内蒙古达拉特旗土地沙漠化动态研究

The Dynamic Change of Land Desertification of Dalate County in Inner Mongolia

在GIS和遥感技术支持下,利用调查时间同步的两期标准假彩色合成TM遥感影像(2000年7月、2005年7月),对达拉特旗土地沙漠化现状及其动态变化进行研究.结果显示,从2000年到2005年,研究区沙漠化呈逆转趋势,沙漠化土地面积从1383.8km2减少到1352.9km2,减少了40.9km2,年均减少8.2km2.在此基础上,结合实地调查,发现气候变化并不是导致研究区沙漠化逆转过程的主要因素,在一定自然条件和社会经济水平下,合理的人类活动对沙漠化逆转起到了积极的作用.

The current situation and dynamic change of land desertification in Dalate County are analyzed by using GIS and RS which based on two times TM remote sense images（July, 2000 and July, 2005）. The results show that the trend of desertification reverse from 2000 to 2005,2000 is 1383.8 km2 and 2005 is 1 352.9 km2, decreases 40. 9 km2, the annual decrease rate is 6.8 km2. Based above research and combined field investigation, the cause of the desertification reverse has been further explored by comprehensive analysis of meteorological condition and society economy factor. That the climate changes is not the major factor to the desertification process in this area,but positive effect of rational human activity caused desertification reverse under certain nature and society economy condition.