HUBEI AGRICULTURAL SCIENCES ›› 2023, Vol. 62 ›› Issue (3): 241-248.doi: 10.14088/j.cnki.issn0439-8114.2023.03.038

• Weather & Climate • Previous Articles     Next Articles

Monitoring and evaluation on drought in the growing season of Heilongjiang Province based on FY-3D_TVDI

XU Zuo-min1, WU Shuang1, WU Ying2, GONG Li-juan3, JIANG Li-xia3, SUN Tao1, CHENG Chun-xiang1, XIE Lian-ni1   

  1. 1. Heilongjiang Eco-meteorological Center,Harbin 150030, China;
    2. China Meteorological Administration Public Meteorological Service Center, Beijing 100081, China;
    3. Heilongjiang Province Institute of Meteorological Science,Harbin 150030, China
  • Received:2021-10-25 Published:2023-04-20

Abstract: A Ts-NDVI feature space was constructed based on FY-3D meteorological satellite data, and the temperature vegetation dryness index (TVDI) was calculated. The temporal and spatial distribution of drought in the main agricultural areas of Heilongjiang Province in the 2020 growing season was evaluated. In addition, the impact factor of TVDI was studied based on elevation, slope and meteorological data. The results showed that,in the 2020 growing season, a significant regional difference was found on the spatial distribution of TVDI in agricultural areas in Heilongjiang Province, indicating a trend of humidity in north and east, arid in western, central, and southern regions. The TVDI in the east agricultural areas, which was normal or partial waterlogging, was mainly distributed from 0.2 to 0.6. There were 2 typical drought events in other agricultural areas, and the drought peaks were in mid-May and early September.With the 400 m elevation as the cut-off point, the TVDI in the less than 400 m elevation region was positively correlated with the elevation, and the TVDI above the 400 m elevation region was negatively correlated with the elevation. The slope inflection point was 3.5°. TVDI gradually increased with the increase of the slope before the inflection point, and slowly decreased with the increase in the slope after the inflection point. The impact of ten-day average temperature on TVDI was greater than that of ten-day cumulative precipitation, and the average temperature had a continuous impact on TVDI, lasting about 10 to 20 days.

Key words: drought, temperature vegetation dryness index (TVDI), remote sensing, temporal and spatial distribution, Heilongjiang Province

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