Global Journal of Researches in Engineering, J: General Engineering, Volume 1 9 Issue 2

S/N Month 2010 2011 2012 2013 2014 1 Jan 0.88 0.00 0.00 0.00 1.36 2 Feb 80.97 0.00 0.00 0.00 34.34 3 Mar 93.14 57.20 322.99 0.00 217.19 4 Apr 283.64 137.81 211.53 206.85 765.67 5 May 265.28 270.36 183.99 173.34 1075.29 6 Jun 229.24 213.41 157.78 329.51 565.39 7 Jul 663.66 814.04 432.51 368.44 909.12 8 Aug 550.79 322.99 113.41 234.48 1252.34 9 Sep 200.27 183.99 249.22 205.92 940.04 10 Oct 202.95 172.46 188.49 950.95 1191.19 11 Nov 0.00 0.00 94.21 0.00 72.95 12 Dec 24.25 0.00 33.33 0.00 22.90 Sum 2595.06 2172.27 1987.45 2469.49 7047.78 Ave 216.25 181.02 165.62 205.79 587.32 Source: Dept. of Civil Engineering Tech. meteorological station, Auchi Polytechnic Auchi Figure 1: Monthly Variation of Erosivity Index for 2005 – 2009 Figure 2: Monthly Variation of Erosivity Index for 2010– 2014 -500 0 500 1000 1500 2000 0 1 2 3 4 5 6 7 8 9 10 11 12 Erosivity Index (MJ mm/hr) Months 2005 2006 2007 2008 2009 -200 0 200 400 600 800 1000 1200 1400 0 1 2 3 4 5 6 7 8 9 10 11 12 Erosivity Index (MJ mm/hr Months 2010 2011 2012 2013 2014 © 2019 Global Journals Global Journal of Researches in Engineering 37 Year 2019 Estimation of Rainfall Erosivity Index for Auchi, Edo State, Using Lombardi’s Method Table 1b : Monthly, Total and Average erosivity index from 2010 – 2014 ( ) Volume XIxX Issue II Version I J