4. Flood Prediction (a) Recently, the extreme floods have become more frequent across the country. Discuss in detail the

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4 Flood Prediction A Recently The Extreme Floods Have Become More Frequent Across The Country Discuss In Detail The 1 (94.97 KiB) Viewed 17 times

4. Flood Prediction (a) Recently, the extreme floods have become more frequent across the country. Discuss in detail the frequency distribution functions that are available for the prediction of extreme flood values. [5 marks] (b) Table Q4 shows the annual maximum recorded runoff data in unit of m³/s for a river gauging station. Estimate the magnitude of flood for the period of 1998 to 2021 with return interval of 100-years by using three different methods of frequency distribution functions. [15 marks] Table Q4 for use in Question 4(b). 1998 1999 2000 2001 Year Runoff (m³/s) 2003 25 40 40 39 34 Year 2004 2009 2005 21 2006 20 2007 17 Runoff (m³/s) 22 19 Year 2010 2011 2015 2012 27 2013 35 Runoff (m³/s) 27 24 33 Year 2016 2017 2018 2021 2019 28 Runoff (m³/s) 29 26 26 37 2002 25 2008 19 2014 39 2020 31