THE COMPARISON OF REFRACTION YEARS WITH THE TREND STARTING YEARS OF KONYA CITY PRECIPITATION
- 1. Konya Technical University, Department of Civil Engineering, M. Sc. Student
- 2. Department of Civil Engineering, Selcuk University, Konya, Turkey
- 3. Department of Civil Engineering, Selcuk University, Konya, Turkey
Abstract: Precipitation is one of the most varying parameter among the climatic parameters. As a result of global warming, the long-year average precipitation value of 643 mm for Turkey gradually decreases every passing year. Moreover, the ongoing factors provoking drought will cause serious problems related to water and water resources in the future. The accurate forecasting of precipitation has great importance for effective planning and management of water resources. In this study, the cumulative precipitation data of the precipitation gauging station of Konya Region (No.17244) between years 1929-2006 were subjected to homogeneity analyses of Standard Normal Homogeneity Test (SNHT), Pettitt and Buishand Tests to determine the years at which homogeneity presents refraction. After checking the existence of trend for the data set by using Mann Kendall Trend Analysis, the trend starting years and the refraction years are compared using the Mann-Kendall Range Correlation Analysis. According to the test results, the years determined as the refraction years were observed in accordance with the trend starting years determined by the Range Correlation Analysis.