@article{ASWAD_YOUSIF_IBRAHIM_2021, title={TREND ANALYSIS USING MANN-KENDALL AND SEN’S SLOPE ESTIMATOR TEST FOR ANNUAL AND MONTHLY RAINFALL FOR SINJAR DISTRICT, IRAQ}, volume={23}, url={https://journal.uod.ac/index.php/uodjournal/article/view/954}, DOI={10.26682/csjuod.2020.23.2.41}, abstractNote={<p>The time series rainfall data of 70 years (1940 – 2010) of Sinjar District used to identify the trend and <br>slope magnitude of this series. To analyze the trend, the non-parametric test (Mann-Kendall test) and<br>Sen’s slope estimator were used. For developing a functional relationship between variables, a linear trend <br>of rainfall data for the studied area evaluated using the linear regression. The annual trend analysis <br>showed decreasing trend because the value of Mann- Kendall’s tau and the magnitude of Sen’s slope <br>estimator were both negative and was found to be - 0.06501 and -0.7283, respectively. Also for the slope of <br>the linear regression was negative and equal to −0.916 mm/year, which represents the rate of decreasing in <br>trend for yearly annual rainfall. In addition, the results showed that the trend analysis of monthly rainfall <br>has a varied trend of rainfall in the rainy months. Finally, the results showed a positive trend (increasing) <br>for the months of October and April and negative trend (decreasing) for the other months.</p&gt;}, number={2}, journal={Journal of Duhok University}, author={ASWAD, FAWAZ KH. and YOUSIF, ALI A. and IBRAHIM, SAYRAN A.}, year={2021}, month={Jan.}, pages={501-508} }