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Evaluating salinity damage to crops through satellite data analysis: application to typhoon affected areas of southern Japan

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  • Kensuke Goto
  • Takehiro Goto
  • Jephtha Nmor
  • Kazuo Minematsu
  • Keinosuke Gotoh

Abstract

In recent times, tsunamis and typhoons have threatened Japan’s coastal lands with increased flooding and salinity. Using satellite data, we monitored the effect of increased salinity on vegetation health in the coastal area of southern Japan, which was affected by flooding following Typhoon 9918 in 1999. An index of plant activity called the Normalized Difference Vegetation Index (NDVI) was evaluated before and after the typhoon, and the change in NDVI was computed as a comparison measure. The results were then correlated with electric conductivity, which is a measure of soil salinity. A strong negative correlation was found between NDVI ratio and salt concentration (r = − 0.7731, n = 50, p > 0.0001), indicating that the reduced NDVI values were attributable to increased salinity from the flooding. These results not only provide useful insight into a rapid method of assessing large-scale flood impacts using satellite data, but also validate the monitoring of NDVI as an indicator of salinity damage to vegetation. To summarise, by understanding the changes in vegetation health following natural disasters such as flooding (as revealed by NDVI), we can potentially develop improved management strategies. Copyright The Author(s) 2015

Suggested Citation

  • Kensuke Goto & Takehiro Goto & Jephtha Nmor & Kazuo Minematsu & Keinosuke Gotoh, 2015. "Evaluating salinity damage to crops through satellite data analysis: application to typhoon affected areas of southern Japan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 75(3), pages 2815-2828, February.
    • Handle: RePEc:spr:nathaz:v:75:y:2015:i:3:p:2815-2828
    DOI: 10.1007/s11069-014-1465-0
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    References listed on IDEAS

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    1. Datta, K. K. & Jong, C. de, 2002. "Adverse effect of waterlogging and soil salinity on crop and land productivity in northwest region of Haryana, India," Agricultural Water Management, Elsevier, vol. 57(3), pages 223-238, December.
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    1. Noy, Ilan & Blanc, Elodie & Pundit, Madhavi & Uher, Tomas, 2023. "Nowcasting from Space: Impact of Tropical Cyclones on Fiji’s Agriculture," ADB Economics Working Paper Series 676, Asian Development Bank.
    2. Rosa Coluzzi & Simonetta Fascetti & Vito Imbrenda & Santain Settimio Pino Italiano & Francesco Ripullone & Maria Lanfredi, 2020. "Exploring the Use of Sentinel-2 Data to Monitor Heterogeneous Effects of Contextual Drought and Heatwaves on Mediterranean Forests," Land, MDPI, vol. 9(9), pages 1-19, September.
    3. Elodie Blanc & Ilan Noy, 2022. "Impacts of Droughts and Floods on Agricultural Productivity in New Zealand as Measured from Space," CESifo Working Paper Series 9634, CESifo.

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