative to sunlight and evaporation,and lake was highly relative to evaporation and precipitation,and river was highly relative to air temperature and evaporation.更多还原