基于NDVI的乌拉特后旗植被覆盖度时空变化分析

doi:10.13466/j.cnki.lyzygl.2017.06.016

摘要/Abstract

摘要：

提取内蒙古巴彦淖尔市乌拉特后旗2006年、2010年及2015年3个时期的遥感影像,利用GIS软件计算了乌拉特后旗3个年度的植被覆盖度,同时对该地区植被覆盖在时间变化及空间变化中的状况进行了分析。结果表明:从时间方面看,乌拉特后旗的植被覆盖度整体呈增长的趋势。裸地及微植被覆盖度显著减少,低植被覆盖度和高植被覆盖度缓慢增加,中植被覆盖度在2010—2015年有显著增加的趋势。从空间方面看,乌拉特后旗的植被覆盖度逐渐递增并呈现东南部覆盖度高西北部覆盖度低的态势。阴山以南河套平原地区的高植被覆盖度及中植被覆盖度缓慢增加,阴山以北的荒漠及半荒漠草原的微植被覆盖度逐渐减少,到2015年时其植被覆盖度明显增加,转变为以低植被覆盖及中植被覆盖为主的态势,且出现零星的高植被覆盖度。

关键词: 乌拉特后旗, 植被覆盖度, 时空变化

Abstract:

This paper adopted the remote sensing images from 2006,2010 and 2015 respectively.In addition,the result of the annual vegetation coverage in Wulatehouqi for the three mentioned years were calculated by using GIS software.Meanwhile,the variation of the vegetation coverage in time and space was specifically analyzed in this area.The result shows that:Temporally,it shows that there is a gradual increase in vegetation coverage.However,bare land and micro vegetation was significantly reduced,low vegetation coverage and high vegetation coverage increased slowly.The trend for vegetation coverage indicated an obvious upward slope within the decade.From the spatial perspective,the overall vegetation coverage in Wulatehouqi was gradually increasing.Specifically,there is a high coverage rate in south-east area and a low one in north-west region.The coverage rate for high vegetation and medium vegetation increased steadily in Hetao Plain where south area of the Yinshan Mountains,moreover to the north region of the Yinshan Mountains,the coverage rate for micro vegetation reduced gradually in the desert and the semi desert steppe.The vegetation coverage increased by 2015.It had transformed from more coverage rate in micro vegetation to more coverage rate in low vegetation and medium vegetation whereas the coverage rate in high vegetation showed a trend of slight increase.A transformation of the majority of the coverage rate taken by low vegetation and medium vegetation whereas the coverage rate in high vegetation showed a trend of slight increase.

Key words: Wulatehouqi, vegetation coverage, change of time and space

中图分类号:

S718.5
Q948

莎日娜. 基于NDVI的乌拉特后旗植被覆盖度时空变化分析[J]. 林业资源管理, 2017,(6): 89-93.

SHA Rina. Analysis of Temporal and Spatial Variation of Vegetation Cover in Wulatehouqi Based on NDVI[J]. FOREST RESOURCES WANAGEMENT, 2017,(6): 89-93.

图/表 5

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年份	高植被覆盖度	中植被覆盖度	低植被覆盖度	微植被覆盖度
2006	8.92	9.95	9.07	72.06
2010	12.65	20.65	20.91	45.79
2015	15.55	45.52	31.54	7.39