• Shonahar Ali
• Manash Pratim Kashyap

This study shows the analysis of 46 years annual peak flood frequency data by Log-Normal Distribution model at the Velterghat Gauging station for the Krishnai river of Assam. Parameters are estimated by using different methods and the Maximum Likelihood Estimation (MLE) is found as the best method. As goodness of fit criteria, Empirical and theoretical densities, Empirical and theoretical CDFs, Q-Q plot, P-P plot are plotted using R. Anderson Darling test was performed, which shows the Log-Normal Distribution fits the data. The return period for 2, 5, 10, 25, 50,100 and 200 years are estimated by this distribution model for the river. Kolmogorov- Smirnov test was performed to check the goodness of the fitted model.

Log-normal, Parameter, MLE, Return Period, Plot.

"Annual Peak Flood Frequency Analysis by Log-Normal Distribution for the River Krishnai of Assam", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.858-865, June-2019, Available :http://www.jetir.org/papers/JETIR1906S59.pdf

"Annual Peak Flood Frequency Analysis by Log-Normal Distribution for the River Krishnai of Assam", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp858-865, June-2019, Available at : http://www.jetir.org/papers/JETIR1906S59.pdf