1. Determine the consistency in the rainfall recordings obtained at rain gauge station A. Annual rainfall (in mm) recorded at A and nearby stations B, C, D and E are given in the following table. Correct the observations recorded at A. (use double mass curve method). Annual rainfall (in mm) Year A B C D E 1985 2477 1919 2119 2719 2319 1986 2386 1897 2097 2697 2297 1987 2109 1827 2027 2627 2227 1988 2254 1864 2064 2664 2264 1989 2697 1974 2174 2774 2374 1990 2284 1871 2071 2671 2271 1991 2628 1957 2157 2757 2357 1992 2091 1823 2023 2623 2223 1993 2758 1990 2190 2790 2390 1994 2517 1929 2129 2729 2329 1995 2643 1961 2161 2761 2361 1996 2478 1920 2120 2720 2320 1997 2058 1815 2015 2615 2215 1998 2712 1978 2178 2778 2378 1999 2281 1870 2070 2670 2270 2000 3095 1949 2149 2749 2349 2001 2682 1846 2046 2646 2246 2002 3080 1945 2145 2745 2345 2003 2880 1895 2095 2695 2295 2004 3000 1925 2125 2725 2325 2005 3218 1980 2180 2780 2380 2006 2547 1812 2012 2612 2212 2007 2538 1810 2010 2610 2210 2008 3264 1991 2191 2791 2391 2009 2599 1825 2025 2625 2225