Comparison and evaluation of remote sensing indices for agricultural drought monitoring over Kazakhstan

B. Sun, J. Qian*, X. Chen, Qiming ZHOU

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Drought has a significant impact on the Kazakhstan's agricultural economy, which is the world's largest wheat flour exporting country. Remote sensing provides an efficient tool for monitoring agricultural drought in a wide range. Hundreds of remote sensing drought indices have been developed during the past decades. Some of them have been widely used over the world as an indispensable indicator in drought monitoring systems. However, the applicability of those indices in Kazakhstan, the largest country in Central Asia has not been tested, especially for agricultural drought monitoring. In this study, the most common remote sensing drought indices in current running systems of drought monitoring are compared and evaluated. The response of those indices to the soil drought is validated based on remote sensing soil moisture data. In addition, the effectiveness of remote sensing indices in agricultural drought monitoring is assessed according to agricultural product yield data from the past 15 years (2004-2018). Results indicate that remote sensing drought indices can generally reflect serious drought events in the study area, but the consistency of different types of indices is poor. Compared with annual statistics of agricultural product yield, remote sensing drought index better reflects the long-term change of agricultural drought in Kazakhstan.

Original languageEnglish
Pages (from-to)899-903
Number of pages5
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
Volume43
Issue numberB3
DOIs
Publication statusPublished - 6 Aug 2020
Event2020 24th ISPRS Congress - Technical Commission III - Nice, Virtual, France
Duration: 31 Aug 20202 Sep 2020

Scopus Subject Areas

  • Information Systems
  • Geography, Planning and Development

User-Defined Keywords

  • Agricultural Drought
  • Crop Yield
  • Kazakhstan
  • Remote Sensing Drought Index
  • Validation

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