乌审旗荒漠化动态变化与气候原因分析

Wushenqi desertification dynamic changes and climate cause analysis

以内蒙古鄂尔多斯市乌审旗为研究对象,利用乌审旗2000、2005、2007年三期的Landsat TM遥感影像基础上获取土地荒漠化现状矢量数据、动态变化矢量数据等为基本数据源。分析2000年、2007年的荒漠化类型面积的数据,得出其变化幅度、动态度,由此可看出在研究时间段内各个荒漠化类型面积的增减。通过分析2000-2005、2005-2007两个阶段的荒漠化类型转移情况的数据,利用转移矩阵的方法,得出各个类型的荒漠化土地面积在这两个阶段的转移情况。再利用乌审旗气象站点1980至2006年的气象数据为基本数据源,选择降雨量、气温、蒸发量、大风日数等气候因子的数据,对其进行了5年滑动变化分析得出乌审旗气候时空变化图等,得到其发展变化规律及其对荒漠化的影响。

In Inner Mongolia Eerduosi city as the research object, using 2007 desertification in eight flag, the data of acreage of its present condition analysis. Using the 2000, 2005, in 2007, the desertiflcation in 2007, the data of acreage that its development rate, years development rate, which can be seen in the study period of acreage decrease of each de- sertification. Using the 2000-2005, 2005-2007, three stages of desertification type move case data, using the transfer matrix method to get each type of desertification land area in the transfer of the three stages. This paper chose the region of four flags in 2006 1980-27 years of climate data, including rainfall and temperature, evaporation, such as the winds stay climate factor, the data for 5 years sliding drawings, the four seasons distribution to obtain its mapping, to the devel- opment regularity and the influence of desertification.