基于温度植被干旱指数的黑龙江省旱情动态研究

发布时间：2018-06-10 19:56

本文选题：温度植被干旱指数 + MODIS　；参考：《干旱地区农业研究》2017年04期

【摘要】：2015年黑龙江省发生大面积干旱,为了对此旱情进行动态监测,采用6—9月的MODIS数据,计算温度植被干旱指数(TVDI);以过去15年(2000—2014年)的全省40个旱作农业站点以旬为单位的TVDI为研究对象,根据土壤相对湿度的农业干旱等级划分标准,制定TVDI的干旱监测等级,利用2011年实地测取土壤相对湿度数据对该等级进行验证,结果表明,验证结果准确度达到83%。结果显示:TVDI被分为5个等级,TVDI0.46为无旱,TVDI在0.46~0.57之间为轻旱,TVDI在0.57~0.76之间为中旱,TVDI在0.76~0.86之间为重旱,TVDI0.86为特旱,用此标准对黑龙江省2015年的旱情进行分析,能够较好地反映出黑龙江省整体的实际旱情。在监测中2015年7月份全省旱情最为严重,持续到8月中旬,到8月下旬省内各地陆续降雨,重旱区域减少,整体旱情减轻。
[Abstract]:A large area of drought occurred in Heilongjiang Province in 2015. In order to monitor the drought dynamically, MODIS data from June to September were used. The temperature vegetation drought index (TVDII) was calculated and the drought monitoring grade of TVDI was established according to the criteria of soil relative humidity classification for agricultural drought in 40 dryland farming stations in the past 15 years (2000-2014) in the province, in which ten days were taken as the research objects. The data of soil relative humidity measured in 2011 were used to verify the grade. The results showed that the accuracy of the verification was 83%. The results showed that: TVDI0.46 was divided into 5 grades, TVDI was between 0.46 and 0.57 without drought, TVDI was between 0.57 and 0.76, TVDI from 0.76 to 0.86 was severe drought, and TVDI0.86 was special drought. The drought in Heilongjiang Province in 2015 was analyzed by using this standard. Can better reflect the actual drought situation in Heilongjiang Province as a whole. The drought situation in July 2015 was the most serious in the whole province, which lasted until the middle of August. In late August, it was raining all over the province one after another, and the severe drought area was reduced, and the overall drought situation was alleviated.
【作者单位】：黑龙江省农业科学院遥感技术中心;
【基金】：哈尔滨市科学技术局青年后备人才项目(2014RFQYJ108) 国防科工局重大专项科研项目子项目(E0201/1112-2)
【分类号】：S423

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