干旱；TVDI； 生态地理区划； 时空分布； MODIS产品数据； 土地利用," /> 干旱；TVDI； 生态地理区划； 时空分布； MODIS产品数据； 土地利用,"/> 基于温度植被干旱指数的松辽平原干旱时空特征
干旱区研究

干旱区研究 ›› 2014, Vol. 31 ›› Issue (3): 383-389.

• 生态与环境 • 上一篇    下一篇

基于温度植被干旱指数的松辽平原干旱时空特征

王婷婷，张洪岩，郭笑怡，张正祥，赵建军   

  1. 东北师范大学地理科学学院，吉林 长春 130024
  • 收稿日期:2012-12-19 修回日期:2013-01-21 出版日期:2014-05-15 发布日期:2014-05-30
  • 通讯作者: 张洪岩.E-mail： zhy@nenu.edu.cn
  • 作者简介:王婷婷（1989-），女，硕士研究生，主要从事地理信息系统方面研究.E-mail： wangtt778@nenu.edu.cn
  • 基金资助:

    中央高校基本科研业务费专项资金（11SSXT134）) 资助

Spatiotemporal Change of Drought over the Songliao Plain Based on TVDI

WANG Ting-ting, ZHANG Hong-yan, GUO Xiao-yi, ZHANG Zheng-xiang, ZHAO Jian-jun   

  1. School of Geographical Science, Northeast Normal University, Changchun 130024, China
  • Received:2012-12-19 Revised:2013-01-21 Online:2014-05-15 Published:2014-05-30

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摘要： 利用MODIS产品数据，采用[WTBX]TVDI[WTBZ]方法，分析基于生态地理区的松辽平原干旱时空分布变化特征，探讨不同土地利用类型与干旱程度关系，结果显示：利用[WTBX]TVDI[WTBZ]获取干旱情况与实际相符合，是进行干旱监测一种有效手段。反演结果与郑度等对此区域生态地理区划分一致：干旱年际变化差异较大，分布差异明显， 2009年干旱分布面积最广，而2004年干旱面积最小；从干旱统计来看，2005年比2004年更湿润。研究区总体呈湿润趋势，湿润面积占总面积的84.95%，主要集中在耕地、林地和草地。水体类型不能利用[WTBX]TVDI[WTBZ]方法进行干旱监测。

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Abstract: Drought is a kind of natural disaster occurring frequently and affecting agricultural production in China, and it is important to improve the ecological environment, optimize the land allocation and water resources redistribution, and relieve the shortage of ecological resources in arid zone. The MODIS sensor is significantly advantageous in monitoring land use change because of its high spectral resolution, high temporal resolution and appropriate spatial resolution. Temperature vegetation drought index [WTBX](TVDI)[WTBZ] is widely used, and there are many evidences to reveal that it is a reasonable and effective way in monitoring land use change related significantly to drought. [WTBX]TVDI[WTBZ] is of an important theoretical significance in drought monitoring, crop irrigation, agricultural production, pasture conservation, forest fire detection, etc. By using [WTBX]TVDI[WTBZ] method from MODIS product, the spatiotemporal distribution of drought can be derived to explore the relationship between different land use types and drought over the Songliao Plain based on ecogeographical regionalization. The ecogeographical regionalization system is based on the biological and nonbiological factors. This study revealed that [WTBX]TVDI[WTBZ] turns out to be an effective way to get drought conditions, and the result was consistent with Zheng D[JP8]u’[JP]s ecogeographical regionalization theory. Temporal and spatial variation of drought in the study area was quite different from different time and different subregions during the period from 2002 to 2009. The area of drought was the largest in 2009 but the smallest in 2004. Holistically, the study area was in a wetting trend, and the proportion of wetting area including mainly the cropland, woodland and grassland was as high as 84.95%. [WTBX]TVDI[WTBZ] could not be used to monitor waters.