2001—2014年间黄土高原植被覆盖状态时空演变分析

发布时间：2018-04-24 03:10

本文选题：黄土高原 + 遥感　；参考：《国土资源遥感》2017年01期

【摘要】：黄土高原植被覆盖状态的时空变化对于该地区植被恢复具有重要意义。基于2001—2014年间黄土高原地区MODIS-EVI2时序数据,建立2个反映植被覆盖状态的指标:植被覆盖强度与植被时间覆盖度。采用趋势分析以及突变点检测方法,得到近14 a间黄土高原植被覆盖状态的时空演变特征。研究结果表明:1黄土高原植被覆盖状态整体呈从西北到东南递增的分布特点,整个区域内近10 a间的植被覆盖状态增长速度相较于1982—2006年间明显增快;2研究区内多年植被覆盖强度与植被时间覆盖度呈正趋势变化的面积分别占整个研究区面积的43.04%和32.57%,发生变化的年份多集中于2006—2007年与2011—2012年;而多年植被覆盖强度与植被时间覆盖度呈负趋势变化的面积分别占整个研究区面积的2.92%与5.86%,发生变化区域多分布于农业种植区。研究有效证明了近年来退耕还林/防风固沙政策已取得了明显效果。
[Abstract]:The temporal and spatial variation of vegetation cover in Loess Plateau is of great significance to vegetation restoration in this area. Based on the MODIS-EVI2 time series data from 2001 to 2014 in the Loess Plateau, two indexes were established to reflect the vegetation coverage: the vegetation coverage intensity and the vegetation time coverage. The temporal and spatial evolution characteristics of vegetation cover state in the Loess Plateau during the past 14 years were obtained by using trend analysis and abrupt change point detection method. The results show that the vegetation coverage in the Loess Plateau is increasing gradually from northwest to southeast. The growth rate of vegetation cover status in the whole region in the past 10 years is significantly higher than that in 1982-2006 in the study area. The area with positive trend of vegetation cover intensity and vegetation time coverage in the study area accounts for the whole study area, respectively. 43.04% of the area and 32.57% of the area, most of the changes occurred in 2006-2007 and 2011-2012; The area with negative trend of vegetation cover intensity and vegetation time coverage accounted for 2.92% and 5.86% of the total area of the study area respectively. The results show that the policy of returning cropland to forest / preventing wind and sand has achieved obvious effect in recent years.
【作者单位】：福州大学地理空间信息技术国家地方联合工程研究中心;
【基金】：国家自然科学基金项目“抗干扰的农作物种植模式自动提取方法”(编号:41471362)资助
【分类号】：Q948;TP79

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