摘要
利用遥感数据和GIS技术，对浑善达克沙地14a以来植被NDVI的时空变化与气温、降水的耦合关系进行了研究，并与Hurst指数叠加，分析未来该区植被覆盖状况．结果表明：1）浑善达克沙地植被覆盖在空间上呈现东南部高，依次向西北递减的特征；2）2001～2014年研究区植被覆盖年均值在0．35～0．47之间波动，2001—2003、2009—2012年植被NDVI波动较大，呈增长趋势；3）从变化趋势上来看，植被覆盖大多数地区呈上升的趋势，植被覆盖增加面积大于退化面积，改善区域面积达45．05％，退化区域仅为16．04％；4）从发展的角度来看，研究区植被覆盖呈现持续增加的区域占84．92％，NDVI具有较强的可持续性，由变化趋势与Hurst指数的耦合结果得知，持续改善区域面积为43．82％，持续稳定占32．41％，持续退化面积较少．
With RS data combined and GIS technology, this paper quantitatively analyses the coupling relations between growth season NDVI temporal and spatial of temperature and precipitation variation characteristics from 2001 to 2014 in the Otindag Sandy Land, then mix with Hurst index to analyze the vegetation in future of this area. The results show that ： 1 ） Vegetation coverage in space showed a high turn to the southeast, northwest characteristics decline in Otindag Sandy Land ;2） The vegetation cover annual mean values fluctuate between 0. 35 -0. 47 From 2001 to 2014, NDVI shows obvious fluctuations and increasing trend between 2001 -2003 and 2009 -2012;3） From the trend point of view,vegetation cover in most of the region presents an upward trend, increasing vegetation coverage area is larger than the degraded region, the regional area in improvement is 45.05% and area in degradation is 16. 04% ;4） Degradation areas,from the point of view of sustainability, the vegetation cover is the sustainable development of the region accounted for 84. 92%, NDVI has strong sustainability, coupled by the change trend and Hurst index results, continued improve the regional area of 43.82%, accounting for 32. 41% of steady, continuous deterioration area is less.
出处
《鲁东大学学报（自然科学版）》
2016年第2期181-187,共7页
Journal of Ludong University:Natural Science Edition
