Monitoring of agricultural drought in Turkey with remote sensing data by use of Google Earth Engine

Year 2024, Volume: 30 Issue: 1, 71 - 80, 29.02.2024

Gülay Onuşluel Gül

Abstract

Studies on drought, which can have quite complex and devastating effects due to a number of interrelated factors, are developing continuously in order to eliminate the consequences of such a natural disaster and even further to facilitate actions for taking timely measures. This study, which is carried out in this holistic framework, is based upon the temporal and spatial assessment of drought phenomenon on the Google Earth Engine (GEE) platform through the use of remotely-sensed data. For this purpose, Temperature Condition Index (TCI), Vegetation Condition Index (VCI) and Vegetation Health Index (VHI) were calculated both for the recent period (2018-2021) and the previous periods (the years 2002, 2005, 2010 and 2015) examined through July and January months and the agricultural drought situation was revealed in this way.

Keywords

Drought, Remote sensing, Google Earth Engine (GEE), Temperature condition index (TCI), Vegetation condition index (VCI), Vegetation health index (VHI)

Türkiye’de tarımsal kuraklığın uzaktan algılama verileri ile Google Earth Engine üzerinden izlenmesi

Abstract

Birbiriyle ilişkili birçok etkene bağlı olduğundan oldukça karmaşık ve yıkıcı etkileri olabilen kuraklıkla ilgili çalışmalar, bu doğal afetin sonuçlarının bertaraf edilebilmesi ve önlemlerin zamanında alınarak harekete geçilebilmesini kolaylaştırmak amacıyla bir süreklilik gösterecek şekilde gelişmektedir. Bütünsel çerçevede gerçekleştirilen bu çalışmada, kuraklık olgusunun zamansal ve mekânsal olarak, uzaktan algılama verileri kullanılarak Google Earth Engine (GEE) platformunda hesaplanmasına dayanmaktadır. Bu amaçla, Sıcaklık Durum İndisi (TCI), Bitki Örtüsü Durumu İndisi (VCI) ve Bitki Örtüsü Sağlığı İndisi (VHI), yakın geçmiş dönem (2018-2021) ile geçmiş dönemler (2002, 2005, 2010 ve 2015 yılları) için temmuz ve ocak ayları bazında incelenmiş ve böylece tarımsal kuraklık durumu ortaya konulmuştur.

Keywords

Kuraklık, Uzaktan algılama, Google Earth engine (GEE), Sıcaklık Durum İndisi (TCI), Bitki örtüsü durum indisi (VCI), Bitki örtüsü sağlığı indisi (VHI)

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