Othman. Ali, R. and Rashid Abubaker, S. 2019. Trend analysis using mann-kendall, sen’s slope estimator test and innovative trend analysis method in Yangtze river basin, china: review. International Journal of Engineering & Technology. 8, 2 (Jul. 2019), 110–119. DOI:https://doi.org/10.14419/ijet.v7i4.29591.