Investigation of Precipitation Trend in Regional Scale Based on the Statistical Approach.

Abstract

In recent years, hydrological trend analysis had become very popular due to global warming and climate change issues. Knowledge of the trend changes of hydrological series helps designers, engineers, and plan makers about future projections of all water related problems such as irrigation systems, water distribution systems, etc. Statistical approaches are historically very crucial for determining the trend. In this study, authors focused on determining total precipitation trend change monthly, seasonally, and annually on a regional scale. Non-parametric Mann Kendall test, Spearman’s Rho test, and Sen's Slope test are used for the determination of the precipitation trend. Additionally, the total annual precipitation trend is investigated with the linear regression trend analysis method. Detailed results of each method are shared separately.

Keywords

• precipitation
• trend
• mann kendall test
• sen’s slope test
• spearman’s rho test