Investigation of rainfall intensity series of standard duration with trend analysis methods

Abstract

Emerging changes in the ecosystem and global warming are among the humanity's most important issues in today's world. Global warming, melting of glaciers, rising sea water levels and irregularities in rainfall show the existence of these problems. The irregularities in rainfall are of great importance in terms of existing and planned water structures. Recently in our country; irregularities in averaged rainfall data measured over many years, declines and irregularities in the intensity of precipitation are frequently observed. These findings show that Turkey is also affected by ecosystem and global warming in different dimensions. Trends in rainfall intensity at stations were determined by using the standard duration rainfall intensity data obtained from the Maximum Rainfall Data observed in standard durations by 207 observation stations in Turkey, the observation period being over 20 years. The data was obtained from the General Directorate of Meteorology. Mann Kendall and Spearman's Rho were used to identify trends, while Innovative Trend Analysis methods were used to determine dominance. Trends were determined by using Mann-Kendall and Spearman's Rho trend testing methods for each standard time of station data, and the dominance of data sets were determined by using innovative trend analysis. Trend and dominance maps of the stations used for each standard duration are prepared in the context of the determined results.