Trend Analysis of Hydrometeorological Data Using Wilcoxon Test and Scatter Diagram

Öz

Water scarcity is becoming increasingly widespread due to the increasing world population and the effects of climate change. This situation makes the management of water resources more critical. . This study includes the use of different methods for trend analysis of precipitation measurements, which are hydrometeorological data, in order to understand the effects of climate change and the comparative examination of the results of these methods. The Mann-Kendall (MK) test, Wilcoxon test and Şen's Innovative Trend Analysis (ITA) methods are the main tools of this study. This study has carried out a detailed trend analysis using precipitation data obtained from eight different hydrometeorological stations located on the Aegean and Mediterranean coasts of Turkey. These analyses were carried out on maximum precipitation data measured for 30 minutes, 60 minutes and 120 minutes. As a result, it was determined that there was a general significant increase in annual precipitation in these regions under the influence of the Mediterranean climate.

Anahtar Kelimeler

• Mann-Kendall
• innovative trend analysis
• wilcoxon test
• time series

Wilcoxon Testi ve Saçılma Diyagramı Kullanılarak Hidrometeorolojik Verilerin Trend Analizi

Öz

Dünya nüfusunun artması ve iklim değişikliğinin etkisiyle su kıtlığı giderek yaygınlaşmaktadır. Bu durum su kaynaklarının yönetimini daha kritik hale getirmektedir. Bu çalışma, iklim değişikliğinin etkilerini anlamak için hidrometeorolojik bir veri olan yağış ölçümlerinin trend analizi için farklı yöntemlerin kullanılmasını ve bu yöntemlerin sonuçlarının karşılaştırılmalı olarak incelenmesini içermektedir. Mann-Kendall (MK) testi, Wilcoxon testi ve Şen’in Yenilikçi Trend Analizi (YTA) yöntemleri bu çalışmanın temel araçlarıdır. Bu çalışma, Türkiye’nin Ege ve Akdeniz kıyı şeridinde yer alan sekiz farklı hidrometeorolojik istasyon üzerinden elde edilen yağış verilerini kullanarak detaylı bir trend analizi gerçekleştirmiştir. Bu analizler 30 dakika, 60 dakika ve 120 dakika süreyle ölçülen maksimum yağış verileri üzerinden gerçekleştirilmiştir. Akdeniz iklimi etkisindeki bu bölgelerde sonuç olarak yıllık yağış miktarında genel olarak belirgin bir artışın olduğu tespit edilmiştir.

Anahtar Kelimeler

• Mann-Kendall
• yenilikçi trend analizi
• wilcoxon test
• zaman serileri

Kaynakça

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