A revised agricultural drought index in Lithuania

  • Egidijus Rimkus Vilnius University, Lithuania
  • Viktorija Maciulyte Vilnius University, Lithuania
  • Edvinas Stonevicius Vilnius University, Lithuania
  • Donatas Valiukas Vilnius University, Lithuania

Abstract

The objective of this study was to develop the best methodology for determining agricultural droughts in Lithuania. The currently used assessment methods do not always accurately reflect drought conditions in the country, especially in the first half of the growing season. For this purpose, the relevance of the currently used Hydrothermal Coefficient (HTC) and five drought indices widely used in other countries were reassessed. It was found that the methodologies applied in Lithuania and other countries are not completely suitable under current conditions. A new agricultural drought identification methodology using the Temperature–Precipitation Index (TPI) is proposed as a result of this study. Analysis of long-term changes (1961–2019) in reoccurrence of droughts was carried out. It was determined that the largest number of droughts in Lithuania was recorded in the last decade of the 20th century and in the first decade of the 21st century. Despite the fact that there is a positive tendency in reoccurrence of droughts, the changes are not statistically significant.

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Section
Articles
Published
Sep 24, 2020
How to Cite
Rimkus, E., Maciulyte, V., Stonevicius, E., & Valiukas, D. (2020). A revised agricultural drought index in Lithuania. Agricultural and Food Science, 29(4), 359–371. https://doi.org/10.23986/afsci.92150