[1]WU Li,XIE Wenhuan,ZHANG Youzhi,et al.Research of Drought Characteristics in Heilongjiang Province Nearly 20 years Based on Temperature Vegetation Dryness Index by Remote Sensing[J].Research of Soil and Water Conservation,2022,29(05):358-363.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 05
Page number:
358-363
Column:
Public date:
2022-08-20
- Title:
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Research of Drought Characteristics in Heilongjiang Province Nearly 20 years Based on Temperature Vegetation Dryness Index by Remote Sensing
- Author(s):
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WU Li, XIE Wenhuan, ZHANG Youzhi, SONG Lijuan, LI Yan, LYU Zhiqun
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(Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China)
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- Keywords:
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precipitation; average temperature; temperature vegetation dryness index; Heilongjiang Province
- CLC:
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TP79; S423
- DOI:
-
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- Abstract:
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In order to monitor drought time series and regional characteristics in Heilongjiang, based on the temperature of the moderate resolution imaging spectroradiometer(MODIS)and normalized differential vegetation index(NDVI)data, the monthly temperature vegetation dryness index(TVDI)in Heilongjiang from 2000 to 2019 was produced. The time series TVDI data were used to monitor the drought characteristics in Heilongjiang during the past 20 years from May to September. The results showed that: the time series TVDI indicated that the drought intensity was severe from 2000 to 2006,weakening from 2007 to 2013 and shock weakening from 2014 to 2019; from the perspective of whole Heilongjiang, the monthly extreme drought was the highest in 2006, 2005 and 2009, respectively, the annual mean drought intensity and the monthly extreme drought event of each year were weakening from 2000 to 2019; the mostest severe drought period in the monthly mean drought intensity from 2000 to 2019 was May, drought periods in June and September were weakening, droughts in July and August were the lightest; according to the drought of intensity and frequency, the whole province could be divided into three regions: regional severe drought with the most frequency and high intensity named severe drought risk region, regional moderate drought with lower frequency and intensity named moderate drought risk region, regional light drought with slightly frequency and intensity named slight drought risk region: the severe drought risk region occurred in Nehe,Gannan,Qiqihar, Longjiang, Lindian, Tailai, Daqing, Zhaoyuan and Du'erbote, moderate drought risk region occurred in western area, Baoqing, Fujin, Youyi, Jixian, Boli and Ning'an, slight drought risk region occurred in northern, central and northeastern regions. The regional drought by the month was that: droughts in May were severe in the western regions, Ning'an, Boli, Jidong, Youyi County, Baoqing County and Jixian etc, droughts in June were continuous in the western regions, droughts in September were severe in Tailai County, other areas around Daqing and Longjiang, Gannan, Qiqihar, Nehe, etc. This study can provide certain reference for local governments to formulate drought relief and agricultural production policies. In summary, the above research results can provide data reference for drought resistance and disaster reduction departments in Heilongjiang Province, and guide the effective irrigation of high-standard farmland.